Initial commit

verl/third_party/vllm/vllm_v_0_6_3/__init__.py

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+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.

verl/third_party/vllm/vllm_v_0_6_3/arg_utils.py

@@ -0,0 +1,78 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/blob/main/vllm/engine/arg_utils.py
+
+import os
+from dataclasses import dataclass
+
+from transformers import PretrainedConfig
+from vllm.config import EngineConfig
+from vllm.engine.arg_utils import EngineArgs
+
+from .config import LoadConfig, ModelConfig
+
+
+@dataclass
+class EngineArgs(EngineArgs):
+    model_hf_config: PretrainedConfig = None  # for verl
+
+    def __post_init__(self):
+        pass
+
+    def create_model_config(self) -> ModelConfig:
+        return ModelConfig(
+            hf_config=self.model_hf_config,
+            tokenizer_mode=self.tokenizer_mode,
+            trust_remote_code=self.trust_remote_code,
+            dtype=self.dtype,
+            seed=self.seed,
+            revision=self.revision,
+            code_revision=self.code_revision,
+            rope_scaling=self.rope_scaling,
+            rope_theta=self.rope_theta,
+            tokenizer_revision=self.tokenizer_revision,
+            max_model_len=self.max_model_len,
+            quantization=self.quantization,
+            quantization_param_path=self.quantization_param_path,
+            enforce_eager=self.enforce_eager,
+            max_context_len_to_capture=self.max_context_len_to_capture,
+            max_seq_len_to_capture=self.max_seq_len_to_capture,
+            max_logprobs=self.max_logprobs,
+            disable_sliding_window=self.disable_sliding_window,
+            skip_tokenizer_init=self.skip_tokenizer_init,
+            served_model_name=self.served_model_name,
+            limit_mm_per_prompt=self.limit_mm_per_prompt,
+            use_async_output_proc=not self.disable_async_output_proc,
+            override_neuron_config=self.override_neuron_config,
+            config_format=self.config_format,
+            mm_processor_kwargs=self.mm_processor_kwargs,
+        )
+
+    def create_load_config(self) -> LoadConfig:
+        return LoadConfig(
+            load_format=self.load_format,
+            download_dir=self.download_dir,
+            model_loader_extra_config=self.model_loader_extra_config,
+            ignore_patterns=self.ignore_patterns,
+        )
+
+    def create_engine_config(self) -> EngineConfig:
+        engine_config = super().create_engine_config()
+
+        # NOTE[VERL]: Use the world_size set by torchrun
+        world_size = int(os.getenv("WORLD_SIZE", "-1"))
+        assert world_size != -1, "The world_size is set to -1, not initialized by TORCHRUN"
+        engine_config.parallel_config.world_size = world_size
+
+        return engine_config

verl/third_party/vllm/vllm_v_0_6_3/config.py

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+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/blob/main/vllm/config.py
+
+import enum
+import json
+from dataclasses import dataclass, field
+from typing import TYPE_CHECKING, List, Optional, Union
+
+from transformers import PretrainedConfig
+
+# Add for verl
+from vllm.config import ModelConfig
+from vllm.logger import init_logger
+from vllm.utils import is_hip
+
+if TYPE_CHECKING:
+    from vllm.model_executor.model_loader.loader import BaseModelLoader
+
+logger = init_logger(__name__)
+
+
+class LoadFormat(str, enum.Enum):
+    AUTO = "auto"
+    MEGATRON = "megatron"
+    HF = "hf"
+    DTENSOR = "dtensor"
+    DUMMY_HF = "dummy_hf"
+    DUMMY_MEGATRON = "dummy_megatron"
+    DUMMY_DTENSOR = "dummy_dtensor"
+
+
+class ModelConfig(ModelConfig):
+
+    def __init__(self, hf_config: PretrainedConfig, *args, **kwargs) -> None:
+        super().__init__(model=hf_config._name_or_path, tokenizer=hf_config._name_or_path, *args, **kwargs)
+        self.hf_config = hf_config
+
+
+@dataclass
+class LoadConfig:
+    """
+    download_dir: Directory to download and load the weights, default to the
+        default cache directory of huggingface.
+    load_format: The format of the model weights to load:
+        "auto" will try to load the weights in the safetensors format and
+            fall back to the pytorch bin format if safetensors format is
+            not available.
+        "pt" will load the weights in the pytorch bin format.
+        "safetensors" will load the weights in the safetensors format.
+        "npcache" will load the weights in pytorch format and store
+            a numpy cache to speed up the loading.
+        "dummy" will initialize the weights with random values, which is
+            mainly for profiling.
+        "tensorizer" will use CoreWeave's tensorizer library for
+            fast weight loading.
+        "bitsandbytes" will load nf4 type weights.
+    ignore_patterns: The list of patterns to ignore when loading the model.
+        Default to "original/**/*" to avoid repeated loading of llama's
+        checkpoints.
+
+    """
+
+    load_format: Union[str, LoadFormat, "BaseModelLoader"] = LoadFormat.AUTO
+    download_dir: Optional[str] = None
+    model_loader_extra_config: Optional[Union[str, dict]] = field(default_factory=dict)
+    ignore_patterns: Optional[Union[List[str], str]] = None
+
+    def __post_init__(self):
+        model_loader_extra_config = self.model_loader_extra_config or {}
+        if isinstance(model_loader_extra_config, str):
+            self.model_loader_extra_config = json.loads(model_loader_extra_config)
+        self._verify_load_format()
+
+        if self.ignore_patterns is not None and len(self.ignore_patterns) > 0:
+            logger.info("Ignoring the following patterns when downloading weights: %s", self.ignore_patterns)
+        else:
+            self.ignore_patterns = ["original/**/*"]
+
+    def _verify_load_format(self) -> None:
+        if not isinstance(self.load_format, str):
+            return
+
+        load_format = self.load_format.lower()
+        self.load_format = LoadFormat(load_format)
+
+        rocm_not_supported_load_format: List[str] = []
+        if is_hip() and load_format in rocm_not_supported_load_format:
+            rocm_supported_load_format = [
+                f for f in LoadFormat.__members__ if (f not in rocm_not_supported_load_format)
+            ]
+            raise ValueError(f"load format '{load_format}' is not supported in ROCm. "
+                             f"Supported load formats are "
+                             f"{rocm_supported_load_format}")

verl/third_party/vllm/vllm_v_0_6_3/dtensor_weight_loaders.py

@@ -0,0 +1,380 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/tree/main/vllm/model_executor/model_loader
+
+from typing import Dict
+
+import torch.nn as nn
+from torch.distributed._tensor import DTensor
+from vllm.model_executor.model_loader.weight_utils import default_weight_loader
+from vllm.model_executor.models.utils import is_pp_missing_parameter
+
+
+def gemma_dtensor_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    stacked_params_mapping = [
+        # (param_name, shard_name, shard_id)
+        ("qkv_proj", "q_proj", "q"),
+        ("qkv_proj", "k_proj", "k"),
+        ("qkv_proj", "v_proj", "v"),
+        ("gate_up_proj", "gate_proj", 0),
+        ("gate_up_proj", "up_proj", 1),
+    ]
+    params_dict = dict(vllm_model.named_parameters())
+    for name, loaded_weight in actor_weights.items():
+        for param_name, shard_name, shard_id in stacked_params_mapping:
+            if shard_name not in name:
+                continue
+            stacked_name = name.replace(shard_name, param_name)
+            # Skip loading extra bias for GPTQ models.
+            if stacked_name.endswith(".bias") and stacked_name not in params_dict:
+                continue
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            param = params_dict[stacked_name]
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype), shard_id)
+            break
+        else:
+            # lm_head is not used in vllm as it is tied with embed_token.
+            # To prevent errors, skip loading lm_head.weight.
+            if "lm_head.weight" in name:
+                continue
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            param = params_dict[name]
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype))
+
+
+def gptbigcode_dtensor_load_weights(actor_weights: Dict, vllm_model: nn.Module):
+    params_dict = dict(vllm_model.named_parameters(remove_duplicate=False))
+    for name, loaded_weight in actor_weights.items():
+        if "lm_head.weight" in name:
+            continue
+        if ".attn.bias" in name:
+            # Skip attention mask.
+            # NOTE: "c_attn.bias" should not be skipped.
+            continue
+        local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+        param = params_dict[name]
+        weight_loader = getattr(param, "weight_loader", default_weight_loader)
+        weight_loader(param, local_loaded_weight.to(dtype=param.dtype))
+
+
+def starcoder2_dtensor_load_weights(actor_weights: Dict, vllm_model: nn.Module):
+    stacked_params_mapping = [
+        # (param_name, shard_name, shard_id)
+        ("qkv_proj", "q_proj", "q"),
+        ("qkv_proj", "k_proj", "k"),
+        ("qkv_proj", "v_proj", "v"),
+    ]
+
+    params_dict = dict(vllm_model.named_parameters(remove_duplicate=False))
+    for name, loaded_weight in actor_weights.items():
+        if "rotary_emb.inv_freq" in name:
+            continue
+
+        for param_name, weight_name, shard_id in stacked_params_mapping:
+            if weight_name not in name:
+                continue
+            name = name.replace(weight_name, param_name)
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            param = params_dict[name]
+            weight_loader = param.weight_loader
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype), shard_id)
+            break
+        else:
+            if vllm_model.config.tie_word_embeddings and "lm_head.weight" in name:
+                continue
+            param = params_dict[name]
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype))
+
+
+def llama_dtensor_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    stacked_params_mapping = [
+        # (param_name, shard_name, shard_id)
+        (".qkv_proj", ".q_proj", "q"),
+        (".qkv_proj", ".k_proj", "k"),
+        (".qkv_proj", ".v_proj", "v"),
+        (".gate_up_proj", ".gate_proj", 0),
+        (".gate_up_proj", ".up_proj", 1),
+    ]
+    params_dict = dict(vllm_model.named_parameters())
+    for name, loaded_weight in actor_weights.items():
+        if "rotary_emb.inv_freq" in name:
+            continue
+        if "rotary_emb.cos_cached" in name or "rotary_emb.sin_cached" in name:
+            # Models trained using ColossalAI may include these tensors in
+            # the checkpoint. Skip them.
+            continue
+        # With tie_word_embeddings, we can skip lm_head.weight
+        # The weight might appear unnecessarily in the files if the model is
+        # processed with quantization, LoRA, fine-tuning, etc.
+        if vllm_model.config.tie_word_embeddings and "lm_head.weight" in name:
+            continue
+        for param_name, weight_name, shard_id in stacked_params_mapping:
+            if weight_name not in name:
+                continue
+            name = name.replace(weight_name, param_name)
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            param = params_dict[name]
+            weight_loader = param.weight_loader
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype), shard_id)
+            break
+        else:
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            param = params_dict[name]
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, local_loaded_weight)
+
+
+def qwen2_dtensor_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    stacked_params_mapping = [
+        # (param_name, shard_name, shard_id)
+        ("qkv_proj", "q_proj", "q"),
+        ("qkv_proj", "k_proj", "k"),
+        ("qkv_proj", "v_proj", "v"),
+        ("gate_up_proj", "gate_proj", 0),
+        ("gate_up_proj", "up_proj", 1),
+    ]
+    params_dict = dict(vllm_model.named_parameters(remove_duplicate=False))
+    for name, loaded_weight in actor_weights.items():
+        if "rotary_emb.inv_freq" in name:
+            continue
+        if vllm_model.config.tie_word_embeddings and "lm_head.weight" in name:
+            continue
+        for param_name, weight_name, shard_id in stacked_params_mapping:
+            if weight_name not in name:
+                continue
+            name = name.replace(weight_name, param_name)
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            param = params_dict[name]
+            weight_loader = param.weight_loader
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype), shard_id)
+            break
+        else:
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
+            param = params_dict[name]
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype))
+
+
+def qwen2vl_dtensor_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    stacked_params_mapping = [
+        # (param_name, shard_name, shard_id)
+        ("qkv_proj", "q_proj", "q"),
+        ("qkv_proj", "k_proj", "k"),
+        ("qkv_proj", "v_proj", "v"),
+        ("gate_up_proj", "gate_proj", 0),
+        ("gate_up_proj", "up_proj", 1),
+    ]
+    params_dict = dict(vllm_model.named_parameters(remove_duplicate=False))
+    for name, loaded_weight in actor_weights.items():
+        if "rotary_emb.inv_freq" in name:
+            continue
+        if vllm_model.config.tie_word_embeddings and "lm_head.weight" in name:
+            continue
+        for param_name, weight_name, shard_id in stacked_params_mapping:
+            if weight_name not in name:
+                continue
+            name = name.replace(weight_name, param_name)
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            param = params_dict[name]
+            weight_loader = param.weight_loader
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype), shard_id)
+            break
+        else:
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
+            param = params_dict[name]
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype))
+
+
+from vllm.model_executor.layers.fused_moe import FusedMoE
+
+
+def deepseekv2_dtensor_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    stacked_params_mapping = [
+        # (param_name, shard_name, shard_id)
+        ("gate_up_proj", "gate_proj", 0),
+        ("gate_up_proj", "up_proj", 1),
+    ]
+
+    # Params for weights, fp8 weight scales, fp8 activation scales
+    # (param_name, weight_name, expert_id, shard_id)
+    expert_params_mapping = FusedMoE.make_expert_params_mapping(
+        ckpt_gate_proj_name="gate_proj",
+        ckpt_down_proj_name="down_proj",
+        ckpt_up_proj_name="up_proj",
+        num_experts=vllm_model.config.n_routed_experts,
+    )
+
+    params_dict = dict(vllm_model.named_parameters(remove_duplicate=False))
+    for name, loaded_weight in actor_weights.items():
+        if "rotary_emb.inv_freq" in name:
+            continue
+        for param_name, weight_name, shard_id in stacked_params_mapping:
+            # Skip non-stacked layers and experts (experts handled below).
+            if weight_name not in name:
+                continue
+            # We have mlp.experts[0].gate_proj in the checkpoint.
+            # Since we handle the experts below in expert_params_mapping,
+            # we need to skip here BEFORE we update the name, otherwise
+            # name will be updated to mlp.experts[0].gate_up_proj, which
+            # will then be updated below in expert_params_mapping
+            # for mlp.experts[0].gate_gate_up_proj, which breaks load.
+            if ("mlp.experts." in name) and name not in params_dict:
+                continue
+            name = name.replace(weight_name, param_name)
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
+
+            if is_pp_missing_parameter(name, vllm_model):
+                continue
+
+            param = params_dict[name]
+            local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, local_loaded_weight.to(dtype=param.dtype), shard_id)
+            break
+        else:
+            for mapping in expert_params_mapping:
+                param_name, weight_name, expert_id, shard_id = mapping
+                if weight_name not in name:
+                    continue
+                name = name.replace(weight_name, param_name)
+
+                if is_pp_missing_parameter(name, vllm_model):
+                    continue
+
+                param = params_dict[name]
+                local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+                weight_loader = getattr(param, "weight_loader", default_weight_loader)
+                weight_loader(
+                    param,
+                    local_loaded_weight.to(dtype=param.dtype),
+                    weight_name,
+                    shard_id=shard_id,
+                    expert_id=expert_id,
+                )
+                break
+            else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+
+                if is_pp_missing_parameter(name, vllm_model):
+                    continue
+
+                param = params_dict[name]
+                local_loaded_weight = redistribute_dtensor(param_name=name, loaded_weights=loaded_weight)
+                weight_loader = getattr(param, "weight_loader", default_weight_loader)
+                weight_loader(param, local_loaded_weight.to(dtype=param.dtype))
+
+
+def gpt2_dtensor_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    pass
+
+
+def redistribute_dtensor(param_name: str, loaded_weights: DTensor, parallelize_plan: Dict = None):
+    param_name = _process_parameter_names(name=param_name)
+    if parallelize_plan is not None:
+        assert (
+            param_name
+            in parallelize_plan.keys()), f"param name: {param_name} not in parallelize_plan :{parallelize_plan.keys()}"
+        placement = parallelize_plan[param_name]
+        local_loaded_weights = loaded_weights.redistribute(device_mesh=loaded_weights.device_mesh,
+                                                           placements=placement).to_local()
+    else:
+        local_loaded_weights = loaded_weights.full_tensor()
+    return local_loaded_weights
+
+
+def _process_parameter_names(name):
+    # Remove '.weight' if it exists at the end of the string
+    if name.endswith(".weight"):
+        name = name[:-7]
+
+    # Remove 'model.layers.x.' or 'model.' prefix
+    if "model.layers" in name:
+        parts = name.split(".")
+        # Reconstruct the string without 'model.layers.x.'
+        name = ".".join(parts[3:])  # parts[0] is 'model', parts[1] is 'layers', parts[2] is 'x'
+    elif name.startswith("model."):
+        name = name[6:]  # Remove 'model.'
+
+    return name
+
+
+__MODEL_DTENSOR_WEIGHT_LOADER_REGISTRY__ = {
+    "GPT2LMHeadModel": gpt2_dtensor_weight_loader,
+    "LlamaForCausalLM": llama_dtensor_weight_loader,
+    "LLaMAForCausalLM": llama_dtensor_weight_loader,
+    "MistralForCausalLM": llama_dtensor_weight_loader,  # mistral is the same as llama in vLLM
+    "InternLMForCausalLM": llama_dtensor_weight_loader,
+    "AquilaModel": llama_dtensor_weight_loader,
+    "AquilaForCausalLM": llama_dtensor_weight_loader,
+    "Phi3ForCausalLM": llama_dtensor_weight_loader,
+    "GemmaForCausalLM": gemma_dtensor_weight_loader,
+    "Gemma2ForCausalLM": gemma_dtensor_weight_loader,
+    "GPTBigCodeForCausalLM": gptbigcode_dtensor_load_weights,
+    "Starcoder2ForCausalLM": starcoder2_dtensor_load_weights,
+    "Qwen2ForCausalLM": qwen2_dtensor_weight_loader,
+    "DeepseekV2ForCausalLM": deepseekv2_dtensor_weight_loader,
+    "Qwen2VLForConditionalGeneration": qwen2vl_dtensor_weight_loader,
+}
+
+
+# the actor model is .state_dict()
+# Load dtensor weights
+def load_dtensor_weights(actor_weights: Dict, vllm_model: nn.Module):
+    weight_loader = _get_model_weight_loader(vllm_model.__class__.__name__)
+    weight_loader(actor_weights, vllm_model)
+    # NOTE(sgm) to reduce peak memory usage, we offload vllm model to cpu
+    # after init, and we need this after sync model weights for in first iter.
+    vllm_model = vllm_model.cuda()
+
+
+def _get_model_weight_loader(arch: str):
+    if arch in __MODEL_DTENSOR_WEIGHT_LOADER_REGISTRY__:
+        return __MODEL_DTENSOR_WEIGHT_LOADER_REGISTRY__[arch]
+    raise ValueError(f"Model architectures {arch} are not supported for now. "
+                     f"Supported architectures: {__MODEL_DTENSOR_WEIGHT_LOADER_REGISTRY__.keys()}")
+
+
+# NOTE(sgm): we use per-parameter weight loader in each vllm sub
+def update_dtensor_weight_loader():
+    pass

verl/third_party/vllm/vllm_v_0_6_3/hf_weight_loader.py

@@ -0,0 +1,41 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/tree/main/vllm/model_executor/model_loader
+
+from typing import Dict
+
+import torch.nn as nn
+from vllm.model_executor.model_loader.utils import set_default_torch_dtype
+
+
+def update_hf_weight_loader():
+    print("no hf weight loader need to be updated")
+    return
+
+
+def load_hf_weights(actor_weights: Dict, vllm_model: nn.Module):
+    assert isinstance(actor_weights, Dict)
+    with set_default_torch_dtype(next(vllm_model.parameters()).dtype):  # TODO
+        if vllm_model.config.tie_word_embeddings and "lm_head.weight" in actor_weights.keys():
+            del actor_weights["lm_head.weight"]
+        vllm_model.load_weights(actor_weights.items())
+    for _, module in vllm_model.named_modules():
+        quant_method = getattr(module, "quant_method", None)
+        if quant_method is not None:
+            quant_method.process_weights_after_loading(module)
+        # FIXME: Remove this after Mixtral is updated
+        # to use quant_method.
+        if hasattr(module, "process_weights_after_loading"):
+            module.process_weights_after_loading()
+    vllm_model = vllm_model.cuda()

verl/third_party/vllm/vllm_v_0_6_3/llm.py

@@ -0,0 +1,200 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/blob/main/vllm/entrypoints/llm.py
+
+from typing import Dict, List, Optional, Tuple, Union
+
+import torch
+import torch.nn as nn
+from torch.nn.utils.rnn import pad_sequence
+from transformers import PretrainedConfig, PreTrainedTokenizer, PreTrainedTokenizerFast
+from verl.workers.rollout.tokenizer import HybridEngineBaseTokenizer
+from vllm import LLM
+from vllm.outputs import EmbeddingRequestOutput, RequestOutput
+from vllm.utils import Counter
+
+from .arg_utils import EngineArgs
+from .llm_engine_sp import LLMEngine
+
+
+class LLM(LLM):
+    """An LLM for generating texts from given prompts and sampling parameters.
+
+    This class includes a tokenizer, a language model (possibly distributed
+    across multiple GPUs), and GPU memory space allocated for intermediate
+    states (aka KV cache). Given a batch of prompts and sampling parameters,
+    this class generates texts from the model, using an intelligent batching
+    mechanism and efficient memory management.
+
+    NOTE: This class is intended to be used for offline inference. For online
+    serving, use the `AsyncLLMEngine` class instead.
+    NOTE: For the comprehensive list of arguments, see `EngineArgs`.
+
+    Args:
+        model: A HuggingFace Transformers model instance.
+        tokenizer: A HuggingFace Transformers tokenizer instance.
+        tokenizer_mode: The tokenizer mode. "auto" will use the fast tokenizer
+            if available, and "slow" will always use the slow tokenizer.
+        trust_remote_code: Trust remote code (e.g., from HuggingFace) when
+            downloading the model and tokenizer.
+        tensor_parallel_size: The number of GPUs to use for distributed
+            execution with tensor parallelism.
+        dtype: The data type for the model weights and activations. Currently,
+            we support `float32`, `float16`, and `bfloat16`. If `auto`, we use
+            the `torch_dtype` attribute specified in the model config file.
+            However, if the `torch_dtype` in the config is `float32`, we will
+            use `float16` instead.
+        quantization: The method used to quantize the model weights. Currently,
+            we support "awq". If None, we assume the model weights are not
+            quantized and use `dtype` to determine the data type of the weights.
+        revision: The specific model version to use. It can be a branch name,
+            a tag name, or a commit id.
+        tokenizer_revision: The specific tokenizer version to use. It can be a
+            branch name, a tag name, or a commit id.
+        seed: The seed to initialize the random number generator for sampling.
+        gpu_memory_utilization: The ratio (between 0 and 1) of GPU memory to
+            reserve for the model weights, activations, and KV cache. Higher
+            values will increase the KV cache size and thus improve the model's
+            throughput. However, if the value is too high, it may cause out-of-
+            memory (OOM) errors.
+        swap_space: The size (GiB) of CPU memory per GPU to use as swap space.
+            This can be used for temporarily storing the states of the requests
+            when their `best_of` sampling parameters are larger than 1. If all
+            requests will have `best_of=1`, you can safely set this to 0.
+            Otherwise, too small values may cause out-of-memory (OOM) errors.
+        enforce_eager: Whether to enforce eager execution. If True, we will
+            disable CUDA graph and always execute the model in eager mode.
+            If False, we will use CUDA graph and eager execution in hybrid.
+        max_context_len_to_capture: Maximum context len covered by CUDA graphs.
+            When a sequence has context length larger than this, we fall back
+            to eager mode.
+        disable_custom_all_reduce: See ParallelConfig
+    """
+
+    def __init__(
+        self,
+        model: Union[nn.Module, Dict],  # model itself or its parameter dict
+        tokenizer: Union[PreTrainedTokenizer, PreTrainedTokenizerFast, HybridEngineBaseTokenizer],
+        model_hf_config: PretrainedConfig,
+        tokenizer_mode: str = "auto",
+        trust_remote_code: bool = False,
+        skip_tokenizer_init: bool = False,
+        tensor_parallel_size: int = 1,
+        dtype: str = "auto",
+        quantization: Optional[str] = None,
+        revision: Optional[str] = None,
+        tokenizer_revision: Optional[str] = None,
+        seed: int = 0,
+        gpu_memory_utilization: float = 0.9,
+        swap_space: int = 4,
+        cpu_offload_gb: float = 0,
+        enforce_eager: bool = False,
+        max_context_len_to_capture: Optional[int] = None,
+        max_seq_len_to_capture: int = 8192,
+        disable_custom_all_reduce: bool = False,
+        load_format="auto",
+        **kwargs,
+    ) -> None:
+        if "disable_log_stats" not in kwargs:
+            kwargs["disable_log_stats"] = True
+        removed_vision_keys = ("image_token_id", "image_feature_size", "image_input_shape", "image_input_type")
+        if any(k in kwargs for k in removed_vision_keys):
+            raise TypeError("There is no need to pass vision-related arguments anymore.")
+        engine_args = EngineArgs(
+            model_hf_config=model_hf_config,
+            # tokenizer=tokenizer,
+            tokenizer_mode=tokenizer_mode,
+            skip_tokenizer_init=skip_tokenizer_init,
+            trust_remote_code=trust_remote_code,
+            tensor_parallel_size=tensor_parallel_size,
+            dtype=dtype,
+            quantization=quantization,
+            revision=revision,
+            tokenizer_revision=tokenizer_revision,
+            seed=seed,
+            gpu_memory_utilization=gpu_memory_utilization,
+            swap_space=swap_space,
+            cpu_offload_gb=cpu_offload_gb,
+            enforce_eager=enforce_eager,
+            max_context_len_to_capture=max_context_len_to_capture,
+            max_seq_len_to_capture=max_seq_len_to_capture,
+            disable_custom_all_reduce=disable_custom_all_reduce,
+            load_format=load_format,
+            **kwargs,
+        )
+        tokenizer_cls = (PreTrainedTokenizer, PreTrainedTokenizerFast, HybridEngineBaseTokenizer)
+        if not isinstance(tokenizer, tokenizer_cls):
+            raise ValueError(
+                f"Unexpected tokenizer type: {type(tokenizer)}. Must be"
+                "one of the following: PreTrainedTokenizer, PreTrainedTokenizerFast, verl.workers.rollout.HybridEngineBaseTokenizer"
+            )
+        self.llm_engine = LLMEngine.from_engine_args(model, tokenizer, engine_args)  # TODO: check usagecontext
+        self.request_counter = Counter()
+
+    def init_cache_engine(self):
+        self.llm_engine.init_cache_engine()
+
+    def free_cache_engine(self):
+        self.llm_engine.free_cache_engine()
+
+    def get_tokenizer(self) -> Union[PreTrainedTokenizer, PreTrainedTokenizerFast]:
+        return self.llm_engine.tokenizer
+
+    def set_tokenizer(
+        self,
+        tokenizer: Union[PreTrainedTokenizer, PreTrainedTokenizerFast],
+    ) -> None:
+        self.llm_engine.tokenizer = tokenizer
+
+    def _run_engine(self, *, use_tqdm: bool) -> List[Union[RequestOutput, EmbeddingRequestOutput]]:
+        outputs = super()._run_engine(use_tqdm=use_tqdm)
+        return self._post_process_outputs(outputs)
+
+    # # NOTE(shengguangming): add for verl
+    # # TODO(sgm): we can optimize it by making the dataloader yield List[int] without padding.
+    # def _pre_process_inputs(self, prompt_token_ids: torch.Tensor) -> List[int]:
+    #     # remove the left padding in the prompt token_id
+    #     pad_token_id = self.llm_engine.tokenizer.pad_token_id if self.llm_engine.tokenizer.pad_token_id is not None else self.llm_engine.tokenizer.eos_token_id
+    #     non_pad_index = torch.nonzero(prompt_token_ids != pad_token_id, as_tuple=False)[0][0]
+    #     token_ids = prompt_token_ids[non_pad_index:].tolist()
+    #     return token_ids
+
+    # NOTE(shengguangming): add for verl
+    def _post_process_outputs(self, request_outputs: List[RequestOutput]) -> Tuple[torch.Tensor, torch.Tensor]:
+        output_token_ids = []
+        logprobs = []
+        for request_output in request_outputs:  # List[RequestOutput]
+            outputs = request_output.outputs
+            for output in outputs:  # List[CompletionOutput], usually len == 1
+                output_token_ids.append(torch.tensor(output.token_ids))
+                # TODO(shengguangming): can be optimzied by rewrite the Sampler._get_logprobs() logits
+                logprobs_dicts = output.logprobs
+                if logprobs_dicts is not None:
+                    logprob = []
+                    for logprobs_dict, id in zip(logprobs_dicts, output.token_ids):
+                        logprob.append(logprobs_dict[id].logprob)
+                    logprobs.append(torch.tensor(logprob))
+
+        pad_token_id = (self.llm_engine.tokenizer.pad_token_id if self.llm_engine.tokenizer.pad_token_id is not None
+                        else self.llm_engine.tokenizer.eos_token_id)
+        output_token_ids = pad_sequence(output_token_ids, batch_first=True, padding_value=pad_token_id)
+        if len(logprobs) > 0:
+            logprobs = pad_sequence(logprobs, batch_first=True, padding_value=pad_token_id)
+        return output_token_ids, logprobs
+
+    def sync_model_weights(self, actor_weights: Dict[str, torch.Tensor], load_format: str) -> None:
+        self.llm_engine.sync_model_weights(actor_weights=actor_weights, load_format=load_format)
+
+    def offload_model_weights(self) -> None:
+        self.llm_engine.offload_model_weights()

verl/third_party/vllm/vllm_v_0_6_3/llm_engine_sp.py

@@ -0,0 +1,408 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/blob/main/vllm/engine/llm_engine.py
+
+from functools import partial
+from typing import Callable, Dict, Optional, Type, Union
+
+import torch
+import torch.nn as nn
+from vllm.config import (
+    CacheConfig,
+    DecodingConfig,
+    DeviceConfig,
+    EngineConfig,
+    LoadConfig,
+    LoRAConfig,
+    ModelConfig,
+    ObservabilityConfig,
+    ParallelConfig,
+    PromptAdapterConfig,
+    SchedulerConfig,
+    SpeculativeConfig,
+)
+from vllm.core.scheduler import Scheduler
+from vllm.engine.arg_utils import EngineArgs
+from vllm.engine.llm_engine import LLMEngine, SchedulerContext, SchedulerOutputState, _load_generation_config_dict
+from vllm.engine.metrics_types import StatLoggerBase
+from vllm.engine.output_processor.interfaces import SequenceGroupOutputProcessor
+from vllm.engine.output_processor.stop_checker import StopChecker
+from vllm.executor.executor_base import ExecutorBase
+from vllm.inputs import INPUT_REGISTRY, InputRegistry
+from vllm.inputs.preprocess import InputPreprocessor
+from vllm.logger import init_logger
+from vllm.sequence import Sequence
+from vllm.tracing import init_tracer
+from vllm.transformers_utils.detokenizer import Detokenizer
+from vllm.transformers_utils.tokenizer import AnyTokenizer
+from vllm.usage.usage_lib import UsageContext, is_usage_stats_enabled, usage_message
+from vllm.utils import Counter, weak_bind
+from vllm.version import __version__ as VLLM_VERSION
+
+from .arg_utils import EngineArgs
+from .config import LoadConfig, ModelConfig
+from .tokenizer import TokenizerGroup
+
+logger = init_logger(__name__)
+_LOCAL_LOGGING_INTERVAL_SEC = 5
+
+
+class LLMEngine(LLMEngine):
+    """An LLM engine that receives requests and generates texts.
+
+    This is the main class for the vLLM engine. It receives requests
+    from clients and generates texts from the LLM. It includes a tokenizer, a
+    language model (possibly distributed across multiple GPUs), and GPU memory
+    space allocated for intermediate states (aka KV cache). This class utilizes
+    iteration-level scheduling and efficient memory management to maximize the
+    serving throughput.
+
+    The :class:`~vllm.LLM` class wraps this class for offline batched inference
+    and the :class:`AsyncLLMEngine` class wraps this class for online serving.
+
+    The config arguments are derived from :class:`~vllm.EngineArgs`. (See
+    :ref:`engine_args`)
+
+    Args:
+        model_config: The configuration related to the LLM model.
+        cache_config: The configuration related to the KV cache memory
+            management.
+        parallel_config: The configuration related to distributed execution.
+        scheduler_config: The configuration related to the request scheduler.
+        device_config: The configuration related to the device.
+        lora_config (Optional): The configuration related to serving multi-LoRA.
+        speculative_config (Optional): The configuration related to speculative
+            decoding.
+        executor_class: The model executor class for managing distributed
+            execution.
+        prompt_adapter_config (Optional): The configuration related to serving
+            prompt adapters.
+        log_stats: Whether to log statistics.
+        usage_context: Specified entry point, used for usage info collection.
+    """
+
+    def __init__(
+        self,
+        # NOTE(sgm): first two arguments are added for verl
+        model: Union[nn.Module, Dict],  # model itself or its parameter dict
+        tokenizer: nn.Module,
+        # NOTE(sgm): vllm original arguments
+        model_config: ModelConfig,
+        cache_config: CacheConfig,
+        parallel_config: ParallelConfig,
+        scheduler_config: SchedulerConfig,
+        device_config: DeviceConfig,
+        load_config: LoadConfig,
+        lora_config: Optional[LoRAConfig],
+        speculative_config: Optional[SpeculativeConfig],
+        decoding_config: Optional[DecodingConfig],
+        observability_config: Optional[ObservabilityConfig],
+        prompt_adapter_config: Optional[PromptAdapterConfig],
+        executor_class: Type[ExecutorBase],
+        log_stats: bool,
+        usage_context: UsageContext = UsageContext.ENGINE_CONTEXT,
+        stat_loggers: Optional[Dict[str, StatLoggerBase]] = None,
+        input_registry: InputRegistry = INPUT_REGISTRY,
+        use_cached_outputs: bool = False,
+    ) -> None:
+        logger.info(
+            "Initializing an LLM engine (v%s) with config: "
+            "model=%r, speculative_config=%r, tokenizer=%r, "
+            "skip_tokenizer_init=%s, tokenizer_mode=%s, revision=%s, "
+            "override_neuron_config=%s, "
+            "rope_scaling=%r, rope_theta=%r, tokenizer_revision=%s, "
+            "trust_remote_code=%s, dtype=%s, max_seq_len=%d, "
+            "download_dir=%r, load_format=%s, tensor_parallel_size=%d, "
+            "pipeline_parallel_size=%d, "
+            "disable_custom_all_reduce=%s, quantization=%s, "
+            "enforce_eager=%s, kv_cache_dtype=%s, "
+            "quantization_param_path=%s, device_config=%s, "
+            "decoding_config=%r, observability_config=%r, "
+            "seed=%d, served_model_name=%s, use_v2_block_manager=%s, "
+            "num_scheduler_steps=%d, chunked_prefill_enabled=%s "
+            "multi_step_stream_outputs=%s, enable_prefix_caching=%s, "
+            "use_async_output_proc=%s, use_cached_outputs=%s, "
+            "mm_processor_kwargs=%s)",
+            VLLM_VERSION,
+            model_config.model,
+            speculative_config,
+            model_config.tokenizer,
+            model_config.skip_tokenizer_init,
+            model_config.tokenizer_mode,
+            model_config.revision,
+            model_config.override_neuron_config,
+            model_config.rope_scaling,
+            model_config.rope_theta,
+            model_config.tokenizer_revision,
+            model_config.trust_remote_code,
+            model_config.dtype,
+            model_config.max_model_len,
+            load_config.download_dir,
+            load_config.load_format,
+            parallel_config.tensor_parallel_size,
+            parallel_config.pipeline_parallel_size,
+            parallel_config.disable_custom_all_reduce,
+            model_config.quantization,
+            model_config.enforce_eager,
+            cache_config.cache_dtype,
+            model_config.quantization_param_path,
+            device_config.device,
+            decoding_config,
+            observability_config,
+            model_config.seed,
+            model_config.served_model_name,
+            scheduler_config.use_v2_block_manager,
+            scheduler_config.num_scheduler_steps,
+            scheduler_config.chunked_prefill_enabled,
+            scheduler_config.multi_step_stream_outputs,
+            cache_config.enable_prefix_caching,
+            model_config.use_async_output_proc,
+            use_cached_outputs,
+            model_config.mm_processor_kwargs,
+        )
+        # TODO(woosuk): Print more configs in debug mode.
+        self.model_config = model_config
+        self.cache_config = cache_config
+        self.lora_config = lora_config
+        self.parallel_config = parallel_config
+        self.scheduler_config = scheduler_config
+        self.device_config = device_config
+        self.speculative_config = speculative_config
+        self.load_config = load_config
+        self.decoding_config = decoding_config or DecodingConfig()
+        self.prompt_adapter_config = prompt_adapter_config
+        self.observability_config = observability_config or ObservabilityConfig()
+        self.log_stats = log_stats
+        self.use_cached_outputs = use_cached_outputs
+
+        if not self.model_config.skip_tokenizer_init:
+            self.tokenizer = self._init_tokenizer(tokenizer)
+            self.detokenizer = Detokenizer(self.tokenizer)
+            tokenizer_group = self.get_tokenizer_group()
+        else:
+            self.tokenizer = None
+            self.detokenizer = None
+            tokenizer_group = None
+
+        # Ensure that the function doesn't contain a reference to self,
+        # to avoid engine GC issues
+        def get_tokenizer_for_seq(sequence: Sequence) -> AnyTokenizer:
+            assert tokenizer_group, "tokenizer_group cannot be None, " "make sure skip_tokenizer_init is False"
+            return tokenizer_group.get_lora_tokenizer(sequence.lora_request)
+
+        self.seq_counter = Counter()
+        self.generation_config_fields = _load_generation_config_dict(model_config)
+
+        self.input_preprocessor = InputPreprocessor(model_config, self.tokenizer)
+
+        self.input_registry = input_registry
+        self.input_processor = input_registry.create_input_processor(model_config)
+
+        self.model_executor = executor_class(
+            model=model,  # add for spmd_gpu_executor
+            model_config=model_config,
+            cache_config=cache_config,
+            parallel_config=parallel_config,
+            scheduler_config=scheduler_config,
+            device_config=device_config,
+            lora_config=lora_config,
+            speculative_config=speculative_config,
+            load_config=load_config,
+            prompt_adapter_config=prompt_adapter_config,
+            observability_config=self.observability_config,
+        )
+
+        if not self.model_config.embedding_mode:
+            self._initialize_kv_caches()
+
+        # If usage stat is enabled, collect relevant info.
+        if is_usage_stats_enabled():
+            from vllm.model_executor.model_loader import get_architecture_class_name
+
+            usage_message.report_usage(
+                get_architecture_class_name(model_config),
+                usage_context,
+                extra_kvs={
+                    # Common configuration
+                    "dtype": str(model_config.dtype),
+                    "tensor_parallel_size": parallel_config.tensor_parallel_size,
+                    "block_size": cache_config.block_size,
+                    "gpu_memory_utilization": cache_config.gpu_memory_utilization,
+                    # Quantization
+                    "quantization": model_config.quantization,
+                    "kv_cache_dtype": str(cache_config.cache_dtype),
+                    # Feature flags
+                    "enable_lora": bool(lora_config),
+                    "enable_prompt_adapter": bool(prompt_adapter_config),
+                    "enable_prefix_caching": cache_config.enable_prefix_caching,
+                    "enforce_eager": model_config.enforce_eager,
+                    "disable_custom_all_reduce": parallel_config.disable_custom_all_reduce,
+                },
+            )
+
+        if self.tokenizer:
+            # Ping the tokenizer to ensure liveness if it runs in a
+            # different process.
+            self.tokenizer.ping()
+
+        self.cached_scheduler_outputs = [
+            SchedulerOutputState() for _ in range(self.parallel_config.pipeline_parallel_size)
+        ]
+
+        self.scheduler_contexts = [
+            SchedulerContext(multi_step_stream_outputs=self.scheduler_config.multi_step_stream_outputs)
+            for _ in range(self.parallel_config.pipeline_parallel_size)
+        ]
+
+        if model_config.use_async_output_proc:
+            process_model_outputs = weak_bind(self._process_model_outputs)
+
+            self.async_callbacks = [
+                partial(process_model_outputs, ctx=self.scheduler_contexts[v_id])
+                for v_id in range(self.parallel_config.pipeline_parallel_size)
+            ]
+        else:
+            self.async_callbacks = []
+
+        # Currently used by AsyncLLMEngine to ensure quick append
+        # of request outputs to asyncio queues
+        self.process_request_outputs_callback: Optional[Callable] = None
+
+        # Create the scheduler.
+        # NOTE: the cache_config here have been updated with the numbers of
+        # GPU and CPU blocks, which are profiled in the distributed executor.
+        self.scheduler = [
+            Scheduler(
+                scheduler_config,
+                cache_config,
+                lora_config,
+                parallel_config.pipeline_parallel_size,
+                self.async_callbacks[v_id] if model_config.use_async_output_proc else None,
+            ) for v_id in range(parallel_config.pipeline_parallel_size)
+        ]
+
+        # Metric Logging.
+        if self.log_stats:
+            if stat_loggers is not None:
+                self.stat_loggers = stat_loggers
+            else:
+                # Lazy import for prometheus multiprocessing.
+                # We need to set PROMETHEUS_MULTIPROC_DIR environment variable
+                # before prometheus_client is imported.
+                # See https://prometheus.github.io/client_python/multiprocess/
+                from vllm.engine.metrics import LoggingStatLogger, PrometheusStatLogger
+
+                self.stat_loggers = {
+                    "logging":
+                        LoggingStatLogger(local_interval=_LOCAL_LOGGING_INTERVAL_SEC),
+                    "prometheus":
+                        PrometheusStatLogger(
+                            local_interval=_LOCAL_LOGGING_INTERVAL_SEC,
+                            labels=dict(model_name=model_config.served_model_name),
+                            max_model_len=self.model_config.max_model_len,
+                        ),
+                }
+                self.stat_loggers["prometheus"].info("cache_config", self.cache_config)
+
+        self.tracer = None
+        if self.observability_config.otlp_traces_endpoint:
+            self.tracer = init_tracer("vllm.llm_engine", self.observability_config.otlp_traces_endpoint)
+
+        # Create sequence output processor, e.g. for beam search or
+        # speculative decoding.
+        self.output_processor = SequenceGroupOutputProcessor.create_output_processor(
+            self.scheduler_config,
+            self.detokenizer,
+            self.scheduler,
+            self.seq_counter,
+            get_tokenizer_for_seq,
+            stop_checker=StopChecker(
+                self.scheduler_config.max_model_len,
+                get_tokenizer_for_seq,
+            ),
+        )
+
+    # TODO(sgm): add for verl but we may not tokenizer in Rollout
+    def _init_tokenizer(self, tokenizer, **tokenizer_init_kwargs):
+        init_kwargs = dict(enable_lora=bool(self.lora_config),
+                           max_num_seqs=self.scheduler_config.max_num_seqs,
+                           max_input_length=None)
+        init_kwargs.update(tokenizer_init_kwargs)
+        return TokenizerGroup(tokenizer, **init_kwargs)
+
+    def init_cache_engine(self):
+        # TODO: check whether we should rebuild the CUDAGraph every iter when offload/load KVCache
+        # Re-capture CUDAGraph would be time-consuming
+        self.model_executor.init_cache_engine()
+
+    def free_cache_engine(self):
+        self.model_executor.free_cache_engine()
+
+    # NOTE(sgm): currently, we only support GPU executor
+    # The GPUExecutor remove the Ray dependency
+    @classmethod
+    def _get_executor_cls(cls, engine_config: EngineConfig) -> Type[ExecutorBase]:
+        distributed_executor_backend = engine_config.parallel_config.distributed_executor_backend
+        # Initialize the cluster and specify the executor class.]
+        assert (engine_config.device_config.device_type == "cuda"
+               ), "Currently, the vllm in verl only support running on GPU"
+
+        # print('Waiting for debugger'); import os,debugpy; debugpy.listen(('localhost', 5678 + int(os.getenv('RANK', '0')))); debugpy.wait_for_client()
+        if engine_config.parallel_config.world_size == 1:
+            engine_config.load_config.load_format = "dummy_hf"
+
+        from .spmd_gpu_executor import SPMDGPUExecutor
+
+        executor_class = SPMDGPUExecutor
+
+        return executor_class
+
+    @classmethod
+    def from_engine_args(
+        cls,
+        model,
+        tokenizer,
+        engine_args: EngineArgs,
+        usage_context: UsageContext = UsageContext.ENGINE_CONTEXT,
+        stat_loggers: Optional[Dict[str, StatLoggerBase]] = None,
+    ) -> "LLMEngine":
+        """Creates an LLM engine from the engine arguments."""
+        # Create the engine configs.
+        engine_config = engine_args.create_engine_config()
+        executor_class = cls._get_executor_cls(engine_config)
+        # Initialize the cluster and specify the executor class.
+        assert (engine_config.device_config.device_type == "cuda"
+               ), "Currently, the vllm in verl only support running on GPU"
+
+        from .spmd_gpu_executor import SPMDGPUExecutor
+
+        executor_class = SPMDGPUExecutor
+
+        # Create the LLM engine.
+        engine = cls(
+            model,
+            tokenizer,
+            **engine_config.to_dict(),
+            executor_class=executor_class,
+            log_stats=not engine_args.disable_log_stats,
+            usage_context=usage_context,
+            stat_loggers=stat_loggers,
+        )
+        return engine
+
+    def sync_model_weights(self, actor_weights: Dict[str, torch.Tensor], load_format: str) -> None:
+        self.model_executor.sync_model_weights(actor_weights=actor_weights, load_format=load_format)
+
+    def offload_model_weights(self) -> None:
+        self.model_executor.offload_model_weights()

verl/third_party/vllm/vllm_v_0_6_3/megatron_weight_loaders.py

@@ -0,0 +1,308 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/tree/main/vllm/model_executor/model_loader
+
+from typing import Dict
+
+import torch
+import torch.nn as nn
+from vllm.model_executor.layers.linear import *
+from vllm.model_executor.layers.vocab_parallel_embedding import ParallelLMHead, VocabParallelEmbedding
+from vllm.model_executor.models import ModelRegistry
+
+
+# NOTE(shengguangming): replace the origin weight loader function in the class
+def parallel_weight_loader(self, param: torch.Tensor, loaded_weight: torch.Tensor) -> None:
+    """Parallel Linear weight loader."""
+    assert (param.size() == loaded_weight.size(
+    )), "the parameter size is not align with the loaded weight size, param size: {}, loaded_weight size: {}".format(
+        param.size(), loaded_weight.size())
+    assert (param.data.dtype == loaded_weight.data.dtype
+           ), "if we want to shared weights, the data type should also be the same"
+
+    param.data = loaded_weight.data
+
+
+def default_weight_loader(param: torch.Tensor, loaded_weight: torch.Tensor) -> None:
+    """Default weight loader."""
+    assert param.size() == loaded_weight.size()
+    assert (param.data.dtype == loaded_weight.data.dtype
+           ), "if we want to shared weights, the data type should also be the same"
+
+    param.data = loaded_weight.data
+
+
+def gpt2_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    params_dict = dict(vllm_model.named_parameters(remove_duplicate=False))
+    for name, loaded_weight in actor_weights.items():
+        if "lm_head.weight" in name:
+            # GPT-2 ties the weights of the embedding layer and the final
+            # linear layer.
+            continue
+        if ".attn.bias" in name or ".attn.masked_bias" in name:
+            # Skip attention mask.
+            # NOTE: "c_attn.bias" should not be skipped.
+            continue
+        if not name.startswith("transformer."):
+            name = "transformer." + name
+        param = params_dict[name]
+        # The HF's GPT-2 implementation uses Conv1D instead of Linear.
+        # Because of this, we need to transpose the weights.
+        # Note(zhuohan): the logic below might break quantized models.
+        for conv1d_weight_name in ["c_attn", "c_proj", "c_fc"]:
+            if conv1d_weight_name not in name:
+                continue
+            if not name.endswith(".weight"):
+                continue
+            # TODO: check megatron
+            loaded_weight = loaded_weight.t()
+        weight_loader = getattr(param, "weight_loader", default_weight_loader)
+        weight_loader(param, loaded_weight)
+
+
+def llama_megatron_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    # NOTE(shengguangming): the megatron llama may have this prefix
+    params_dict = dict(vllm_model.named_parameters())
+    for name, loaded_weight in actor_weights.items():
+        if "rotary_emb.inv_freq" in name:
+            continue
+        else:
+            param = params_dict[name]
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, loaded_weight)
+
+
+def llama_megatron_core_te_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    params_mapping = [
+        # (megatron core gpt model name, vllm model name)
+        ("embedding.word_embeddings", "model.embed_tokens"),
+        ("self_attention.linear_qkv.layer_norm_weight", "input_layernorm.weight"),
+        ("self_attention.linear_qkv.layer_norm_bias", "input_layernorm.bias"),
+        ("self_attention.linear_qkv", "self_attn.qkv_proj"),
+        ("self_attention.linear_qkv", "self_attn.qkv_proj"),
+        ("self_attention.linear_proj", "self_attn.o_proj"),
+        ("pre_mlp_layernorm", "post_attention_layernorm"),
+        ("mlp.linear_fc1.layer_norm_weight", "post_attention_layernorm.weight"),
+        ("mlp.linear_fc1.layer_norm_bias", "post_attention_layernorm.bias"),
+        ("mlp.linear_fc1", "mlp.gate_up_proj"),
+        ("mlp.linear_fc2", "mlp.down_proj"),
+        ("decoder.final_layernorm", "model.norm"),
+        ("output_layer", "lm_head"),
+    ]
+    # NOTE(shengguangming): the megatron llama may have this prefix
+    params_dict = dict(vllm_model.named_parameters())
+    for name, loaded_weight in actor_weights.items():
+        name = _replace_name(name, params_mapping)
+        if name.endswith(".bias") and name not in params_dict:
+            continue
+        if "rotary_emb.inv_freq" in name:
+            continue
+        else:
+            param = params_dict[name]
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, loaded_weight)
+
+
+def llama_megatron_core_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    params_mapping = [
+        # (megatron core gpt model name, vllm model name)
+        ("embedding.word_embeddings", "model.embed_tokens"),
+        ("self_attention.linear_qkv", "self_attn.qkv_proj"),
+        ("self_attention.linear_proj", "self_attn.o_proj"),
+        (
+            "input_layernorm",
+            "input_layernorm",
+        ),
+        ("pre_mlp_layernorm", "post_attention_layernorm"),
+        ("mlp.linear_fc1", "mlp.gate_up_proj"),
+        ("mlp.linear_fc2", "mlp.down_proj"),
+        ("decoder.final_layernorm", "model.norm"),
+        ("output_layer", "lm_head"),
+    ]
+    # NOTE(shengguangming): the megatron llama may have this prefix
+    params_dict = dict(vllm_model.named_parameters())
+    for name, loaded_weight in actor_weights.items():
+        name = _replace_name(name, params_mapping)
+        if name.endswith(".bias") and name not in params_dict:
+            continue
+        if "rotary_emb.inv_freq" in name:
+            continue
+        else:
+            param = params_dict[name]
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, loaded_weight)
+
+
+def _replace_name(megatron_name, name_mapping):
+    for m_name, v_name in name_mapping:
+        if m_name not in megatron_name:
+            continue
+        if "layers" in megatron_name:  # deal with decoder layers
+            megatron_name = megatron_name.replace("decoder", "model")
+            megatron_name_list = megatron_name.split(".")
+            if "layer_norm_weight" in megatron_name_list or "layer_norm_bias" in megatron_name_list:
+                param_name_list = megatron_name_list[:3]
+                param_name_list.append(v_name)
+                param_name = ".".join(param_name_list)
+            else:
+                param_name_list = megatron_name_list[:3]
+                weight_or_bias = megatron_name_list[-1]
+                param_name_list.append(v_name)
+                param_name_list.append(weight_or_bias)
+                param_name = ".".join(param_name_list)
+            return param_name
+        else:
+            param_name = megatron_name.replace(m_name, v_name)
+            return param_name
+
+
+def llama_megatron_core_te_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    params_mapping = [
+        # (megatron core gpt model name, vllm model name)
+        ("embedding.word_embeddings", "model.embed_tokens"),
+        ("self_attention.linear_qkv.layer_norm_weight", "input_layernorm.weight"),
+        ("self_attention.linear_qkv.layer_norm_bias", "input_layernorm.bias"),
+        ("self_attention.linear_qkv", "self_attn.qkv_proj"),
+        ("self_attention.linear_qkv", "self_attn.qkv_proj"),
+        ("self_attention.linear_proj", "self_attn.o_proj"),
+        ("pre_mlp_layernorm", "post_attention_layernorm"),
+        ("mlp.linear_fc1.layer_norm_weight", "post_attention_layernorm.weight"),
+        ("mlp.linear_fc1.layer_norm_bias", "post_attention_layernorm.bias"),
+        ("mlp.linear_fc1", "mlp.gate_up_proj"),
+        ("mlp.linear_fc2", "mlp.down_proj"),
+        ("decoder.final_layernorm", "model.norm"),
+        ("output_layer", "lm_head"),
+    ]
+    # NOTE(shengguangming): the megatron llama may have this prefix
+    params_dict = dict(vllm_model.named_parameters())
+    for name, loaded_weight in actor_weights.items():
+        name = _replace_name(name, params_mapping)
+        if name.endswith(".bias") and name not in params_dict:
+            continue
+        if "rotary_emb.inv_freq" in name:
+            continue
+        else:
+            param = params_dict[name]
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, loaded_weight)
+
+
+def llama_megatron_core_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    params_mapping = [
+        # (megatron core gpt model name, vllm model name)
+        ("embedding.word_embeddings", "model.embed_tokens"),
+        ("self_attention.linear_qkv", "self_attn.qkv_proj"),
+        ("self_attention.linear_proj", "self_attn.o_proj"),
+        (
+            "input_layernorm",
+            "input_layernorm",
+        ),
+        ("pre_mlp_layernorm", "post_attention_layernorm"),
+        ("mlp.linear_fc1", "mlp.gate_up_proj"),
+        ("mlp.linear_fc2", "mlp.down_proj"),
+        ("decoder.final_layernorm", "model.norm"),
+        ("output_layer", "lm_head"),
+    ]
+    # NOTE(shengguangming): the megatron llama may have this prefix
+    params_dict = dict(vllm_model.named_parameters())
+    for name, loaded_weight in actor_weights.items():
+        name = _replace_name(name, params_mapping)
+        if name.endswith(".bias") and name not in params_dict:
+            continue
+        if "rotary_emb.inv_freq" in name:
+            continue
+        else:
+            param = params_dict[name]
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, loaded_weight)
+
+
+def _replace_name(megatron_name, name_mapping):
+    for m_name, v_name in name_mapping:
+        if m_name not in megatron_name:
+            continue
+        if "layers" in megatron_name:  # deal with decoder layers
+            megatron_name = megatron_name.replace("decoder", "model")
+            megatron_name_list = megatron_name.split(".")
+            if "layer_norm_weight" in megatron_name_list or "layer_norm_bias" in megatron_name_list:
+                param_name_list = megatron_name_list[:3]
+                param_name_list.append(v_name)
+                param_name = ".".join(param_name_list)
+            else:
+                param_name_list = megatron_name_list[:3]
+                weight_or_bias = megatron_name_list[-1]
+                param_name_list.append(v_name)
+                param_name_list.append(weight_or_bias)
+                param_name = ".".join(param_name_list)
+            return param_name
+        else:
+            param_name = megatron_name.replace(m_name, v_name)
+            return param_name
+
+
+def mistral_megatron_weight_loader(actor_weights: Dict, vllm_model: nn.Module) -> nn.Module:
+    # TODO: need to implement a general way to deal with prefix
+    params_dict = dict(vllm_model.named_parameters())
+    for name, loaded_weight in actor_weights.items():
+        if "rotary_emb.inv_freq" in name:
+            continue
+        else:
+            param = params_dict[name]
+            weight_loader = getattr(param, "weight_loader", default_weight_loader)
+            weight_loader(param, loaded_weight)
+
+
+__LAYER_WEIGHT_MEGATRON_LOADER_REGISTRY__ = {
+    ColumnParallelLinear: parallel_weight_loader,
+    MergedColumnParallelLinear: parallel_weight_loader,
+    QKVParallelLinear: parallel_weight_loader,
+    RowParallelLinear: parallel_weight_loader,
+    VocabParallelEmbedding: parallel_weight_loader,
+    ParallelLMHead: parallel_weight_loader,
+    # "ScaledActivation.weight_loader": ScaledActivation, # TODO(shengguangming): latest commit in vllm fix awq for this function and add load_weights
+    # "default_weight_loader": default_weight_loader
+}
+
+# for layer_class, weight_loader in __LAYER_WEIGHT_MEGATRON_LOADER_REGISTRY__.items():
+#     # setattr(layer_class, 'megatron_weight_loader', weight_loader)
+#     layer_class.weight_loader = weight_loader
+
+__MODEL_MEGATRON_WEIGHT_LOADER_REGISTRY__ = {
+    "GPT2LMHeadModel": gpt2_weight_loader,
+    "LlamaForCausalLM": llama_megatron_weight_loader,  # use te backend for open-source megatron
+    "LLaMAForCausalLM": llama_megatron_weight_loader,
+    "MistralForCausalLM": mistral_megatron_weight_loader,
+}
+
+
+# the actor model is .state_dict()
+# Load megatron weights
+def load_megatron_weights(actor_weights: Dict, vllm_model: nn.Module):
+    weight_loader = _get_model_weight_loader(vllm_model.__class__.__name__)
+    weight_loader(actor_weights, vllm_model)
+    # NOTE(sgm) to reduce peak memory usage, we offload vllm model to cpu
+    # after init, and we need this after sync model weights for in first iter.
+    vllm_model = vllm_model.cuda()
+
+
+def _get_model_weight_loader(arch: str):
+    if arch in __MODEL_MEGATRON_WEIGHT_LOADER_REGISTRY__:
+        return __MODEL_MEGATRON_WEIGHT_LOADER_REGISTRY__[arch]
+    raise ValueError(f"Model architectures {arch} are not supported for now. "
+                     f"Supported architectures: {ModelRegistry.get_supported_archs()}")
+
+
+def update_megatron_weight_loader():
+    for layer_class, weight_loader in __LAYER_WEIGHT_MEGATRON_LOADER_REGISTRY__.items():
+        layer_class.weight_loader = weight_loader

verl/third_party/vllm/vllm_v_0_6_3/model_loader.py

@@ -0,0 +1,338 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/tree/main/vllm/model_executor/models
+"""Utilities for selecting and loading models."""
+from typing import Dict, Optional, Union
+
+import torch
+import torch.nn as nn
+from transformers import PreTrainedModel
+from vllm.config import CacheConfig, DeviceConfig, LoadConfig, LoRAConfig, ModelConfig, ParallelConfig, SchedulerConfig
+from vllm.distributed.communication_op import tensor_model_parallel_all_gather
+from vllm.model_executor.model_loader import BaseModelLoader
+from vllm.model_executor.model_loader.loader import _initialize_model
+from vllm.model_executor.model_loader.utils import set_default_torch_dtype
+
+from .config import LoadConfig, LoadFormat, ModelConfig
+from .dtensor_weight_loaders import load_dtensor_weights, update_dtensor_weight_loader
+from .hf_weight_loader import update_hf_weight_loader
+from .megatron_weight_loaders import load_megatron_weights, update_megatron_weight_loader
+
+
+def get_model(
+    actor_model: Union[PreTrainedModel, Dict],
+    model_config: ModelConfig,
+    load_config: LoadConfig,
+    device_config: DeviceConfig,
+    parallel_config: ParallelConfig,
+    scheduler_config: SchedulerConfig,
+    lora_config: Optional[LoRAConfig],
+    cache_config: CacheConfig = None,
+) -> nn.Module:
+    loader = get_model_loader(load_config)
+    if load_config.load_format.startswith("dummy"):
+        return loader.load_model(
+            model_config=model_config,
+            device_config=device_config,
+            lora_config=lora_config,
+            parallel_config=parallel_config,
+            scheduler_config=scheduler_config,
+            cache_config=cache_config,
+        )
+    else:
+        return loader.load_model(
+            actor_model=actor_model,
+            model_config=model_config,
+            device_config=device_config,
+            lora_config=lora_config,
+            parallel_config=parallel_config,
+            scheduler_config=scheduler_config,
+            cache_config=cache_config,
+        )
+
+
+def get_model_loader(load_config: LoadConfig) -> BaseModelLoader:
+    """Get a model loader based on the load format."""
+
+    if isinstance(load_config.load_format, type):
+        return load_config.load_format(load_config)
+
+    if load_config.load_format == LoadFormat.AUTO:
+        update_megatron_weight_loader()
+        return MegatronLoader(load_config)
+
+    # NOTE(sgm): change the weight_loader function in runtime
+    if load_config.load_format == LoadFormat.MEGATRON:
+        update_megatron_weight_loader()
+        return MegatronLoader(load_config)
+
+    if load_config.load_format == LoadFormat.HF:
+        update_hf_weight_loader()
+        return HFLoader(load_config)
+
+    if load_config.load_format == LoadFormat.DTENSOR:
+        update_dtensor_weight_loader()
+        return DTensorLoader(load_config)
+
+    if load_config.load_format == LoadFormat.DUMMY_HF:
+        update_hf_weight_loader()
+        return DummyModelLoader(load_config)
+
+    if load_config.load_format == LoadFormat.DUMMY_MEGATRON:
+        update_megatron_weight_loader()
+        return DummyModelLoader(load_config)
+
+    if load_config.load_format == LoadFormat.DUMMY_DTENSOR:
+        update_dtensor_weight_loader()
+        return DummyModelLoader(load_config)
+
+    raise ValueError("load format not supported in verl: {}, only support {} and {}".format(
+        load_config.load_format, LoadFormat.MEGATRON, LoadFormat.HF))
+
+
+class DummyModelLoader(BaseModelLoader):
+    """Model loader that will set model weights to random values."""
+
+    def __init__(self, load_config: LoadConfig):
+        super().__init__(load_config)
+        if load_config.model_loader_extra_config:
+            raise ValueError(f"Model loader extra config is not supported for "
+                             f"load format {load_config.load_format}")
+
+    def download_model(self, model_config: ModelConfig) -> None:
+        pass
+
+    def load_model(
+        self,
+        *,
+        model_config: ModelConfig,
+        device_config: DeviceConfig,
+        lora_config: Optional[LoRAConfig],
+        parallel_config: ParallelConfig,
+        scheduler_config: SchedulerConfig,
+        cache_config: CacheConfig,
+    ) -> nn.Module:
+        with set_default_torch_dtype(model_config.dtype):
+            with torch.device(device_config.device):
+                model = _initialize_model(model_config, self.load_config, lora_config, cache_config, scheduler_config)
+            # NOTE(woosuk): For accurate performance evaluation, we assign
+            # random values to the weights.
+            # initialize_dummy_weights(model)
+        return model.eval()
+
+
+class MegatronLoader(BaseModelLoader):
+    """Model loader that can load the model weights from partitioned megatron model."""
+
+    def __init__(self, load_config: LoadConfig):
+        super().__init__(load_config)
+        if load_config.model_loader_extra_config:
+            raise ValueError(f"Model loader extra config is not supported for "
+                             f"load format {load_config.load_format}")
+
+    def download_model(self, model_config: ModelConfig) -> None:
+        pass  # Nothing to download
+
+    def _get_weights_iterator(actor_model: Union[PreTrainedModel, Dict]):
+        # NOTE(shengguangming) Load the weights from the actor model
+        pass
+        # if isinstance(actor_model, nn.Module):
+        #     load_weights(actor_weights=dict(actor_model.named_parameters(remove_duplicate=False)), vllm_model=model)
+        # else:
+        #     load_weights(actor_weights=actor_model, vllm_model=model)
+        # return actor_model
+
+    def load_model(
+        self,
+        actor_model: Union[PreTrainedModel, Dict],
+        model_config: ModelConfig,
+        device_config: DeviceConfig,
+        lora_config: Optional[LoRAConfig],
+        parallel_config: ParallelConfig,
+        scheduler_config: SchedulerConfig,
+        cache_config: CacheConfig,
+    ) -> nn.Module:
+        with set_default_torch_dtype(model_config.dtype):
+            with torch.device(device_config.device):
+                model = _initialize_model(model_config, self.load_config, lora_config, cache_config, scheduler_config)
+
+            # TODO(sgm): This is a hack, we need to register the load_weight() func for each model in vllm
+            if isinstance(actor_model, nn.Module):
+                load_megatron_weights(actor_weights=dict(actor_model.named_parameters(remove_duplicate=False)),
+                                      vllm_model=model)
+            else:
+                load_megatron_weights(actor_weights=actor_model, vllm_model=model)
+
+            for _, module in model.named_modules():
+                quant_method = getattr(module, "quant_method", None)
+                if quant_method is not None:
+                    quant_method.process_weights_after_loading(module)
+                # FIXME: Remove this after Mixtral is updated
+                # to use quant_method.
+                if hasattr(module, "process_weights_after_loading"):
+                    module.process_weights_after_loading()
+        # NOTE(sgm) Some weights are point to gpu, but still need this.
+        model = model.cuda()  # NOTE (zhangchi.usc1992) We need this for vllm to profile memory usage
+        return model.eval()
+
+
+class HFLoader(BaseModelLoader):
+    """Model loader that can load the model weights from model's full params."""
+
+    def __init__(self, load_config: LoadConfig):
+        super().__init__(load_config)
+        if load_config.model_loader_extra_config:
+            raise ValueError(f"Model loader extra config is not supported for "
+                             f"load format {load_config.load_format}")
+
+    def download_model(self, model_config: ModelConfig) -> None:
+        pass  # Nothing to download
+
+    def _get_weights_iterator(self, actor_model: Union[PreTrainedModel, Dict]):
+        if isinstance(actor_model, Dict):
+            return actor_model.items()
+        elif isinstance(actor_model, nn.Module):
+            return dict(actor_model.named_parameters()).items()
+        else:
+            raise ValueError(f"actor model should be Dict or nn.Module, but get {type(actor_model)}")
+
+    def load_model(
+        self,
+        actor_model: Union[PreTrainedModel, Dict],
+        model_config: ModelConfig,
+        device_config: DeviceConfig,
+        lora_config: Optional[LoRAConfig],
+        parallel_config: ParallelConfig,
+        scheduler_config: SchedulerConfig,
+        cache_config: CacheConfig,
+    ) -> nn.Module:
+        with set_default_torch_dtype(model_config.dtype):
+            # with torch.device(device_config.device):
+            # NOTE(sgm): init the model in cpu
+            model = _initialize_model(model_config, self.load_config, lora_config, cache_config, scheduler_config)
+            model.load_weights(self._get_weights_iterator(actor_model))
+            for _, module in model.named_modules():
+                quant_method = getattr(module, "quant_method", None)
+                if quant_method is not None:
+                    quant_method.process_weights_after_loading(module)
+                # FIXME: Remove this after Mixtral is updated
+                # to use quant_method.
+                if hasattr(module, "process_weights_after_loading"):
+                    module.process_weights_after_loading()
+        # NOTE(sgm) Some weights are point to gpu, but still need this.
+        model = model.cuda()  # NOTE (zhangchi.usc1992) We need this for vllm to profile memory usage
+        return model.eval()
+
+
+class DTensorLoader(BaseModelLoader):
+    """Model loader that can load the model weights from partitioned megatron model."""
+
+    def __init__(self, load_config: LoadConfig):
+        super().__init__(load_config)
+        if load_config.model_loader_extra_config:
+            raise ValueError(f"Model loader extra config is not supported for "
+                             f"load format {load_config.load_format}")
+
+    def download_model(self, model_config: ModelConfig) -> None:
+        pass  # Nothing to download
+
+    def _get_weights_iterator(actor_model: Union[PreTrainedModel, Dict]):
+        # NOTE(shengguangming) Load the weights from the actor model
+        pass
+        # if isinstance(actor_model, nn.Module):
+        #     load_weights(actor_weights=dict(actor_model.named_parameters(remove_duplicate=False)), vllm_model=model)
+        # else:
+        #     load_weights(actor_weights=actor_model, vllm_model=model)
+        # return actor_model
+
+    def load_model(
+        self,
+        actor_model: Union[PreTrainedModel, Dict],
+        model_config: ModelConfig,
+        device_config: DeviceConfig,
+        lora_config: Optional[LoRAConfig],
+        parallel_config: ParallelConfig,
+        scheduler_config: SchedulerConfig,
+        cache_config: CacheConfig,
+    ) -> nn.Module:
+        with set_default_torch_dtype(model_config.dtype):
+            with torch.device(device_config.device):
+                model = _initialize_model(model_config, self.load_config, lora_config, cache_config, scheduler_config)
+
+            # TODO(sgm): This is a hack, we need to register the load_weight() func for each model in vllm
+            if isinstance(actor_model, nn.Module):
+                load_dtensor_weights(actor_weights=dict(actor_model.named_parameters(remove_duplicate=False)),
+                                     vllm_model=model)
+            else:
+                load_dtensor_weights(actor_weights=actor_model, vllm_model=model)
+
+            for _, module in model.named_modules():
+                quant_method = getattr(module, "quant_method", None)
+                if quant_method is not None:
+                    quant_method.process_weights_after_loading(module)
+                # FIXME: Remove this after Mixtral is updated
+                # to use quant_method.
+                if hasattr(module, "process_weights_after_loading"):
+                    module.process_weights_after_loading()
+        # NOTE(sgm) Some weights are point to gpu, but still need this.
+        model = model.cuda()  # NOTE (zhangchi.usc1992) We need this for vllm to profile memory usage
+        return model.eval()
+
+
+# FIXME(sgm): hack the _get_logits function in vllm v0.4.2
+# as they use ray, the _get_logits result will only need to return to the driver node,
+# therefore gather is enough. However, we use SPMD instead of a central scheduler,
+# all_gather is required (aligned with v0.2.6)
+def _get_logits(self, hidden_states: torch.Tensor, embedding: torch.Tensor,
+                embedding_bias: Optional[torch.Tensor]) -> torch.Tensor:
+    # Get the logits for the next tokens.
+    logits = torch.matmul(hidden_states, embedding.t())
+    if embedding_bias is not None:
+        logits += embedding_bias
+    logits = tensor_model_parallel_all_gather(logits)
+    # Remove paddings in vocab (if any).
+    if logits is not None:
+        logits = logits[:, :self.org_vocab_size]
+    return logits
+
+
+from vllm.model_executor.layers.logits_processor import LogitsProcessor
+
+
+def logitsprocessor_init(
+    self,
+    vocab_size: int,
+    org_vocab_size: Optional[int] = None,
+    scale: float = 1.0,
+    logits_as_input: bool = False,
+    soft_cap: Optional[float] = None,
+) -> None:
+    """
+    Args:
+        scale: A scaling factor to apply to the logits.
+    """
+    super(LogitsProcessor, self).__init__()
+    self.scale = scale
+    self.vocab_size = vocab_size
+    # Whether the input is logits (default is hidden states).
+    self.logits_as_input = logits_as_input
+    # original vocabulary size (without LoRA).
+    self.org_vocab_size = org_vocab_size or vocab_size
+    # Soft cap the logits. Used in Gemma 2.
+    self.soft_cap = soft_cap
+    # Whether to use gather or all-gather to gather the logits.
+    self.use_gather = False
+
+
+LogitsProcessor.__init__ = logitsprocessor_init  # use all_gather

verl/third_party/vllm/vllm_v_0_6_3/model_runner.py

@@ -0,0 +1,182 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/blob/main/vllm/worker/model_runner.py
+
+import warnings
+from enum import IntEnum
+from typing import Dict, Optional, Union
+
+import torch
+import torch.nn as nn
+import vllm.envs as envs
+from vllm.compilation.levels import CompilationLevel
+from vllm.config import (
+    CacheConfig,
+    DeviceConfig,
+    LoadConfig,
+    LoRAConfig,
+    ModelConfig,
+    ObservabilityConfig,
+    ParallelConfig,
+    PromptAdapterConfig,
+    SchedulerConfig,
+)
+from vllm.inputs import INPUT_REGISTRY, InputRegistry
+from vllm.logger import init_logger
+from vllm.lora.worker_manager import LRUCacheWorkerLoRAManager
+from vllm.model_executor.models.interfaces import supports_lora
+from vllm.multimodal import MULTIMODAL_REGISTRY, MultiModalRegistry
+from vllm.prompt_adapter.worker_manager import LRUCacheWorkerPromptAdapterManager
+from vllm.utils import DeviceMemoryProfiler, is_hip, supports_dynamo
+from vllm.worker.model_runner import ModelRunner
+
+from .config import LoadConfig, ModelConfig
+from .model_loader import get_model
+
+logger = init_logger(__name__)
+
+
+# How batches are constructed.
+class BatchType(IntEnum):
+    # Every batch is prefill.
+    PREFILL = 0
+    # Every batch is decode.
+    DECODE = 1
+    # Batch is a mixture of prefill and decode.
+    MIXED = 2
+
+
+class ModelRunner(ModelRunner):
+
+    def __init__(
+        self,
+        model: Union[nn.Module, Dict],  # [verl] model itself or its parameter dict
+        model_config: ModelConfig,
+        parallel_config: ParallelConfig,
+        scheduler_config: SchedulerConfig,
+        device_config: DeviceConfig,
+        cache_config: CacheConfig,
+        load_config: LoadConfig,
+        lora_config: Optional[LoRAConfig],
+        kv_cache_dtype: Optional[str] = "auto",
+        is_driver_worker: bool = False,
+        prompt_adapter_config: Optional[PromptAdapterConfig] = None,
+        return_hidden_states: bool = False,
+        observability_config: Optional[ObservabilityConfig] = None,
+        input_registry: InputRegistry = INPUT_REGISTRY,
+        mm_registry: MultiModalRegistry = MULTIMODAL_REGISTRY,
+    ):
+
+        super().__init__(
+            model_config,
+            parallel_config,
+            scheduler_config,
+            device_config,
+            cache_config,
+            load_config,
+            lora_config,
+            kv_cache_dtype,
+            is_driver_worker=True,  # a hack
+            prompt_adapter_config=prompt_adapter_config,
+            return_hidden_states=return_hidden_states,
+            observability_config=observability_config,
+            input_registry=input_registry,
+            mm_registry=mm_registry,
+        )
+
+        # NOTE(sgm): add for verl
+        self.model = model  # this will be replaced by get_model()
+
+    def load_model(self) -> None:
+        logger.info("Starting to load model %s...", self.model_config.model)
+        with DeviceMemoryProfiler() as m:
+            self.model = get_model(
+                self.model,
+                model_config=self.model_config,
+                device_config=self.device_config,
+                load_config=self.load_config,
+                lora_config=self.lora_config,
+                parallel_config=self.parallel_config,
+                scheduler_config=self.scheduler_config,
+                cache_config=self.cache_config,
+            )
+
+        self.model_memory_usage = m.consumed_memory
+        logger.info("Loading model weights took %.4f GB", self.model_memory_usage / float(2**30))
+
+        if self.lora_config:
+            assert supports_lora(self.model), f"{self.model.__class__.__name__} does not support LoRA yet."
+
+            if supports_multimodal(self.model):
+                logger.warning("Regarding multimodal models, vLLM currently "
+                               "only supports adding LoRA to language model.")
+            # It's necessary to distinguish between the max_position_embeddings
+            # of VLMs and LLMs.
+            if hasattr(self.model.config, "max_position_embeddings"):
+                max_pos_embeddings = self.model.config.max_position_embeddings
+            else:
+                max_pos_embeddings = self.model.config.text_config.max_position_embeddings
+
+            self.lora_manager = LRUCacheWorkerLoRAManager(
+                self.scheduler_config.max_num_seqs,
+                self.scheduler_config.max_num_batched_tokens,
+                self.vocab_size,
+                self.lora_config,
+                self.device,
+                self.model.embedding_modules,
+                self.model.embedding_padding_modules,
+                max_position_embeddings=max_pos_embeddings,
+            )
+            self.model = self.lora_manager.create_lora_manager(self.model)
+
+        if self.prompt_adapter_config:
+            self.prompt_adapter_manager = LRUCacheWorkerPromptAdapterManager(
+                self.scheduler_config.max_num_seqs,
+                self.scheduler_config.max_num_batched_tokens,
+                self.device,
+                self.prompt_adapter_config,
+            )
+            self.model = self.prompt_adapter_manager.create_prompt_adapter_manager(self.model)
+
+        if self.kv_cache_dtype == "fp8" and is_hip():
+            # Currently only ROCm accepts kv-cache scaling factors
+            # via quantization_param_path and this will be deprecated
+            # in the future.
+            if self.model_config.quantization_param_path is not None:
+                if callable(getattr(self.model, "load_kv_cache_scales", None)):
+                    warnings.warn(
+                        "Loading kv cache scaling factor from JSON is "
+                        "deprecated and will be removed. Please include "
+                        "kv cache scaling factors in the model checkpoint.",
+                        FutureWarning,
+                        stacklevel=2,
+                    )
+                    self.model.load_kv_cache_scales(self.model_config.quantization_param_path)
+                    logger.info("Loaded KV cache scaling factors from %s", self.model_config.quantization_param_path)
+                else:
+                    raise RuntimeError(
+                        "Using FP8 KV cache and scaling factors provided but "
+                        "model %s does not support loading scaling factors.",
+                        self.model.__class__,
+                    )
+            else:
+                logger.warning("Using FP8 KV cache but no scaling factors "
+                               "provided. Defaulting to scaling factors of 1.0. "
+                               "This may lead to less accurate results!")
+
+        if envs.VLLM_TORCH_COMPILE_LEVEL == CompilationLevel.DYNAMO_AS_IS and supports_dynamo():
+            from vllm.plugins import get_torch_compile_backend
+
+            backend = get_torch_compile_backend() or "eager"
+            self.model = torch.compile(self.model, fullgraph=envs.VLLM_TEST_DYNAMO_FULLGRAPH_CAPTURE, backend=backend)

verl/third_party/vllm/vllm_v_0_6_3/parallel_state.py

@@ -0,0 +1,312 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Adapted from
+# https://github.com/NVIDIA/Megatron-LM/blob/main/megatron/core/parallel_state.py
+# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
+"""Model and data parallel groups."""
+import os
+from typing import Optional
+
+import torch
+import torch.distributed
+import vllm.distributed.parallel_state as ps
+from vllm.distributed.parallel_state import (
+    get_pp_group,
+    get_world_group,
+    init_distributed_environment,
+    init_model_parallel_group,
+)
+from vllm.logger import init_logger
+
+logger = init_logger(__name__)
+"""
+This version is strongly tied with Megatron to implement HybridEngine and weight sharing between vllm and Megatron.
+- We assume the Megatron tp+dp+pp world is already established before calling this function.
+
+"""
+
+# Device mesh for using DTensor
+_DEVICE_MESH = None
+
+# Tensor model parallel group that the current rank belongs to.
+_TP = None
+# Pipeline model parallel group that the current rank belongs to.
+_PP = None
+
+
+# This method is for initializing the ParallelGroup when using HybridEngine
+def initialize_parallel_state(
+    distributed_init_method: str = "env://",
+    backend: str = "nccl",
+    tensor_model_parallel_size: int = 1,
+    num_tp_per_train_tp: int = 1,
+    pipeline_model_parallel_size: int = 1,
+):
+    # torch.distributed.all_reduce does not free the input tensor until
+    # the synchronization point. This causes the memory usage to grow
+    # as the number of all_reduce calls increases. This env var disables
+    # this behavior.
+    # Related issue:
+    # https://discuss.pytorch.org/t/cuda-allocation-lifetime-for-inputs-to-distributed-all-reduce/191573
+    os.environ["TORCH_NCCL_AVOID_RECORD_STREAMS"] = "1"
+
+    # NOTE(sgm): Modify for verl, Env vars will be set by TORCHRUN.
+    rank = int(os.getenv("RANK", "-1"))
+    local_rank = int(os.getenv("LOCAL_RANK", "0"))
+
+    # Use the world_size set by TORCHRUN
+    world_size = int(os.getenv("WORLD_SIZE", "-1"))
+    assert world_size != -1, "The world_size is set to -1, not initialized by TORCHRUN"
+    init_distributed_environment(world_size, rank, distributed_init_method, local_rank, backend)
+    if torch.distributed.get_world_size() > 1:
+        # NOTE: build a sepearate inference group with infer tp & micro dp
+        initialize_model_parallel_for_vllm(
+            tensor_model_parallel_size=tensor_model_parallel_size,
+            num_tensor_model_parallel_groups_per_train_tp=num_tp_per_train_tp,
+        )
+    else:
+        initialize_model_parallel(tensor_model_parallel_size, pipeline_model_parallel_size, backend)
+
+
+def ensure_model_parallel_initialized(
+    tensor_model_parallel_size: int,
+    pipeline_model_parallel_size: int = 1,
+    backend: Optional[str] = None,
+) -> None:
+    """Helper to initialize model parallel groups if they are not initialized,
+    or ensure tensor-parallel and pipeline-parallel sizes are equal to expected
+    values if the model parallel groups are initialized.
+    """
+    # get the backend of _DEVICE_WORLD_GROUP
+    backend = backend or torch.distributed.get_backend(get_world_group().device_group)
+    if not model_parallel_is_initialized():
+        initialize_model_parallel(tensor_model_parallel_size, pipeline_model_parallel_size, backend)
+        return
+
+    assert get_tensor_model_parallel_world_size() == tensor_model_parallel_size, (
+        "tensor parallel group already initialized, but of unexpected size: "
+        f"{get_tensor_model_parallel_world_size()=} vs. "
+        f"{tensor_model_parallel_size=}")
+    pp_world_size = get_pp_group().world_size
+    assert pp_world_size == pipeline_model_parallel_size, (
+        "pipeline parallel group already initialized, but of unexpected size: "
+        f"{pp_world_size=} vs. "
+        f"{pipeline_model_parallel_size=}")
+
+
+# TODO(sgm): deviate from the v0.5.4, not pp now
+def model_parallel_is_initialized():
+    """Check if tensor and pipeline parallel groups are initialized."""
+    return ps._TP is not None
+    # and _PIPELINE_MODEL_PARALLEL_GROUP is not None)
+
+
+def initialize_model_parallel_for_vllm(
+    tensor_model_parallel_size: int,
+    num_tensor_model_parallel_groups_per_train_tp: int = 1,
+    pipeline_model_parallel_size: int = 1,
+) -> None:
+    pass
+
+    # Get world size and rank. Ensure some consistencies.
+    assert torch.distributed.is_initialized()
+
+    assert isinstance(tensor_model_parallel_size, int)
+
+    # assert num_tensor_model_parallel_groups_per_train_tp == 1 and not different_tp_group
+    # assert num_tensor_model_parallel_groups_per_train_tp > 1 and different_tp_group
+
+    # Build the tensor model-parallel groups.
+    assert ps._TP is None, "tensor model parallel group is already initialized"
+
+    global _TP
+
+    world_size: int = torch.distributed.get_world_size()
+
+    rank = torch.distributed.get_rank()
+
+    backend = torch.distributed.get_backend()
+
+    num_tensor_model_parallel_groups = world_size // tensor_model_parallel_size
+
+    if num_tensor_model_parallel_groups_per_train_tp == 1:
+        # if tensor_model_parallel_size == train_tensor_parallel_size:
+        # using the same tp group as Megatron/vllm
+        assert _TP is None, "tensor model parallel group is already initialized"
+        group_ranks = []
+        for i in range(num_tensor_model_parallel_groups):
+            ranks = range(i * tensor_model_parallel_size, (i + 1) * tensor_model_parallel_size)
+            group_ranks.append(ranks)
+        _TP = init_model_parallel_group(
+            group_ranks=group_ranks,
+            local_rank=get_world_group().local_rank,
+            backend=backend,
+            use_custom_allreduce=False,  # TODO: check why True is not work in Ray trainer
+            use_message_queue_broadcaster=True,
+        )
+        ps._TP = _TP
+        # _MICRO_DATA_PARALLEL_GROUP is move to hybrid engine
+    else:
+        # initialize a micro_dp group and a tp group
+        # assume training tp=4, infer tp=2, then, weight is partitioned as
+        # [1], [2], [3], [4] for training and [1,2], [1,2], [3,4], [3,4] for inference
+
+        # Build the inference tp groups
+        # train_tp = train_tensor_parallel_size
+        train_tp = num_tensor_model_parallel_groups_per_train_tp * tensor_model_parallel_size
+        # num_tensor_model_parallel_groups_per_train_tp = train_tp // tensor_model_parallel_size
+        assert _TP is None, "tensor model parallel group is already initialized"
+        group_ranks = []
+        for i in range(num_tensor_model_parallel_groups // num_tensor_model_parallel_groups_per_train_tp):
+            start = train_tp * i
+            end = train_tp * (i + 1)
+            for j in range(num_tensor_model_parallel_groups_per_train_tp):
+                ranks = list(range(start, end, num_tensor_model_parallel_groups_per_train_tp))
+                for i in range(len(ranks)):
+                    ranks[i] += j
+                group_ranks.append(ranks)
+        _TP = init_model_parallel_group(
+            group_ranks=group_ranks,
+            local_rank=get_world_group().local_rank,
+            backend=backend,
+            use_custom_allreduce=False,  # TODO: check why True is not work in Ray trainer
+            use_message_queue_broadcaster=True,
+        )
+        ps._TP = _TP
+
+    # Build the pipeline model-parallel groups.
+    # global _PIPELINE_MODEL_PARALLEL_GROUP
+    # global _PIPELINE_GLOBAL_RANKS
+    # assert ps._PIPELINE_MODEL_PARALLEL_GROUP is None, ("pipeline model parallel group is already initialized")
+
+    # ps._PIPELINE_MODEL_PARALLEL_GROUP = mpu.get_pipeline_model_parallel_group()
+    # ps._PIPELINE_GLOBAL_RANKS = mpu.get_pipeline_model_parallel_ranks()
+
+    # TODO: init using device mesh (not support hybrid engine now)
+    # Build the pipeline model-parallel groups.
+    num_pipeline_model_parallel_groups: int = world_size // pipeline_model_parallel_size
+    global _PP
+    assert _PP is None, "pipeline model parallel group is already initialized"
+    group_ranks = []
+    for i in range(num_pipeline_model_parallel_groups):
+        ranks = list(range(i, world_size, num_pipeline_model_parallel_groups))
+        group_ranks.append(ranks)
+    # pipeline parallel does not need custom allreduce
+    _PP = init_model_parallel_group(group_ranks, get_world_group().local_rank, backend, use_custom_allreduce=False)
+    ps._PP = _PP  # for verl
+
+
+def initialize_model_parallel(
+    tensor_model_parallel_size: int = 1,
+    pipeline_model_parallel_size: int = 1,
+    backend: Optional[str] = None,
+) -> None:
+    """
+    NOTE: This method is a hack from the open-sourced version without
+    asertion of world_size = tp * pp
+
+    Initialize model parallel groups.
+
+    Arguments:
+        tensor_model_parallel_size: number of GPUs used for tensor model
+            parallelism.
+        pipeline_model_parallel_size: number of GPUs used for pipeline model
+            parallelism.
+
+    Let's say we have a total of 8 GPUs denoted by g0 ... g7 and we
+    use 2 GPUs to parallelize the model tensor, and 4 GPUs to parallelize
+    the model pipeline. The present function will
+    create 4 tensor model-parallel groups and 2 pipeline model-parallel groups:
+        4 tensor model-parallel groups:
+            [g0, g1], [g2, g3], [g4, g5], [g6, g7]
+        2 pipeline model-parallel groups:
+            [g0, g2, g4, g6], [g1, g3, g5, g7]
+    Note that for efficiency, the caller should make sure adjacent ranks
+    are on the same DGX box. For example if we are using 2 DGX-1 boxes
+    with a total of 16 GPUs, rank 0 to 7 belong to the first box and
+    ranks 8 to 15 belong to the second box.
+    """
+    # Get world size and rank. Ensure some consistencies.
+    assert torch.distributed.is_initialized()
+    world_size: int = torch.distributed.get_world_size()
+    backend = backend or torch.distributed.get_backend(ps.get_world_group().device_group)
+
+    # NOTE(sgm) we don't assert world_size == tp * pp
+    # DP is not managed by vllm but by the VeRL WorkerGroup
+    # if (world_size !=
+    #         tensor_model_parallel_size * pipeline_model_parallel_size):
+    #     raise RuntimeError(
+    #         f"world_size ({world_size}) is not equal to "
+    #         f"tensor_model_parallel_size ({tensor_model_parallel_size}) x "
+    #         f"pipeline_model_parallel_size ({pipeline_model_parallel_size})")
+
+    num_tensor_model_parallel_groups: int = world_size // tensor_model_parallel_size
+    rank = torch.distributed.get_rank()
+    global _TP
+    assert _TP is None, "tensor model parallel group is already initialized"
+    group_ranks = []
+    for i in range(num_tensor_model_parallel_groups):
+        ranks = list(range(i * tensor_model_parallel_size, (i + 1) * tensor_model_parallel_size))
+        group_ranks.append(ranks)
+
+    # message queue broadcaster is only used in tensor model parallel group
+    _TP = init_model_parallel_group(
+        group_ranks,
+        get_world_group().local_rank,
+        backend,
+        use_custom_allreduce=False,  # TODO: check why True is not work in Ray trainer
+        use_message_queue_broadcaster=True,
+    )
+    ps._TP = _TP
+
+    # TODO: init using device mesh (not support hybrid engine now)
+    # Build the pipeline model-parallel groups.
+    num_pipeline_model_parallel_groups: int = world_size // pipeline_model_parallel_size
+    global _PP
+    assert _PP is None, "pipeline model parallel group is already initialized"
+    group_ranks = []
+    for i in range(num_pipeline_model_parallel_groups):
+        ranks = list(range(i, world_size, num_pipeline_model_parallel_groups))
+        group_ranks.append(ranks)
+    # pipeline parallel does not need custom allreduce
+    _PP = init_model_parallel_group(group_ranks, get_world_group().local_rank, backend, use_custom_allreduce=False)
+    ps._PP = _PP  # for verl
+
+
+"""
+Device mesh utilities
+"""
+
+
+def get_device_mesh():
+    assert _DEVICE_MESH is not None, "device mesh is not initialized"
+    return _DEVICE_MESH
+
+
+"""
+Tensor model parallel utilities
+"""
+
+
+def get_tensor_model_parallel_group():
+    """Get the tensor model parallel group the caller rank belongs to."""
+    assert _TP is not None, "tensor model parallel group is not initialized"
+    return _TP.device_group
+
+
+def get_tensor_model_parallel_world_size():
+    """Return world size for the tensor model parallel group."""
+    return torch.distributed.get_world_size(group=get_tensor_model_parallel_group())
+
+
+def get_tensor_model_parallel_rank():
+    """Return my rank for the tensor model parallel group."""
+    return torch.distributed.get_rank(group=get_tensor_model_parallel_group())
+
+
+def get_tensor_model_parallel_src_rank():
+    """Calculate the global rank corresponding to the first local rank
+    in the tensor model parallel group."""
+    global_rank = torch.distributed.get_rank()
+    local_world_size = get_tensor_model_parallel_world_size()
+    return (global_rank // local_world_size) * local_world_size

verl/third_party/vllm/vllm_v_0_6_3/spmd_gpu_executor.py

@@ -0,0 +1,256 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/blob/main/vllm/executor/gpu_executor.py
+
+import os
+import socket
+from typing import Dict, List, Optional, Set, Tuple
+
+import torch
+from vllm.config import (
+    CacheConfig,
+    DeviceConfig,
+    LoRAConfig,
+    ObservabilityConfig,
+    ParallelConfig,
+    PromptAdapterConfig,
+    SchedulerConfig,
+    SpeculativeConfig,
+)
+from vllm.executor.executor_base import ExecutorAsyncBase, ExecutorBase
+from vllm.logger import init_logger
+from vllm.lora.request import LoRARequest
+from vllm.model_executor.layers.sampler import SamplerOutput
+from vllm.sequence import ExecuteModelRequest
+
+from .config import LoadConfig, ModelConfig
+
+logger = init_logger(__name__)
+
+
+class SPMDGPUExecutor(ExecutorBase):
+    """SPMD-based multi-GPU executor implementations."""
+
+    def __init__(
+        self,
+        model,  # pytorch model itself or its parameter dict
+        model_config: ModelConfig,
+        cache_config: CacheConfig,
+        parallel_config: ParallelConfig,
+        scheduler_config: SchedulerConfig,
+        device_config: DeviceConfig,
+        load_config: LoadConfig,
+        lora_config: Optional[LoRAConfig],
+        speculative_config: Optional[SpeculativeConfig],
+        prompt_adapter_config: Optional[PromptAdapterConfig],
+        observability_config: Optional[ObservabilityConfig],
+    ) -> None:
+        self.model_config = model_config
+        self.cache_config = cache_config
+        self.lora_config = lora_config
+        self.load_config = load_config
+        self.parallel_config = parallel_config
+        self.scheduler_config = scheduler_config
+        self.device_config = device_config
+        self.speculative_config = speculative_config
+        self.prompt_adapter_config = prompt_adapter_config
+        self.observability_config = observability_config
+
+        distributed_init_method = initialize_cluster(parallel_config)
+        self._init_executor(model, distributed_init_method)
+
+    # TODO(sgm): verl not support speculative decode now
+    def _init_executor(self, model, distributed_init_method) -> None:
+        assert not self.speculative_config, "Speculative decoding not yet supported for multi-GPU backend."
+
+        # Create the parallel worker for each GPU.
+        self._init_workers_sp(model, distributed_init_method)
+
+    def _init_workers_sp(self, model, distributed_init_method: str):
+        # Lazy import the Worker to avoid importing torch.cuda/xformers
+        # before CUDA_VISIBLE_DEVICES is set in the Worker
+        from .worker import Worker  # pylint: disable=import-outside-toplevel
+
+        rank = int(os.getenv("RANK"))
+        local_rank = int(os.getenv("LOCAL_RANK"))
+        print(f"local rank {local_rank}")
+
+        # see https://github.com/NVIDIA/nccl/issues/1234
+        os.environ["NCCL_CUMEM_ENABLE"] = "0"
+
+        self.worker = Worker(
+            model,
+            self.model_config,
+            self.parallel_config,
+            self.scheduler_config,
+            self.device_config,
+            self.cache_config,
+            self.load_config,
+            local_rank,
+            rank,
+            distributed_init_method,
+            lora_config=self.lora_config,
+            speculative_config=None,
+            prompt_adapter_config=self.speculative_config,
+            is_driver_worker=True,
+            model_runner_cls=None,  # use the default one
+        )
+
+        # NOTE(shengguangming): torch.distributed.init_process_group will be called inside the init_model()
+        self.worker.init_device()
+        self.worker.load_model()
+
+    def determine_num_available_blocks(self) -> Tuple[int, int]:
+        """Determine the number of available KV blocks.
+
+        This invokes `determine_num_available_blocks` on each worker and takes
+        the min of the results, guaranteeing that the selected cache sizes are
+        compatible with all workers.
+
+        Returns:
+            - tuple[num_gpu_blocks, num_cpu_blocks]
+        """
+        # Get the maximum number of blocks that can be allocated on GPU and CPU.
+        num_blocks = self.worker.determine_num_available_blocks()
+
+        # NOTE(shengguangming): Now we don't use a shared centralized controler but each process will
+        # have its own scheduler
+        num_gpu_blocks = num_blocks[0]
+        num_cpu_blocks = num_blocks[1]
+
+        return num_gpu_blocks, num_cpu_blocks
+
+    def initialize_cache(self, num_gpu_blocks: int, num_cpu_blocks: int) -> None:
+        """Initialize the KV cache in all workers."""
+
+        # NOTE: We log here to avoid multiple logs when number of workers is
+        # greater than one. We could log in the engine, but not all executors
+        # have GPUs.
+        logger.info("# GPU blocks: %d, # CPU blocks: %d", num_gpu_blocks, num_cpu_blocks)
+
+        self.cache_config.num_gpu_blocks = num_gpu_blocks
+        self.cache_config.num_cpu_blocks = num_cpu_blocks
+
+        if torch.distributed.get_rank() == 0:
+            print(
+                f"before init cache memory allocated: {torch.cuda.memory_allocated() / 1e9}GB, reserved: {torch.cuda.memory_reserved() / 1e9}GB"
+            )
+        self.worker.initialize_cache(num_gpu_blocks=num_gpu_blocks, num_cpu_blocks=num_cpu_blocks)
+        if torch.distributed.get_rank() == 0:
+            print(
+                f"after init cache memory allocated: {torch.cuda.memory_allocated() / 1e9}GB, reserved: {torch.cuda.memory_reserved() / 1e9}GB"
+            )
+
+    # NOTE(sgm): This will not profile & capture the model(CUDAGraph) when rebuilding KVCache
+    def init_cache_engine(self) -> None:
+        self.worker._init_cache_engine()
+
+    def free_cache_engine(self) -> None:
+        self.worker.free_cache_engine()
+
+    def execute_model(self, execute_model_req) -> List[SamplerOutput]:
+        all_outputs = self.worker.execute_model(execute_model_req=execute_model_req)
+
+        # NOTE(sgm):
+        # Each GPU in vllm under verl has its own spmd_gpu_executor, therefore all GPUs should return the outputs
+        # In vllm with ray, only the driver worker returns the sampling results.
+        return all_outputs
+
+    def add_lora(self, lora_request: LoRARequest) -> bool:
+        assert lora_request.lora_int_id > 0, "lora_id must be greater than 0."
+        return self.worker.add_lora(lora_request=lora_request)
+
+    def remove_lora(self, lora_id: int) -> bool:
+        assert lora_id > 0, "lora_id must be greater than 0."
+        return self.worker.remove_lora(lora_id=lora_id)
+
+    def list_loras(self) -> Set[int]:
+        return self.worker.list_loras()
+
+    def check_health(self) -> None:
+        # SPMDExecutor will always be healthy as long as
+        # it's running.
+        return
+
+    # NOTE(sgm) add for verl to pass the abstract class test, not used
+    from vllm.prompt_adapter.request import PromptAdapterRequest
+
+    def add_prompt_adapter(self, prompt_adapter_request: PromptAdapterRequest) -> bool:
+        assert prompt_adapter_request.prompt_adapter_id > 0, "prompt_adapter_id must be greater than 0."
+        return self.worker.add_prompt_adapter(prompt_adapter_request)
+
+    def list_prompt_adapters(self) -> Set[int]:
+        return self.worker.list_prompt_adapters()
+
+    def pin_lora(self, lora_id: int) -> bool:
+        assert lora_id > 0, "lora_id must be greater than 0."
+        return self.worker.pin_lora(lora_id)
+
+    def pin_prompt_adapter(self, prompt_adapter_id: int) -> bool:
+        assert prompt_adapter_id > 0, "prompt_adapter_id must be greater than 0."
+        return self.worker.pin_prompt_adapter(prompt_adapter_id)
+
+    def remove_prompt_adapter(self, prompt_adapter_id: int) -> bool:
+        assert prompt_adapter_id > 0, "prompt_adapter_id must be greater than 0."
+        return self.worker.remove_prompt_adapter(prompt_adapter_id)
+
+    # NOTE(sgm): add for verl
+    def offload_model_weights(self) -> None:
+        self.worker.offload_model_weights()
+
+    def sync_model_weights(self, actor_weights: Dict[str, torch.Tensor], load_format: str) -> None:
+        self.worker.sync_model_weights(actor_weights=actor_weights, load_format=load_format)
+
+
+def initialize_cluster(
+    parallel_config: ParallelConfig,
+    engine_use_ray: bool = False,
+    ray_address: Optional[str] = None,
+) -> Tuple[str, Optional[None]]:
+    """Initialize the distributed cluster probably with Ray.
+
+    Args:
+        parallel_config: The configurations for parallel execution.
+
+    Returns:
+        The `distributed_init_method` is the address for initializing the
+        distributed backend.
+    """
+
+    # Initialize cluster locally.
+    port = get_open_port()
+    # We need to setup the distributed init method to make sure
+    # the distributed megatron code (e.g., get world size) works correctly.
+    # distributed_init_method = f"tcp://localhost:{port}"
+    distributed_init_method = "env://"
+    return distributed_init_method
+
+
+def get_open_port():
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+        s.bind(("", 0))
+        return s.getsockname()[1]
+
+
+# TODO(sgm): not implemented async executor yet
+class SPMDGPUExecutorAsync(SPMDGPUExecutor, ExecutorAsyncBase):
+
+    async def execute_model_async(self, execute_model_req: ExecuteModelRequest) -> List[SamplerOutput]:
+        """Executes one model step on the given sequences."""
+        raise NotImplementedError
+
+    async def check_health_async(self) -> None:
+        """Checks if the executor is healthy. If not, it should raise an
+        exception."""
+        self.check_health()

verl/third_party/vllm/vllm_v_0_6_3/tokenizer.py

@@ -0,0 +1,40 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/blob/main/vllm/transformers_utils/tokenizer_group/tokenizer_group.py
+
+from typing import Optional
+
+from transformers import PreTrainedTokenizer
+from vllm.transformers_utils.tokenizer_group import TokenizerGroup
+from vllm.utils import LRUCache
+
+
+class TokenizerGroup(TokenizerGroup):
+    """A group of tokenizers that can be used for LoRA adapters."""
+
+    def __init__(self, tokenizer: PreTrainedTokenizer, enable_lora: bool, max_num_seqs: int,
+                 max_input_length: Optional[int]):
+        self.enable_lora = enable_lora
+        self.max_input_length = max_input_length
+        self.tokenizer = tokenizer
+        self.lora_tokenizers = LRUCache[PreTrainedTokenizer](capacity=max_num_seqs) if enable_lora else None
+
+    # FIXME(sgm): for simplicity, we assign the special token here
+    @property
+    def pad_token_id(self):
+        return self.tokenizer.pad_token_id
+
+    @property
+    def eos_token_id(self):
+        return self.tokenizer.eos_token_id

verl/third_party/vllm/vllm_v_0_6_3/worker.py

@@ -0,0 +1,333 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+# Copyright 2023 The vLLM team.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Adapted from https://github.com/vllm-project/vllm/blob/main/vllm/worker/worker.py
+"""A GPU worker class."""
+import gc
+import os
+from typing import Dict, List, Optional, Tuple, Type, Union
+
+import torch
+import torch.distributed
+import torch.nn as nn
+from vllm.config import (
+    CacheConfig,
+    DeviceConfig,
+    LoRAConfig,
+    ParallelConfig,
+    PromptAdapterConfig,
+    SchedulerConfig,
+    SpeculativeConfig,
+)
+
+# TODO(sgm): check why vllm has similar file in vllm.model_executor.parallel_utils.parallel_state
+from vllm.distributed import get_tensor_model_parallel_group, init_distributed_environment, set_custom_all_reduce
+from vllm.model_executor import set_random_seed
+from vllm.model_executor.layers.sampler import SamplerOutput
+from vllm.sequence import ExecuteModelRequest, IntermediateTensors
+from vllm.worker.cache_engine import CacheEngine
+from vllm.worker.embedding_model_runner import EmbeddingModelRunner
+from vllm.worker.model_runner import GPUModelRunnerBase
+from vllm.worker.model_runner_base import ModelRunnerInputBase
+from vllm.worker.worker import Worker, _check_if_gpu_supports_dtype
+from vllm.worker.worker_base import WorkerInput
+
+from .config import LoadConfig, LoadFormat, ModelConfig
+from .dtensor_weight_loaders import load_dtensor_weights
+from .hf_weight_loader import load_hf_weights
+from .megatron_weight_loaders import load_megatron_weights
+from .model_runner import ModelRunner
+from .parallel_state import ensure_model_parallel_initialized
+
+
+class Worker(Worker):
+    """A worker class that executes (a partition of) the model on a GPU.
+
+    Each worker is associated with a single GPU. The worker is responsible for
+    maintaining the KV cache and executing the model on the GPU. In case of
+    distributed inference, each worker is assigned a partition of the model.
+    """
+
+    def __init__(
+        self,
+        model: Union[nn.Module, Dict],  # model itself or its parameter dict
+        model_config: ModelConfig,
+        parallel_config: ParallelConfig,
+        scheduler_config: SchedulerConfig,
+        device_config: DeviceConfig,
+        cache_config: CacheConfig,
+        load_config: LoadConfig,
+        local_rank: int,
+        rank: int,
+        distributed_init_method: str,
+        lora_config: Optional[LoRAConfig] = None,
+        speculative_config: Optional[SpeculativeConfig] = None,
+        prompt_adapter_config: Optional[PromptAdapterConfig] = None,
+        is_driver_worker: bool = False,
+        model_runner_cls: Optional[Type[GPUModelRunnerBase]] = None,
+    ) -> None:
+        # self.model = model  # will be replaced in the init_model
+        self.model_config = model_config
+        self.parallel_config = parallel_config
+        self.parallel_config.rank = rank
+        self.scheduler_config = scheduler_config
+        self.device_config = device_config
+        self.cache_config = cache_config
+        self.local_rank = local_rank
+        self.rank = rank
+        self.distributed_init_method = distributed_init_method
+        self.lora_config = lora_config
+        self.load_config = load_config
+        self.prompt_adapter_config = prompt_adapter_config
+        self.is_driver_worker = is_driver_worker  # TODO: we don't need driver
+        # if parallel_config and is_driver_worker:
+        #     assert rank % parallel_config.tensor_parallel_size == 0, \
+        #            "Driver worker should be rank 0 of tensor parallel group."
+        if self.model_config.trust_remote_code:
+            # note: lazy import to avoid importing torch before initializing
+            from vllm.utils import init_cached_hf_modules
+
+            init_cached_hf_modules()
+
+        # Return hidden states from target model if the draft model is an
+        # mlp_speculator
+        speculative_args = (
+            {} if speculative_config is None or (speculative_config.draft_model_config.model == model_config.model) or
+            (speculative_config.draft_model_config.hf_config.model_type not in ["medusa", "mlp_speculator"]) else {
+                "return_hidden_states": True
+            })
+
+        # TODO(sgm): set correct model runner class
+        ModelRunnerClass: Type[GPUModelRunnerBase] = ModelRunner
+        if model_runner_cls is not None:
+            ModelRunnerClass = model_runner_cls
+        elif self.model_config.embedding_mode:
+            ModelRunnerClass = EmbeddingModelRunner
+        self.model_runner: GPUModelRunnerBase = ModelRunnerClass(
+            model,  # [VERL]: add for verl
+            model_config,
+            parallel_config,
+            scheduler_config,
+            device_config,
+            cache_config,
+            load_config=load_config,
+            lora_config=self.lora_config,
+            kv_cache_dtype=self.cache_config.cache_dtype,
+            is_driver_worker=is_driver_worker,
+            prompt_adapter_config=prompt_adapter_config,
+            **speculative_args,
+        )
+
+        # Uninitialized cache engine. Will be initialized by
+        # initialize_cache.
+        self.cache_engine: List[CacheEngine] = None
+        # Initialize gpu_cache as embedding models don't initialize kv_caches
+        self.gpu_cache: Optional[List[List[torch.Tensor]]] = None
+
+        # NOTE(sgm): [VERL] For offloading inference engine params
+        self.cpu_model = None
+
+    def init_device(self) -> None:
+        if self.device_config.device.type == "cuda":
+            # torch.distributed.all_reduce does not free the input tensor until
+            # the synchronization point. This causes the memory usage to grow
+            # as the number of all_reduce calls increases. This env var disables
+            # this behavior.
+            # Related issue:
+            # https://discuss.pytorch.org/t/cuda-allocation-lifetime-for-inputs-to-distributed-all-reduce/191573
+            os.environ["TORCH_NCCL_AVOID_RECORD_STREAMS"] = "1"
+
+            # NOTE(sgm): Modify for verl, Env vars will be set by TORCHRUN.
+            self.rank = self.rank if self.rank is not None else int(os.getenv("RANK", "-1"))
+            local_rank = int(os.getenv("LOCAL_RANK", "0"))
+            self.device = torch.device(f"cuda:{local_rank}")
+            if self.rank < 0:
+                raise ValueError("Invalid or unspecified rank.")
+            torch.cuda.set_device(self.device)
+
+            # Use the world_size set by TORCHRUN
+            world_size = int(os.getenv("WORLD_SIZE", "-1"))
+            assert world_size != -1, "The world_size is set to -1, not initialized by TORCHRUN"
+            self.parallel_config.world_size = world_size
+
+            _check_if_gpu_supports_dtype(self.model_config.dtype)
+            torch.cuda.empty_cache()
+            self.init_gpu_memory = torch.cuda.mem_get_info()[0]
+        else:
+            raise RuntimeError(f"Not support device type: {self.device_config.device}")
+
+        # Initialize the distributed environment.
+        init_worker_distributed_environment(self.parallel_config, self.rank, self.distributed_init_method,
+                                            self.local_rank)
+        # Set random seed.
+        set_random_seed(self.model_config.seed)
+        # self.model = get_model(actor_model=self.model, model_config=self.model_config)
+
+    @torch.inference_mode()
+    def determine_num_available_blocks(self) -> Tuple[int, int]:
+        """Profiles the peak memory usage of the model to determine how many
+        KV blocks may be allocated without OOMs.
+
+        The engine will first conduct a profiling of the existing memory usage.
+        Then, it calculate the maximum possible number of GPU and CPU blocks
+        that can be allocated with the remaining free memory.
+
+        .. tip::
+            You may limit the usage of GPU memory
+            by adjusting the `gpu_memory_utilization` parameter.
+        """
+        # Profile the memory usage of the model and get the maximum number of
+        # cache blocks that can be allocated with the remaining free memory.
+        torch.cuda.empty_cache()
+        # torch.cuda.reset_peak_memory_stats()
+
+        # Execute a forward pass with dummy inputs to profile the memory usage
+        # of the model.
+        self.model_runner.profile_run()
+
+        # Calculate the number of blocks that can be allocated with the
+        # profiled peak memory.
+        torch.cuda.synchronize()
+        free_gpu_memory, total_gpu_memory = torch.cuda.mem_get_info()
+        peak_memory = total_gpu_memory - free_gpu_memory
+
+        assert peak_memory > 0, ("Error in memory profiling. This happens when the GPU memory was "
+                                 "not properly cleaned up before initializing the vLLM instance.")
+
+        cache_block_size = self.get_cache_block_size_bytes()
+
+        # NOTE(sgm) [VERL] use the remaining memory
+        num_gpu_blocks = int((free_gpu_memory * self.cache_config.gpu_memory_utilization) // cache_block_size)
+        # num_gpu_blocks = int((total_gpu_memory * self.cache_config.gpu_memory_utilization - peak_memory) // cache_block_size)
+
+        num_cpu_blocks = int(self.cache_config.swap_space_bytes // cache_block_size)
+        num_gpu_blocks = max(num_gpu_blocks, 0)
+        num_cpu_blocks = max(num_cpu_blocks, 0)
+        if self.model_runner.lora_manager:
+            self.model_runner.remove_all_loras()
+
+        # NOTE(sgm): Add for [VERL], synchronize number of blocks with all the rank
+        num_gpu_blocks = torch.tensor([num_gpu_blocks], device="cuda")
+        num_cpu_blocks = torch.tensor([num_cpu_blocks], device="cuda")
+
+        torch.distributed.all_reduce(num_gpu_blocks,
+                                     op=torch.distributed.ReduceOp.MIN,
+                                     group=get_tensor_model_parallel_group().device_group)
+        torch.distributed.all_reduce(num_cpu_blocks,
+                                     op=torch.distributed.ReduceOp.MIN,
+                                     group=get_tensor_model_parallel_group().device_group)
+        num_gpu_blocks = num_gpu_blocks.item()
+        num_cpu_blocks = num_cpu_blocks.item()
+        gc.collect()
+        torch.cuda.empty_cache()
+        return num_gpu_blocks, num_cpu_blocks
+
+    def _init_cache_engine(self):
+        if self.cache_engine is None and self.gpu_cache is None:
+            super()._init_cache_engine()
+
+    def free_cache_engine(self):
+        # ensure `enforce_eager=True`
+        self.cache_engine = None
+        self.gpu_cache = None
+
+    # NOTE(sgm): [VERL]: adapt from _execute_model_spmd()
+    def execute_model(self,
+                      execute_model_req: ExecuteModelRequest,
+                      intermediate_tensors: Optional[IntermediateTensors] = None) -> Optional[List[SamplerOutput]]:
+        """
+        Execute model in Single Program Multiple Data (SPMD) fashion.
+        All workers take the same request, prepare the input and
+        execute the model.
+        """
+        assert execute_model_req is not None, ("_execute_model_spmd() requires each worker to take in an "
+                                               "ExecuteModelRequest")
+        worker_input: WorkerInput = self.prepare_worker_input(execute_model_req=execute_model_req)
+        model_input: ModelRunnerInputBase = self.model_runner.prepare_model_input(
+            execute_model_req.seq_group_metadata_list)
+
+        # verl.worker.workerbase.WorkerBase
+        # swap cache
+        super().execute_worker(worker_input)
+
+        # If there is no input, we don't need to execute the model.
+        if worker_input.num_seq_groups == 0:
+            return []
+
+        return self.model_runner.execute_model(
+            model_input,
+            self.kv_cache[worker_input.virtual_engine] if self.kv_cache is not None else None,
+            intermediate_tensors,
+        )
+
+    # assume the input is .state_dict()
+    def sync_model_weights(self, actor_weights: Dict, load_format: str):
+        if load_format in [LoadFormat.MEGATRON, LoadFormat.AUTO]:
+            load_megatron_weights(actor_weights, self.model_runner.model)
+        elif load_format == LoadFormat.HF:
+            # full model state dict without no sharding
+            load_hf_weights(actor_weights, self.model_runner.model)
+        elif load_format == LoadFormat.DTENSOR:
+            load_dtensor_weights(actor_weights, self.model_runner.model)
+
+    def offload_model_weights(self) -> None:
+        if self.cpu_model == None:
+            self.cpu_model = {}
+            for name, params in self.model_runner.model.named_parameters():
+                self.cpu_model[name] = torch.empty_like(params, device="cpu")
+                params.data = self.cpu_model[name]
+        else:
+            for name, params in self.model_runner.model.named_parameters():
+                params.data = self.cpu_model[name]
+
+
+def init_worker_distributed_environment(
+    parallel_config: ParallelConfig,
+    rank: int,
+    distributed_init_method: Optional[str] = "env://",
+    local_rank: int = -1,
+) -> None:
+    """Initialize the distributed environment."""
+    set_custom_all_reduce(not parallel_config.disable_custom_all_reduce)
+
+    # NOTE(sgm) use tcp://localhost:xxxx will hang in HF setting without megatron
+    init_distributed_environment(parallel_config.world_size, rank, distributed_init_method, local_rank)
+
+    ensure_model_parallel_initialized(
+        tensor_model_parallel_size=parallel_config.tensor_parallel_size,
+        pipeline_model_parallel_size=parallel_config.pipeline_parallel_size,
+    )
+
+    # TODO(sgm): check whether need this
+    # if pynccl_utils.is_initialized():
+    #     pynccl_world_size = pynccl_utils.get_world_size()
+    #     if pynccl_world_size != parallel_config.world_size:
+    #         raise RuntimeError(
+    #             "pynccl is already initialized but the pynccl world "
+    #             "size does not match parallel_config.world_size "
+    #             f"({pynccl_world_size} vs. {parallel_config.world_size}).")
+    # elif parallel_config.world_size > 1:
+    #     # NOTE(woosuk): We don't initialize pynccl process group when world size
+    #     # is 1.
+    #     # NOTE(kaichao): By default, pynccl is initialized for tp group.
+    #     pynccl_utils.init_process_group(
+    #         group=get_tensor_model_parallel_cpu_group())
+
+    # # Initialize a custom fast all-reduce implementation.
+    # if not parallel_config.disable_custom_all_reduce:
+    #     init_custom_ar()
+
+    # A small all_reduce for warmup.
+    torch.distributed.all_reduce(torch.zeros(1).cuda())
+    # if pynccl_utils.is_initialized():
+    #     pynccl_utils.all_reduce(torch.zeros(1).cuda())