Initial commit

verl/models/weight_loader_registry.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.
+
+
+def get_weight_loader(arch: str):
+    from verl.models.llama.megatron.checkpoint_utils.llama_loader import load_state_dict_to_megatron_llama
+    _MODEL_WEIGHT_MEGATRON_LOADER_REGISTRY = {'LlamaForCausalLM': load_state_dict_to_megatron_llama}
+
+    if arch in _MODEL_WEIGHT_MEGATRON_LOADER_REGISTRY:
+        return _MODEL_WEIGHT_MEGATRON_LOADER_REGISTRY[arch]
+    raise ValueError(f"Model architectures {arch} are not supported for now. "
+                     f"Supported architectures: {_MODEL_WEIGHT_MEGATRON_LOADER_REGISTRY.keys()}")