Initial commit

verl/workers/sharding_manager/__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.
+
+from verl.utils.import_utils import is_vllm_available, is_megatron_core_available
+
+from .base import BaseShardingManager
+from .fsdp_ulysses import FSDPUlyssesShardingManager
+
+AllGatherPPModel = None
+
+if is_megatron_core_available() and is_vllm_available():
+    from .megatron_vllm import AllGatherPPModel, MegatronVLLMShardingManager
+elif AllGatherPPModel is not None:
+    pass
+else:
+    AllGatherPPModel = None
+    MegatronVLLMShardingManager = None
+
+if is_vllm_available():
+    from .fsdp_vllm import FSDPVLLMShardingManager
+else:
+    FSDPVLLMShardingManager = None