69 lines
2.3 KiB
Python
69 lines
2.3 KiB
Python
#!/usr/bin/env python
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# Copyright 2024 The HuggingFace Team. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from accelerate.commands.utils import CustomArgumentParser
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from accelerate.utils import merge_fsdp_weights
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description = """Utility to merge the weights from multiple FSDP checkpoints into a single combined checkpoint. Should be used if
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`SHARDED_STATE_DICT` was used for the model. Weights will be saved to `{output_path}`.
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This is a CPU-bound process and requires enough RAM to load the entire model state dict."""
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def merge_command(args):
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merge_fsdp_weights(
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args.checkpoint_directory, args.output_path, not args.unsafe_serialization, args.remove_checkpoint_dir
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)
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def merge_command_parser(subparsers=None):
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if subparsers is not None:
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parser = subparsers.add_parser("merge-weights", description=description)
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else:
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parser = CustomArgumentParser(description=description)
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parser.add_argument("checkpoint_directory", type=str, help="A directory containing sharded weights saved by FSDP.")
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parser.add_argument(
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"output_path",
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type=str,
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help="The path to save the merged weights. Defaults to the current directory. ",
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)
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parser.add_argument(
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"--unsafe_serialization",
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action="store_true",
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default=False,
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help="Whether to save the merged weights as `.bin` rather than `.safetensors` (not recommended).",
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)
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parser.add_argument(
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"--remove_checkpoint_dir",
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action="store_true",
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help="Whether to remove the checkpoint directory after merging.",
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default=False,
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)
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if subparsers is not None:
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parser.set_defaults(func=merge_command)
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return parser
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def main():
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parser = merge_command_parser()
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args = parser.parse_args()
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merge_command(args)
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if __name__ == "__main__":
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main()
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