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88 lines
2.5 KiB
Python
88 lines
2.5 KiB
Python
# 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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"""
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Worker script for dataloader worker seed divergence tests.
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Verifies that dataloader workers get different random seeds across GPUs,
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so that each rank sees different random augmentations.
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Run via torchrun or accelerate launch.
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"""
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import random
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import numpy as np
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import torch
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import torch.distributed as dist
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import torch.nn as nn
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from torch.utils.data import Dataset
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from transformers import HfArgumentParser, Trainer, TrainingArguments, set_seed
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from transformers.testing_utils import torch_device
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def gather_from_all_gpus(tensor, world_size):
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gather_list = [torch.zeros_like(tensor) for _ in range(world_size)]
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dist.all_gather(gather_list, tensor)
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return gather_list
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class DummyDataset(Dataset):
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def __init__(self):
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self.length = 64
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def __len__(self):
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return self.length
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def __getitem__(self, i) -> int:
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x = random.random()
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y = np.random.random()
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z = torch.rand([]).item()
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return {"x": torch.tensor([x, y, z])}
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class DummyModel(nn.Module):
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def __init__(self):
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super().__init__()
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self.fc = nn.Linear(3, 1)
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def forward(self, x):
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local_tensor = torch.tensor(x, device=torch_device)
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gathered = gather_from_all_gpus(local_tensor, dist.get_world_size())
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assert not all(torch.allclose(t, gathered[0]) for t in gathered[1:])
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y = self.fc(x)
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return (y.mean(), y)
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def run_distributed_training(training_args):
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set_seed(42)
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model = DummyModel()
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dataset = DummyDataset()
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training_args.max_steps = 3
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# dataloader_num_workers must be > 0 to enable worker_init_fn
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training_args.dataloader_num_workers = 2
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trainer = Trainer(
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model,
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training_args,
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train_dataset=dataset,
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)
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trainer.train()
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if __name__ == "__main__":
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parser = HfArgumentParser((TrainingArguments,))
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training_args = parser.parse_args_into_dataclasses()[0]
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run_distributed_training(training_args)
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