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Integrate stateful dataloader to torchtitan
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# Copyright (c) Meta Platforms, Inc. and affiliates. | ||
# All rights reserved. | ||
# | ||
# This source code is licensed under the BSD-style license found in the | ||
# LICENSE file in the root directory of this source tree. |
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# Copyright (c) Meta Platforms, Inc. and affiliates. | ||
# All rights reserved. | ||
# | ||
# This source code is licensed under the BSD-style license found in the | ||
# LICENSE file in the root directory of this source tree. | ||
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import torch | ||
from torchtitan.checkpoint import DataLoaderWrapper | ||
from torchtitan.datasets.hf_datasets import build_hf_data_loader | ||
from torchtitan.datasets.tokenizer import create_tokenizer | ||
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class TestDatasetCheckpoint: | ||
def test_c4_resumption(self): | ||
dataset_name = "c4_mini" | ||
dataset_path = "./torchtitan/datasets/c4_mini" | ||
batch_size = 1 | ||
seq_len = 1024 | ||
world_size = 4 | ||
rank = 0 | ||
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dl_wrapper = self._create_dataloader_wrapper( | ||
dataset_name, dataset_path, batch_size, seq_len, world_size, rank | ||
) | ||
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it = iter(dl_wrapper.dataloader) | ||
for _ in range(250): | ||
next(it) | ||
state = dl_wrapper.state_dict() | ||
expected_input_ids, expected_labels = next(it) | ||
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# Create new dataloader, restore checkpoint, and check if next data yielded is the same as above | ||
dl_wrapper = self._create_dataloader_wrapper( | ||
dataset_name, dataset_path, batch_size, seq_len, world_size, rank | ||
) | ||
dl_wrapper.load_state_dict(state) | ||
input_ids, labels = next(iter(dl_wrapper.dataloader)) | ||
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assert torch.equal(input_ids, expected_input_ids) | ||
assert torch.equal(labels, expected_labels) | ||
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def _create_dataloader_wrapper( | ||
self, dataset_name, dataset_path, batch_size, seq_len, world_size, rank | ||
): | ||
tokenizer_type = "tiktoken" | ||
tokenizer = create_tokenizer("tiktoken", "./test/assets/test_tiktoken.model") | ||
dataloader = build_hf_data_loader( | ||
dataset_name=dataset_name, | ||
dataset_path=dataset_path, | ||
tokenizer=tokenizer, | ||
batch_size=1, | ||
seq_len=1024, | ||
world_size=4, | ||
rank=0, | ||
) | ||
return DataLoaderWrapper(dataloader) |
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