Initial steps toward a torch.utils.data.IterableDataset (PR 3 of N) #6
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(to enable testing on #6)
* add GHA workflows; remove temp exclusion from pre-commit config * GHA tweak, attempt to trigger PR runs --------- Co-authored-by: Ryan Williams <[email protected]>
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Most of the way through, couple q's here, and suggested changes in #15!
src/tiledbsoma_ml/pytorch.py
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| assert self._var_joinids is not None | ||
| world_size, _ = _get_distributed_world_rank() | ||
| n_workers, _ = _get_worker_world_rank() | ||
| partition_len = len(self._obs_joinids) // world_size // n_workers |
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Will some partitions be one greater than others, if this division has remainders? Does it matter?
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Yes, they can vary across data loader workers. And it doesn't really matter. What matters the most is having the same number of samples distributed to each GPU. Beyond that, things are data and config dependent.
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…rse_output__batched`
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This PR adds a simple
torch.utils.data.IterableDatasetandtorchdata.datapipes.iter.IterDataPipeimplementation. An initial set of tests is included.Notes to reviewer:
torch.distributedvariants of world and rank.dataloaderconvenience API - that will come in a later PR