Move allgather_coalesced implementation from Python to C++ #29059
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This pull request was exported from Phabricator. Differential Revision: D18277097 |
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#29059 caused a broken build due to unimplemented function in MPI backend. Fixed here. |
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Summary: Pull Request resolved: pytorch#29059 This is a resubmit of reverted diff D18209289 ( PR pytorch#28857 ). Test Plan: buck test caffe2/test:c10d buck test caffe2/test:distributed_gloo Reviewed By: pietern Differential Revision: D18277097 fbshipit-source-id: 3e16c4c5f71e5c051ffef280e021bd253caf127c
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This pull request has been merged in 23695ab. |
| store = c10d.FileStore(self.file_name, self.world_size) | ||
| pg = c10d.ProcessGroupGloo(store, self.rank, self.world_size, self.opts()) | ||
| dummy_input = [torch.Tensor([1])] | ||
| dummy_input = [torch.zeros([1], dtype=torch.float32)] |
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sorry -- why are these not translated exactly?
torch.Tensor([1]) is torch.ones([1]), not zeros, right?
also same with the line below, why did that change from -1 to 0?
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This only tests error handling, so they underlying values here should not be important (all_gather_coalesced never copies anything in this function). I am happy to change it back if you prefer
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| inline void assertSameDevice( | ||
| std::function<void(const std::string&)> fn, | ||
| const at::ArrayRef<at::Tensor>& tensors) { |
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don't we have a TensorList for this? (Also I wouldn't expect const reference to it, it's trivial to copy).
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ah, a good point. I was trying to be consistent with the other functions in this module mostly use const reference to ArrayRef, and not TensorList (TensorList = ArrayRef).
Actually, I just need to verify tensors in a vector, so I might just accept a const ref to a vector.
Would you prefer that?
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Summary:
Pull Request resolved: #29059
Resubmit of reverted PR #28857.
Differential Revision: D18277097