[c10d] Working async version of AllGather, test fix and compiler warnings, and CI#10932
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teng-li wants to merge 2 commits intopytorch:masterfrom
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[c10d] Working async version of AllGather, test fix and compiler warnings, and CI#10932teng-li wants to merge 2 commits intopytorch:masterfrom
teng-li wants to merge 2 commits intopytorch:masterfrom
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Looking at the code, was it the test case not allocating enough memory for the output tensors? |
pietern
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Aug 28, 2018
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@pietern The biggest issue was that each big tensor (flattened) should be on a different GPU, that was causing the error. |
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…nd CI (pytorch#10932) Summary: The previous NCCL all gather doesn't work as expected. This is a fully working async version. Tested on both C++ and Python Frontend. Multi-node: ``` tengli@learnfair042:~/new_pytorch/pytorch/torch/lib/build/c10d/test$ TMPFILE="/private/home/tengli/temp/tengli-test" RANK=0 WORLD_SIZE=2 ./ProcessGroupNCCLTest Multi-node world size: 2 rank: 0 Allreduce test successful Broadcast test successful Reduce test successful Allgather test successful tengli@learnfair117:~/new_pytorch/pytorch/torch/lib/build/c10d/test$ TMPFILE="/private/home/tengli/temp/tengli-test" RANK=1 WORLD_SIZE=2 ./ProcessGroupNCCLTest Multi-node world size: 2 rank: 1 Allreduce test successful Broadcast test successful Reduce test successful Allgather test successful ``` CI test: ``` test_set_get (__main__.FileStoreTest) ... ok test_set_get (__main__.PrefixFileStoreTest) ... ok test_set_get (__main__.PrefixTCPStoreTest) ... ok test_allreduce_ops (__main__.ProcessGroupGlooTest) ... ok test_broadcast_ops (__main__.ProcessGroupGlooTest) ... ok test_allgather_ops (__main__.ProcessGroupNCCLTest) ... ok test_allreduce_ops (__main__.ProcessGroupNCCLTest) ... ok test_broadcast_ops (__main__.ProcessGroupNCCLTest) ... ok test_reduce_ops (__main__.ProcessGroupNCCLTest) ... ok test_common_errors (__main__.RendezvousFileTest) ... ok test_nominal (__main__.RendezvousFileTest) ... ok test_common_errors (__main__.RendezvousTCPTest) ... ok test_nominal (__main__.RendezvousTCPTest) ... ok test_unknown_handler (__main__.RendezvousTest) ... ok test_set_get (__main__.TCPStoreTest) ... ok ``` Pull Request resolved: pytorch#10932 Differential Revision: D9542067 Pulled By: teng-li fbshipit-source-id: 25513eddcc3119fd736875d69dfb631b10f4ac86
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The previous NCCL all gather doesn't work as expected. This is a fully working async version. Tested on both C++ and Python Frontend.
Multi-node:
CI test: