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Commits on Oct 15, 2019

• Check `group_size` in collectives is a positive integer.

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• Add support for min and max in CollectiveReduce.

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• Disable flaky `c_api_test_gpu`.

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Commits on Oct 14, 2019

• Make collective group resolution more robust to async misconfigurations.

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Commits on Oct 7, 2019

• Raise the exception raised by subprocess in multi-process runner.

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Commits on Sep 16, 2019

• Do not repack gradients if number of gradients is less than number of packs.

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Commits on Sep 13, 2019

• Do not block inside NCCL OpKernel when computing all-sum.

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Commits on Sep 11, 2019

• Enable ncclAllReduce with MultiWorkerMirroredStrategy for batch all reduce when

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Commits on Sep 9, 2019

• Annotate alignment bytes in scoped allocator as initialized.

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Commits on Sep 4, 2019

• Do not get input dtype from graph properties if input is rewritten.

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Commits on Aug 29, 2019

• Fix msan use-of-uninitialized-value warning in collective_ops_test.

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Commits on Aug 27, 2019

• Switch from all_reduce_merge_scope to num_packs; generate single pack.

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Commits on Aug 26, 2019

• Make collective op's communication_hint arg case insensitive.

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• Delay allocation of backing tensor in ScopedAllocator; fix interaction of SA

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Commits on Aug 21, 2019

• Add DT_HALF to collective executor.

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Commits on Aug 15, 2019

• Check both output name and output slot in duplicate scope id sanity check.

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Commits on Aug 14, 2019

• Change LOG(WARNING) to VLOG(2).

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• Ensure that an error is returned if a collective op runs with int32 on GPU.

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Commits on Aug 13, 2019

• Replace unneeded TODO with clarification comment.

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• Add tests for collective ops + scoped allocator in while loop.

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• Add a `communication_hint` argument to collective ops.

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Commits on Aug 9, 2019

• Automated rollback of commit c9552455ab76ec1b4c15bcac5aa53b85b7463175

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• Automated rollback of commit 11a5d679a4da5cda405a66f267368ee45fa980c7

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• Temporarily revert to using non-NCCL broadcast and all-gather.

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Commits on Aug 7, 2019

• Set source rank for multi-node NCCL broadcast collectives.

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• Return error if inputs to a collective instance do not have the same shape.

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Commits on Aug 5, 2019

• Share ownership of `UnboundedWorkQueue` between collective executor and

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Commits on Aug 3, 2019

• Fix a race between destructor and `Schedule` in `UnboundedWorkQueue`.

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• Configure `NcclGather` in collective param resolution.

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Commits on Aug 2, 2019

• Add a collective all-gather implementation using NCCL.

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• Temporarily disable flaky test.

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Commits on Aug 1, 2019

• Convert LOG(INFO) to VLOG in `AutoShard` optimizer.

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• Add a collective broadcast implementation using NCCL.

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• Move GPU-only collective ops Python tests to a separate file.

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Commits on Jul 31, 2019

• Add a CollectiveOps python test that calls ncclAllReduce.

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