[BE][DTensor] move torch.distributed._tensor import to torch.distributed.tensor in test files

[XilunWu]

Stack from ghstack (oldest at bottom):

• -> [BE][DTensor] move torch.distributed._tensor import to torch.distributed.tensor in test files #153225

cc @H-Huang @awgu @wanchaol @fegin @fduwjj @wz337 @wconstab @d4l3k

[pytorch-bot]

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❌ 1 New Failure, 1 Cancelled Job, 1 Unrelated Failure

As of commit afa1ff7 with merge base ab829ec ():

NEW FAILURE - The following job has failed:

• inductor-rocm / rocm-py3.10-inductor / test (inductor, 1, 2, linux.rocm.gpu.2) (gh)
  distributed/_composable/fsdp/test_fully_shard_state_dict.py::TestFullyShardStateDictMultiProcess::test_dp_state_dict_save_load

CANCELLED JOB - The following job was cancelled. Please retry:

• trunk / linux-jammy-rocm-py3.10 / test (default, 2, 2, linux.rocm.gpu.2) (gh)

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

• inductor / unit-test / cuda12.6-py3.10-gcc9-sm86 / test (inductor_cpp_wrapper, 1, 2, lf.ephemeral.linux.g5.4xlarge.nvidia.gpu) (gh) (#152916)
  [ FAILED ] AotInductorTest.BasicTestCuda

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[cyyever]

I'm not an expert of distributed code. @kwen2501 can help decide.

[kwen2501]

LGTM

[XilunWu]

@pytorchbot merge

[pytorchmergebot]

Merge started

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[pytorchmergebot]

Merge failed

Reason: 12 mandatory check(s) failed. The first few are:

• pull / linux-focal-py3.9-clang10-onnx / test (default, 2, 2, ephemeral.linux.2xlarge)
• pull / linux-focal-py3.9-clang10-onnx / test (default, 1, 2, ephemeral.linux.2xlarge)
• pull / linux-focal-py3.9-clang10 / test (default, 1, 5, ephemeral.linux.4xlarge)
• pull / linux-focal-py3.9-clang10 / test (default, 5, 5, ephemeral.linux.4xlarge)
• pull / linux-focal-py3.9-clang10 / test (default, 4, 5, ephemeral.linux.4xlarge)

Dig deeper by viewing the failures on hud

Details for Dev Infra team

Raised by workflow job

Failing merge rule: Core Maintainers

[XilunWu]

@pytorchbot merge -f "unrelated ROCm state dict save/load test failure on 7 devices due to uneven sharding"

[pytorchmergebot]

Merge started

Your change will be merged immediately since you used the force (-f) flag, bypassing any CI checks (ETA: 1-5 minutes). Please use -f as last resort and instead consider -i/--ignore-current to continue the merge ignoring current failures. This will allow currently pending tests to finish and report signal before the merge.

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