Disable UCC CommunicationTests

[wujingyue]

No description provided.

[wujingyue]

!test

[github-actions]

Description

• Disabled UCC CommunicationTests due to segfault

• Commented out UCC backend in test instantiation

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Changes walkthrough 📝

	Relevant files
Bug fix	test_multidevice_communications.cpp Disable UCC in CommunicationTests                                                tests/cpp/test_multidevice_communications.cpp Commented out UCC backend in CommunicatorBackend Values Added detailed comment about the segfault encountered with UCC +37/-1

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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🧪 No relevant tests

⚡ Recommended focus areas for review Segfault The PR disables UCC CommunicationTests due to a segfault. It is important to investigate the root cause of the segfault to determine if it can be resolved or if UCC should remain disabled. // testing::Values(CommunicatorBackend::kNccl, CommunicatorBackend::kUcc), // // UCC triggered the following segfault in CI: // // clang-format off // 00:00:18 [1,0]<stdout>:[ RUN ] CommunicationTest.Gather/UCC // 00:00:18 [1,1]<stderr>:[7859fcd3f8f9:338 :0:338] Caught signal 11 (Segmentation fault: address not mapped to object at address 0x55b7566aaf90) // 00:00:18 [1,1]<stderr>:==== backtrace (tid: 338) ==== // 00:00:18 [1,1]<stderr>: 0 /opt/hpcx/ucx/lib/libucs.so.0(ucs_handle_error+0x2e4) [0x7f558fbc8654] // 00:00:18 [1,1]<stderr>: 1 /opt/hpcx/ucx/lib/libucs.so.0(+0x3684c) [0x7f558fbc884c] // 00:00:18 [1,1]<stderr>: 2 /opt/hpcx/ucx/lib/libucs.so.0(+0x36a88) [0x7f558fbc8a88] // 00:00:18 [1,1]<stderr>: 3 /usr/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x7f558fc47330] // 00:00:18 [1,1]<stderr>: 4 /opt/hpcx/ucc/lib/ucc/libucc_tl_ucp.so(+0x2ece8) [0x7f5443fa5ce8] // 00:00:18 [1,1]<stderr>: 5 /opt/hpcx/ucc/lib/ucc/libucc_tl_ucp.so(ucc_tl_ucp_allreduce_knomial_progress+0x573) [0x7f5443fa7123] // 00:00:18 [1,1]<stderr>: 6 /opt/hpcx/ucc/lib/ucc/libucc_tl_ucp.so(ucc_tl_ucp_allreduce_knomial_start+0x1bd) [0x7f5443fa57fd] // 00:00:18 [1,1]<stderr>: 7 /opt/hpcx/ucc/lib/ucc/libucc_tl_ucp.so(ucc_tl_ucp_service_allreduce+0x267) [0x7f5443f88357] // 00:00:18 [1,1]<stderr>: 8 /opt/hpcx/ucc/lib/libucc.so.1(ucc_service_allreduce+0x107) [0x7f558fb69ee7] // 00:00:18 [1,1]<stderr>: 9 /opt/hpcx/ucc/lib/libucc.so.1(ucc_team_create_test_single+0x8f5) [0x7f558fb66455] // 00:00:18 [1,1]<stderr>:10 /usr/local/lib/python3.12/dist-packages/torch/lib/libtorch_cuda.so(+0xd9a498) [0x7f5591a05498] // 00:00:18 [1,1]<stderr>:11 /usr/local/lib/python3.12/dist-packages/torch/lib/libtorch_cuda.so(_ZN4c10d15ProcessGroupUCC8initCommEN3c106DeviceE+0x388) [0x7f5591a0c248] // 00:00:18 [1,1]<stderr>:12 /usr/local/lib/python3.12/dist-packages/torch/lib/libtorch_cuda.so(_ZN4c10d15ProcessGroupUCC6gatherERSt6vectorIS1_IN2at6TensorESaIS3_EESaIS5_EERS5_RKNS_13GatherOptionsE+0x73) [0x7f5591a15463] // 00:00:18 [1,1]<stderr>:13 bin/test_multidevice(+0x6b81e5) [0x55b4f38871e5] // 00:00:18 [1,1]<stderr>:14 bin/test_multidevice(+0x6b9ba6) [0x55b4f3888ba6] // 00:00:18 [1,1]<stderr>:15 bin/test_multidevice(+0xa84aec) [0x55b4f3c53aec] // 00:00:18 [1,1]<stderr>:16 bin/test_multidevice(+0xb90d51) [0x55b4f3d5fd51] // 00:00:18 [1,1]<stderr>:17 bin/test_multidevice(+0xb77f5a) [0x55b4f3d46f5a] // 00:00:18 [1,1]<stderr>:18 bin/test_multidevice(+0xb78512) [0x55b4f3d47512] // 00:00:18 [1,1]<stderr>:19 bin/test_multidevice(+0xb78b51) [0x55b4f3d47b51] // 00:00:18 [1,1]<stderr>:20 bin/test_multidevice(+0xb866fa) [0x55b4f3d556fa] // 00:00:18 [1,1]<stderr>:21 bin/test_multidevice(+0xb78d4a) [0x55b4f3d47d4a] // 00:00:18 [1,1]<stderr>:22 bin/test_multidevice(+0x192edb) [0x55b4f3361edb] // 00:00:18 [1,1]<stderr>:23 /usr/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x7f558fc2c1ca] // 00:00:18 [1,1]<stderr>:24 /usr/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x7f558fc2c28b] // 00:00:18 [1,1]<stderr>:25 bin/test_multidevice(+0x19cae5) [0x55b4f336bae5] // 00:00:18 [1,1]<stderr>:================================= // clang-format on testing::Values(CommunicatorBackend::kNccl),