[None][fix] Better error message for mismatched MPI world size#11294
[None][fix] Better error message for mismatched MPI world size#11294jthomson04 wants to merge 2 commits intoNVIDIA:mainfrom
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📝 WalkthroughWalkthroughAdded runtime validation in MPIDist initialization to ensure that the MPI world size encompasses the requested mapping.world_size when ENABLE_MULTI_DEVICE is True. Raises RuntimeError if the mapping exceeds available MPI world capacity, preventing creation of invalid sub-communicators. Changes
Estimated code review effort🎯 2 (Simple) | ⏱️ ~8 minutes 🚥 Pre-merge checks | ✅ 1 | ❌ 2❌ Failed checks (2 warnings)
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Signed-off-by: jthomson04 <jwillthomson19@gmail.com>
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PR_Github #34922 [ run ] triggered by Bot. Commit: |
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Summary by CodeRabbit
If the mpi world size TRTLLM launches into is smaller than the
tensor_parallel_size, you get a segfault like this:This MR checks the MPI world size in advance to provide a clearer error message.
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