[ROCm] Fix warp and lane calculation in blockReduceSum #3321
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dllehr-amd
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Mar 11, 2024
WoosukKwon
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@kliuae Thanks for submitting the PR!
@dllehr-amd Thanks for the review!
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The fix in #3262 has addressed the issue of blockReduceSum using 32-thread warps in architecture supporting 64 as warp size. However, discrepancies were found in generation results before and after the fix, and the layernorm unit test unfortunately didn't pass on ROCm.
This PR adds fixes to these issues. It's been tested on MI210 and passes the layernorm unit test.