Fix race condition in _block_gemv kernel#6578
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rapids-bot[bot] merged 2 commits intorapidsai:branch-25.06from Apr 26, 2025
Merged
Fix race condition in _block_gemv kernel#6578rapids-bot[bot] merged 2 commits intorapidsai:branch-25.06from
_block_gemv kernel#6578rapids-bot[bot] merged 2 commits intorapidsai:branch-25.06from
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The kernel, in order: 1. Starts a loop for every thread 2. Writes to shared memory using all threads, then syncs 3. Uses thread 0 to reduce in shared memory 4. Continues forward with the loop A sync was necessary between step 3 and 4 to ensure other threads don't continue and overwrite in shared memory while thread 0 is still reading and doing reductions. Authors: - Divye Gala (https://github.com/divyegala) Approvers: - Micka (https://github.com/lowener) URL: rapidsai#6578
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The kernel, in order:
A sync was necessary between step 3 and 4 to ensure other threads don't continue and overwrite in shared memory while thread 0 is still reading and doing reductions.