[AUTOGENERATED] [release/2.8] [ROCm] Limit number of values per thread for reductions on three dimensions #2469
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…nsions (#2460) In the current implementation of reductions in three dimensions for AMD GPUs the number of values per thread is unbounded and can end up being in the hundreds of thousands for certain tensors. This of course is bad for performance. This patch fixes this issue by increasing the parallelism and thus lowering the number of value per thread to reasonable limits i.e. less than 2048 values per thread. The performance gains can be between 10x-17x for certain examples where the number of values per thread was originally very high. cherry-pick of pytorch#159652
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Jenkins build for 33deb83483e7827f75996182d80117661610a417 commit finished as FAILURE |
jerrymannil
approved these changes
Aug 6, 2025
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Cherry-pick of #2460