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[FA performance] Improve the Q matrix load stategy #3966

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mfrancepillois opened this issue Apr 18, 2025 · 1 comment · May be fixed by #3965
Open

[FA performance] Improve the Q matrix load stategy #3966

mfrancepillois opened this issue Apr 18, 2025 · 1 comment · May be fixed by #3965

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@mfrancepillois
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In the Cutlass implementation, the Q matrix is prefetched outside the loop but loaded inside the loop.
This improves FA performance by avoiding register spilling.
A similar strategy should be evaluated for FA in Triton.

@mfrancepillois
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The performance assessment of the new pass is blocked by the performance regression on FA: #4239

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