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Now this kernel has been verified and integrated into vllm-xpu-kernels, which brings large e2e performance improvement (llama3.1 8B). |
each work group handles whole group query heads and packing group query heads into single MMA call
Query heads packed for single MMA call Limitations: GQA group size <= DPAS max repeat count (8) Signed-off-by: Wuxun Zhang <wuxun.zhang@intel.com>
Signed-off-by: Wuxun Zhang <wuxun.zhang@intel.com>
Signed-off-by: Wuxun Zhang <wuxun.zhang@intel.com>
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Signed-off-by: Wuxun Zhang <wuxun.zhang@intel.com>
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Description
This PR aims to add new split reduction kernel (splitKV) for flash attention which benefits for long context length scenario.
Note: Codes are not cleaned but ready for testing.
What's newly added in this PR
XeFMHAFwdSplitKVKernelReduceSplitKXeReduceSplitKTileSchedulerLimitation
Type
Testing
Performance
References
Fixes #
Checklist