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SYCL: TILE for quantized KV decode #26689

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Merged
ggerganov merged 1 commit into from
Aug 28, 2026
Merged

SYCL: TILE for quantized KV decode #26689

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6 changes: 5 additions & 1 deletion ggml/src/ggml-sycl/fattn.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -104,7 +104,6 @@ enum best_fattn_kernel {


static best_fattn_kernel ggml_sycl_get_best_fattn_kernel(const int device, const ggml_tensor * dst) {
GGML_UNUSED(device);
#ifndef SYCL_FLASH_ATTN
GGML_UNUSED(dst);
return BEST_FATTN_KERNEL_NONE;
Expand Down Expand Up @@ -263,6 +262,11 @@ static best_fattn_kernel ggml_sycl_get_best_fattn_kernel(const int device, const
}
} else {
if (Q->ne[1] <= 2) {
// TILE is faster for quantized KV decode on Xe2 (BMG); keep VEC on untested archs
const gpu_arch arch = ggml_sycl_info().devices[device].hw_info.arch;
if (arch == gpu_arch::intel_gpu_bmg_g21 || arch == gpu_arch::intel_gpu_bmg_g31) {
return BEST_FATTN_KERNEL_TILE;
}
return BEST_FATTN_KERNEL_VEC;
}
}
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