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HIP: broaden MoE ncols_opt tile heuristic on RDNA3.5 architecture #28935

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Merged
IMbackK merged 1 commit into from
Sep 16, 2026
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HIP: broaden MoE ncols_opt tile heuristic on RDNA3.5 architecture #28935

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2 changes: 1 addition & 1 deletion ggml/src/ggml-cuda/mmq.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -247,7 +247,7 @@ void ggml_cuda_mul_mat_q(
// Each expert only sees ne12*n_expert_used/ne02 tokens on average.
// On RDNA3 and RDNA4 it is faster to pick the tile size against this value instead of ne12.
int64_t ncols_opt = ne12;
if (GGML_CUDA_CC_IS_RDNA3_0(cc) || GGML_CUDA_CC_IS_RDNA4(cc)) {
if (GGML_CUDA_CC_IS_RDNA3(cc) || GGML_CUDA_CC_IS_RDNA4(cc)) {
ncols_opt = (ne12*n_expert_used + ne02 - 1) / ne02;
}

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