ver4a/llama.cpp
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CUDA: FA support for Deepseek (Ampere or newer) (#13306)

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* CUDA: FA support for Deepseek (Ampere or newer)

* do loop unrolling via C++ template
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Johannes Gäßler 2025-05-09 13:34:58 +02:00 • committed by GitHub
parent 27ebfcacba
commit 0cf6725e9f
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GPG key ID: B5690EEEBB952194
33 changed files with 852 additions and 547 deletions
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12
ggml/src/ggml-cuda/ggml-cuda.cu
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@ -3215,16 +3215,16 @@ static bool ggml_backend_cuda_device_supports_op(ggml_backend_dev_t dev, const g
return false;
#endif // FLASH_ATTN_AVAILABLE
if (op->src[1]->ne[0] != op->src[2]->ne[0]) {
// different head sizes of K and V are not supported yet
return false;
const int cc = ggml_cuda_info().devices[dev_ctx->device].cc;
if (!new_mma_available(cc) || cc < GGML_CUDA_CC_AMPERE) {
return false;
}
const int gqa_ratio = op->src[0]->ne[2] / op->src[1]->ne[2];
return op->src[1]->ne[0] == 576 && op->src[2]->ne[0] == 512 && op->src[3] && gqa_ratio % 16 == 0;
}
if (op->src[0]->ne[0] == 192) {
return false;
}
if (op->src[0]->ne[0] == 576) {
// DeepSeek MLA
return false;
}
if (op->src[0]->ne[3] != 1) {
return false;
}