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[Kernel] GGUF MMVQ kernel for multiple input vectors #18754

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Merged
merged 5 commits into from
Jun 16, 2025
Merged

[Kernel] GGUF MMVQ kernel for multiple input vectors #18754

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cae76f8
mmvq multiple vectors
SzymonOzog May 27, 2025
4609aa0
cleanup
SzymonOzog May 27, 2025
5c2f998
Merge remote-tracking branch 'origin/main' into mmvq_multiple
SzymonOzog May 27, 2025
da62a6e
incorporate feedback
SzymonOzog May 27, 2025
251d073
fix fake shape and stride
SzymonOzog Jun 3, 2025
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47 changes: 24 additions & 23 deletions csrc/quantization/gguf/gguf_kernel.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -92,111 +92,112 @@ torch::Tensor ggml_mul_mat_vec_a8(torch::Tensor W, // quant weight
torch::Tensor X, // input
int64_t type, int64_t row) {
int col = X.sizes()[1];
int vecs = X.sizes()[0];
const int padded = (col + 512 - 1) / 512 * 512;
const at::cuda::OptionalCUDAGuard device_guard(device_of(X));
auto options = torch::TensorOptions().dtype(X.dtype()).device(W.device());
at::Tensor Y = torch::empty({1, row}, options);
at::Tensor Y = torch::empty({vecs, row}, options);
cudaStream_t stream = at::cuda::getCurrentCUDAStream().stream();
options = torch::TensorOptions().dtype(torch::kInt32).device(W.device());
at::Tensor quant_X = torch::empty({1, padded / 32 * 9}, options);
at::Tensor quant_X = torch::empty({vecs, padded / 32 * 9}, options);
VLLM_DISPATCH_FLOATING_TYPES(X.scalar_type(), "ggml_mul_mat_vec_a8", [&] {
quantize_row_q8_1_cuda<scalar_t>((scalar_t*)X.data_ptr(),
(void*)quant_X.data_ptr(), col, 1, stream);
quantize_row_q8_1_cuda<scalar_t>(
(scalar_t*)X.data_ptr(), (void*)quant_X.data_ptr(), col, vecs, stream);
switch (type) {
case 2:
mul_mat_vec_q4_0_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 3:
mul_mat_vec_q4_1_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 6:
mul_mat_vec_q5_0_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 7:
mul_mat_vec_q5_1_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 8:
mul_mat_vec_q8_0_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 10:
mul_mat_vec_q2_K_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 11:
mul_mat_vec_q3_K_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 12:
mul_mat_vec_q4_K_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 13:
mul_mat_vec_q5_K_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 14:
mul_mat_vec_q6_K_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 16:
mul_mat_vec_iq2_xxs_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 17:
mul_mat_vec_iq2_xs_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 18:
mul_mat_vec_iq3_xxs_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 19:
mul_mat_vec_iq1_s_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 20:
mul_mat_vec_iq4_nl_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 21:
mul_mat_vec_iq3_s_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 22:
mul_mat_vec_iq2_s_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 23:
mul_mat_vec_iq4_xs_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
case 29:
mul_mat_vec_iq1_m_q8_1_cuda<scalar_t>(
(void*)W.data_ptr(), (void*)quant_X.data_ptr(),
(scalar_t*)Y.data_ptr(), col, row, stream);
(scalar_t*)Y.data_ptr(), col, row, vecs, stream);
break;
}
});
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