CUDA: fix logic for clearing padding with -ngl 0 #13320
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ggml/src/ggml-cuda/mmq.cu
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| const size_t size_data = ggml_nbytes(src0); | ||
| const size_t size_alloc = ggml_backend_buffer_get_alloc_size(src0->buffer, src0); | ||
| if (size_alloc > size_data) { | ||
| CUDA_CHECK(cudaMemsetAsync((char *) src0->data + size_data, 0, size_alloc - size_data)); |
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This is missing the stream parameter.
ggml/src/ggml-cuda/mmvq.cu
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| const size_t size_data = ggml_nbytes(src0); | ||
| const size_t size_alloc = ggml_backend_buffer_get_alloc_size(src0->buffer, src0); | ||
| if (size_alloc > size_data) { | ||
| CUDA_CHECK(cudaMemsetAsync((char *) src0->data + size_data, 0, size_alloc - size_data)); |
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* origin/master: (27 commits) llama : fix build_ffn without gate (ggml-org#13336) CUDA: fix bad asserts for partial offload (ggml-org#13337) convert : qwen2/3moe : set yarn metadata if present (ggml-org#13331) CUDA: fix --split-mode row for MMQ (ggml-org#13323) gguf-py : avoid requiring pyside6 for other scripts (ggml-org#13036) CUDA: fix logic for clearing padding with -ngl 0 (ggml-org#13320) sampling : Integrate Top-nσ into main sampling chain (and add it to the server) (ggml-org#13264) server : Webui - change setText command from parent window to also send the message. (ggml-org#13309) mtmd : rename llava directory to mtmd (ggml-org#13311) clip : fix confused naming ffn_up and ffn_down (ggml-org#13290) convert : bailingmoe : set yarn metadata if present (ggml-org#13312) SYCL: Disable mul_mat kernels for noncontiguous tensor b (ggml-org#13308) mtmd : add C public API (ggml-org#13184) rpc : use backend registry, support dl backends (ggml-org#13304) ggml : activate s390x simd for Q3_K (ggml-org#13301) llava/mtmd : fixes to fully support dl backends (ggml-org#13303) llama : build windows releases with dl backends (ggml-org#13220) CUDA: fix race condition in MMQ stream-k fixup (ggml-org#13299) CUDA: fix race condition in MMQ ids_dst (ggml-org#13294) vulkan: Additional type support for unary, binary, and copy (ggml-org#13266) ...
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)" This reverts commit 9070365.
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Fixes #13305 .
The problem is that in
ggml_cuda_op_mul_matthe padding of temporary compute buffers is cleared just prior to kernel execution and when I wrote code to directly launch MMVQ and MMQ I forgot to add the corresponding functionality; this PR simply adds it. The changes in MMVQ should not actually be invoked unless the minimum number of tokens for evaluating the model on the GPU is lowered.Prior to #13199 the logic for clearing the padding was already wrong, but in a different way. Instead of not clearing padding when it ought to be, because slices of
src0were passed toggml_cuda_op_mul_matthat would cause valid tensor data to be cleared. I did not touch that logic, now thatMUL_MAT_IDcan be handled in a single kernel launch it should never be invoked (I also added an assert).