diff options
Diffstat (limited to 'ggml-cuda.cu')
| -rw-r--r-- | ggml-cuda.cu | 42 |
1 files changed, 31 insertions, 11 deletions
diff --git a/ggml-cuda.cu b/ggml-cuda.cu index ec41e35..fd36f17 100644 --- a/ggml-cuda.cu +++ b/ggml-cuda.cu @@ -208,6 +208,7 @@ typedef struct { static_assert(sizeof(block_q6_K) == sizeof(ggml_fp16_t) + 13*QK_K/16, "wrong q6_K block size/padding"); #define WARP_SIZE 32 +#define MATRIX_ROW_PADDING 256 // last row of quant. matrices is a multiple of this to avoid out-of-bounds memory accesses #define CUDA_ADD_BLOCK_SIZE 256 #define CUDA_MUL_BLOCK_SIZE 256 @@ -1171,7 +1172,7 @@ static __device__ void convert_f16(const void * vx, const int ib, const int iqs, v.y = x[ib + iqs + 1]; } -static __global__ void quantize_q8_1(const float * __restrict__ x, void * __restrict__ vy, const int k) { +static __global__ void quantize_q8_1(const float * __restrict__ x, void * __restrict__ vy, const int ndata, const int k) { const int i = blockDim.x*blockIdx.x + threadIdx.x; if (i >= k) { @@ -1180,10 +1181,10 @@ static __global__ void quantize_q8_1(const float * __restrict__ x, void * __rest block_q8_1 * y = (block_q8_1 *) vy; - const int ib = i / QK8_0; // block index - const int iqs = i % QK8_0; // quant index + const int ib = i / QK8_1; // block index + const int iqs = i % QK8_1; // quant index - const float xi = x[i]; + const float xi = i < ndata ? x[i] : 0.0f; float amax = fabsf(xi); float sum = xi; @@ -1714,9 +1715,9 @@ static void rms_norm_f32_cuda(const float * x, float * dst, const int ncols, con rms_norm_f32<<<nrows, block_dims, 0, stream>>>(x, dst, ncols); } -static void quantize_row_q8_1_cuda(const float * x, void * vy, const int k, cudaStream_t stream) { +static void quantize_row_q8_1_cuda(const float * x, void * vy, const int ndata, const int k, cudaStream_t stream) { const int num_blocks = (k + CUDA_QUANTIZE_BLOCK_SIZE - 1) / CUDA_QUANTIZE_BLOCK_SIZE; - quantize_q8_1<<<num_blocks, CUDA_QUANTIZE_BLOCK_SIZE, 0, stream>>>(x, vy, k); + quantize_q8_1<<<num_blocks, CUDA_QUANTIZE_BLOCK_SIZE, 0, stream>>>(x, vy, ndata, k); } static void dequantize_row_q4_0_cuda(const void * vx, float * y, const int k, cudaStream_t stream) { @@ -2359,9 +2360,11 @@ inline void ggml_cuda_op_mul_mat_vec( #endif if (use_mul_mat_vec_q) { + int64_t padded_row_size = ne00 + MATRIX_ROW_PADDING - 1; + padded_row_size -= padded_row_size % MATRIX_ROW_PADDING; size_t as; - void * src1_q8_1 = ggml_cuda_pool_malloc(ne00*sizeof(block_q8_1)/QK8_1, &as); - quantize_row_q8_1_cuda(src1_ddf_i, src1_q8_1, ne00, cudaStream_main); + void * src1_q8_1 = ggml_cuda_pool_malloc(padded_row_size*sizeof(block_q8_1)/QK8_1, &as); + quantize_row_q8_1_cuda(src1_ddf_i, src1_q8_1, ne00, padded_row_size, cudaStream_main); switch (src0->type) { case GGML_TYPE_Q4_0: @@ -3105,7 +3108,11 @@ void ggml_cuda_nop(const ggml_tensor * src0, const ggml_tensor * src1, ggml_tens void ggml_cuda_transform_tensor(void * data, struct ggml_tensor * tensor) { int nrows = ggml_nrows(tensor); + + const int64_t ne0 = tensor->ne[0]; + const size_t nb1 = tensor->nb[1]; + ggml_backend backend = tensor->backend; struct ggml_tensor_extra_gpu * extra = new struct ggml_tensor_extra_gpu; memset(extra, 0, sizeof(*extra)); @@ -3134,11 +3141,24 @@ void ggml_cuda_transform_tensor(void * data, struct ggml_tensor * tensor) { int64_t nrows_split = row_high - row_low; const size_t offset_split = row_low*nb1; - const size_t size = ggml_nbytes_split(tensor, nrows_split); + size_t size = ggml_nbytes_split(tensor, nrows_split); + const size_t original_size = size; + + // pad last row to a multiple of 256 elements to avoid out-of-bounds memory accesses + if (ne0 % MATRIX_ROW_PADDING != 0) { + size += (MATRIX_ROW_PADDING - ne0 % MATRIX_ROW_PADDING) + * ggml_type_size(tensor->type)/ggml_blck_size(tensor->type); + } - void * buf; + char * buf; CUDA_CHECK(cudaMalloc(&buf, size)); - void * buf_host = (char*)data + offset_split; + char * buf_host = (char*)data + offset_split; + + // set padding to 0 to avoid possible NaN values + if (size > original_size) { + CUDA_CHECK(cudaMemset(buf + original_size, 0, size - original_size)); + } + cudaMemcpy(buf, buf_host, size, cudaMemcpyHostToDevice); |