diff options
Diffstat (limited to 'nerv/lib/matrix/generic/cukernel.cu')
| -rw-r--r-- | nerv/lib/matrix/generic/cukernel.cu | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/nerv/lib/matrix/generic/cukernel.cu b/nerv/lib/matrix/generic/cukernel.cu index d042d48..e58c488 100644 --- a/nerv/lib/matrix/generic/cukernel.cu +++ b/nerv/lib/matrix/generic/cukernel.cu @@ -225,14 +225,18 @@ __global__ void cudak_(clip)(MATRIX_ELEM *a, a[j + i * stride] = val_1; } +#ifdef __NERV_FUTURE_CUDA_7 __global__ void cudak_(update_select_rows)(MATRIX_ELEM *c, const MATRIX_ELEM *a, const MATRIX_ELEM *idx, int nrow_a, int ncol_a, int stride_c, int stride_a, double alpha, double beta) { int j = blockIdx.x * blockDim.x + threadIdx.x; int i = blockIdx.y * blockDim.y + threadIdx.y; if (i >= nrow_a || j >= ncol_a) return; int i_c = lrintf(idx[i]); - c[j + i_c * stride_c] = c[j + i_c * stride_c] * (1 - beta * alpha) + a[j + i * stride_a] * alpha; + //critical: i_c could conflict among threads(same index in the idx array), so atomicAdd is used + //c[j + i_c * stride_c] = c[j + i_c * stride_c] * (1 - beta * alpha) + a[j + i * stride_a] * alpha; + atomicAdd_nvidia(c + j + i_c * stride_c, c[j + i_c * stride_c] * (- beta * alpha) + a[j + i * stride_a] * alpha); } +#endif __global__ void cudak_(expand_frm)(const MATRIX_ELEM *a, MATRIX_ELEM *b, int nrow, int ncol, @@ -550,6 +554,7 @@ extern "C" { cudaStreamSynchronize(0); } +#ifdef __NERV_FUTURE_CUDA_7 void cudak_(cuda_update_select_rows)(Matrix *c, const Matrix *a, const Matrix *idx, double alpha, double beta) { dim3 threadsPerBlock(CUDA_THREADS_N, CUDA_THREADS_N); dim3 numBlocks(CEIL_DIV(a->ncol, threadsPerBlock.x), @@ -560,6 +565,7 @@ extern "C" { a->stride / sizeof(MATRIX_ELEM), alpha, beta); cudaStreamSynchronize(0); } +#endif void cudak_(cuda_expand_frm)(const Matrix *a, Matrix *b, int context) { dim3 threadsPerBlock(CUDA_THREADS_N, CUDA_THREADS_N); |