From 32fa459ed7c812c79e847145004061f21b7ac0d9 Mon Sep 17 00:00:00 2001 From: Tim Dettmers Date: Tue, 26 Jul 2022 18:15:51 -0700 Subject: Added col_ampere outlier extraction kernel. --- csrc/kernels.cu | 40 ++++++++++++++++++++++------------------ 1 file changed, 22 insertions(+), 18 deletions(-) (limited to 'csrc/kernels.cu') diff --git a/csrc/kernels.cu b/csrc/kernels.cu index bb36d9b..79ad5de 100644 --- a/csrc/kernels.cu +++ b/csrc/kernels.cu @@ -2626,28 +2626,32 @@ template __global__ void kExtractOutliers(char *A, int *idx, char * offset += tile_offset_rows + tile_offset_cols; - - char val = 0; - //printf("(%i (%i %i) (%i %i))\n", offset, tile_offset_rows, tile_offset_cols, row, local_colidx); - if(offset > tiledColsA*tiledRowsA) - printf("(%i (%i %i) (%i %i)\n", offset, tile_offset_rows, tile_offset_cols, row, local_colidx); - else - val = A[offset]; + char val = A[offset]; int out_idx = (row*idx_size) + blockIdx.x; - - //if(out_idx > colsA*idx_size) - if(val != 0) - { - //printf("(%i %i) = (%i) = %i\n", row, local_colidx, out_idx, (int) val); - out[out_idx] = val; - } - else - { - out[out_idx] = val; - } + out[out_idx] = val; } + } + else if(FORMAT == COL_AMPERE) + { + for(int row = threadIdx.x; row < rowsA; row+= blockDim.x) + { + // we got 32x32 tiles and we use the magic equation from the cublasLt doc to get the element + // within each tile. + int offset_per_col_tile = ((rowsA+31)/32)*32*32; + int tile_offset_rows = (row/32)*32*32; + int tile_offset_cols = (local_colidx/32)*offset_per_col_tile; + int subtile_col_idx = local_colidx%32; + int subtile_row_idx = row % 32; + // this magic is taken from the cublasLt doc (search for COL32) + int offset = (((subtile_row_idx%8)/2*4+subtile_row_idx/8)*2+subtile_row_idx%2)*32+subtile_col_idx; + offset += tile_offset_cols + tile_offset_rows; + + char val = A[offset]; + int out_idx = (row*idx_size) + blockIdx.x; + out[out_idx] = val; + } } } -- cgit v1.2.3