Question

blockIdx.x和blockDim.x，二者有什么区别，用法呢？

const int tid = threadIdx.x; const int row = blockIdx.x; int i, j; for(i = tid; i < n; i += blockDim.x) { data[i] = a[row * lda + i]; }[/code]代码上面有i += blockDim.x，i=tid,也就是threadIdx.x。那么i += blockDim.x 是什么意思？这里有些不懂

Answer 1

const int tid = threadIdx.x;const int row = blockIdx.x; int i, j; for(i = tid; i <陪桐御轮卜 n; i += blockDim.x) { data[i] = a[row * lda + i]; }[/芦岩code]