CUDA Pro Tip：Write Flexible Kernels with Grid-Stride Loops

见
CUDA Pro Tip：Write Flexible Kernels with Grid-Stride Loops
懒得翻译了，这篇文章讲使用Grid-Stride Loop
如下非Grid-Stride Loop

kernel(){    int i = blockIdx.x * blockDim.x + threadIdx.x;    if (i<n)        ....}

Grid-Stride Loop

kernel(){    for (int i = blockIdx.x * blockDim.x + threadIdx.x;          i < n;          i += blockDim.x * gridDim.x)       {          ...      }}

并表明这样做的三个有点
1. 可扩展和thread reuse
2. Debugging
3. Portability and readability

我认为吧主要就是前两个原因。