关于GPU一些疑问

[hu123rong00]

__global__ static void ThreadDemo1(unsigned int* ret)

{

unsigned int xIndex = blockDim.x * blockIdx.x + threadIdx.x;

unsigned int yIndex = blockDim.y * blockIdx.y + threadIdx.y;



if(xIndex < size_x && yIndex < size_y)

{

unsigned int index = xIndex + size_x * yIndex;

ret[index] = xIndex;

ret[index + size_x*size_y] = yIndex;

}

}

上面xIndex和yIndex他们具体是怎么来的，我现在开始学始终弄不明白block和threa是怎么工作的，谢谢各位了

[无心人_过过小日子]

基础的基础,建议LZ仔细阅读一遍<<编程手册>>.