小编Gau*_*rav的帖子

我有这样的代码:

for(int i =0; i<2; i++)
{
    //initialization of memory and some variables
    ........
    ........
    RunDll(input image, output image); //function that calls kernel
}

上述循环中的每次迭代都是独立的.我想同时运行它们.所以,我试过这个:

for(int i =0; i<num_devices; i++)
{
    cudaSetDevice(i);
    //initialization of memory and some variables
    ........
    ........
    RunDll(input image, output image); 
    {
        RunBasicFBP_CUDA(parameters); //function that calls kernel 1

        xSegmentMetal(parameters); //CPU function

        RunBasicFP_CUDA(parameters);  //function that uses output of kernel 1 as input for kernel 2

        for (int idx_view = 0; idx_view < param.fbp.num_view; idx_view++)
        {
            for (int idx_bin …