Question

不确定找到GPU最大可用线程数的最佳方法是什么。我有以下代码：

int deviceCount, device;
int gpuDeviceCount = 0;
struct cudaDeviceProp properties;
cudaError_t cudaResultCode = cudaGetDeviceCount(&deviceCount);
if (cudaResultCode != cudaSuccess)
    deviceCount = 0;
/* machines with no GPUs can still report one emulation device */
for (device = 0; device < deviceCount; ++device) {
    cudaGetDeviceProperties(&properties, device);
    if (properties.major != 9999) /* 9999 means emulation only */
    if (device==0)
    {
            printf("multiProcessorCount %d\n",properties.multiProcessorCount);
            printf("maxThreadsPerMultiProcessor %d\n",properties.maxThreadsPerMultiProcessor);
    }
}

返回：

multiProcessorCount 14
maxThreadsPerMultiProcessor 1536

事实证明总数是14 * 1536 = 21504。我觉得它太小了（我有特斯拉M2070）。

Answer 1

您的检查方式是正确的。您可以查看NVIDIA cuda SDK示例，SDK中的“设备查询”示例定义好

如何在CUDA中找到最大可用线程数？

1 个答案: