识别amd gpus

Question

我很难区分不同的gpus。这是我的代码，据我所知，它应该返回不同的总线/设备/函数号，但是对于所有的gpus，我得到的都是相同的。任何帮助都将不胜感激。

int main()
{

    cl_platform_id* platformIDs = nullptr;
    cl_uint platformCount = 0;
    clGetPlatformIDs(0, nullptr, &platformCount);
    platformIDs = new cl_platform_id[platformCount];
    clGetPlatformIDs(platformCount, platformIDs, nullptr);

    for (cl_uint i = 0; i < platformCount; i++)
    {
        cl_uint deviceCount;
        clGetDeviceIDs(platformIDs[i], CL_DEVICE_TYPE_GPU, 0, nullptr, &deviceCount);
        cl_device_id* deviceIDs = new cl_device_id[deviceCount];
        clGetDeviceIDs(platformIDs[i], CL_DEVICE_TYPE_GPU, deviceCount, deviceIDs, nullptr);

        for (cl_uint j = 0; j < deviceCount; j++)
        {
            cl_device_topology_amd amdtopo;
            cl_int clret = clGetDeviceInfo(deviceIDs[j], CL_DEVICE_TOPOLOGY_AMD, sizeof(amdtopo), &amdtopo, nullptr);

            std::cout << "platform=" << i << "; device=" << j << "; ";
            if (clret == CL_SUCCESS)
            {
                if (amdtopo.raw.type == CL_DEVICE_TOPOLOGY_TYPE_PCIE_AMD)
                {
                    std::cout <<
                        "bus=" << (int)amdtopo.pcie.bus <<
                        "; device=" << (int)amdtopo.pcie.device <<
                        "; function=" << (int)amdtopo.pcie.function <<
                        ";";
                }
                else
                {
                    std::cout << "not amd";
                }
            }
            else
            {
                std::cout << "error";
            }

            std::cout << "\n";
        }
    }
}

这是我在机器上获得的12个和gpus的输出：

C:\Users\x>gpuid.exe
platform=0; device=0; error
platform=1; device=0; bus=0; device=0; function=1;
platform=1; device=1; bus=0; device=0; function=1;
platform=1; device=2; bus=0; device=0; function=1;
platform=1; device=3; bus=0; device=0; function=1;
platform=1; device=4; bus=0; device=0; function=1;
platform=1; device=5; bus=0; device=0; function=1;
platform=1; device=6; bus=0; device=0; function=1;
platform=1; device=7; bus=0; device=0; function=1;
platform=1; device=8; bus=0; device=0; function=1;
platform=1; device=9; bus=0; device=0; function=1;
platform=1; device=10; bus=0; device=0; function=1;
platform=1; device=11; bus=0; device=0; function=1;

Answer 1

在最近的和驱动程序中发现了一个bug：https://community.amd.com/thread/224200