Nsight shows “GPU 0 (GeForce 940MX)” grayed out for OpenCL

Hi :)

I ran Nsight’s performance analysis on my OpenCL+OpenGL app and in the results I see this:


Here’s how I init OpenCL:

std::vector<cl::Platform> all_platforms;

auto default_platform = all_platforms[1];
cout << "Using platform: " << default_platform.getInfo<CL_PLATFORM_NAME>() << std::endl;

std::vector<cl::Device> devices;
default_platform.getDevices(CL_DEVICE_TYPE_GPU, &devices);
for (unsigned d = 0; d < devices.size(); ++d) {
    if (checkExtnAvailability(devices[d], CL_GL_SHARING_EXT)) {
        device = devices[d];
cout << "Using device: " << device.getInfo<CL_DEVICE_NAME>() << std::endl;
cl_context_properties props[] =
    CL_GL_CONTEXT_KHR,   (cl_context_properties)wglGetCurrentContext(),
    CL_WGL_HDC_KHR,     (cl_context_properties)wglGetCurrentDC(),
    CL_CONTEXT_PLATFORM, (cl_context_properties)default_platform(),
context = cl::Context(device, props);

I get this output:

Using platform: NVIDIA CUDA
Using device: GeForce 940MX

Also, I print GL’s info like this:

cout << "GL info: " << glGetString(GL_VENDOR) << "; " << glGetString(GL_VERSION) << endl;

and I get:

GL info: NVIDIA Corporation; 3.2.0 NVIDIA 411.63

Any idea what’s broken? My GeForce driver is the exact recommended version for Nsight.

Note: I do have CUDA Toolkit 10.0 installed.

We’re trying to reproduce this and will get back to you as soon as we do. (DTCOMP-2417)