CODEWITHSUNDEEP
javawindowsopencllwjgl
Ari
Ari

Reputation: 1470

CPU is not listet as a device using Windows

My intend is to Benchmark the difference between CPU and GPU. The problem is, I am only able to retreive my GPUs, my CPU is not showing up.

This program produces correct output on OSX. There, the CPU as well as the GPUs are listed:

public static void displayInfo() {

    for (int platformIndex = 0; platformIndex < CLPlatform.getPlatforms().size(); platformIndex++) {
        CLPlatform platform = CLPlatform.getPlatforms().get(platformIndex);
        
        System.out.println("Platform #" + platformIndex + ":" + platform.getInfoString(CL_PLATFORM_NAME));

        List<CLDevice> devices = platform.getDevices(CL_DEVICE_TYPE_ALL);
        for (int deviceIndex = 0; deviceIndex < devices.size(); deviceIndex++) {
            CLDevice device = devices.get(deviceIndex);
            System.out.printf(Locale.ENGLISH, "Device #%d(%s):%s\n",
                    deviceIndex,
                    UtilCL.getDeviceType(device.getInfoInt(CL_DEVICE_TYPE)),
                    device.getInfoString(CL_DEVICE_NAME));
        }
    }
}

My output:

Platform #0:NVIDIA CUDA

Device #0(GPU):GeForce GTX 560 Ti

Device #1(GPU):GeForce GTX 560 Ti

My PC:

I am using lwjgl version 2.8.4

Why am I not able to retreive my CPU?

Upvotes: 1

Views: 84

Answers (1)

jprice
jprice

Reputation: 9925

(re-posting answer from comment)

OS X is somewhat unique in the fact that it comes with OpenCL CPU drivers pre-installed, so OpenCL works 'out-of-the-box'. On Windows and Linux, you need to install an OpenCL runtime/driver for your CPU. For Intel CPUs, you can find them here:

https://software.intel.com/en-us/articles/opencl-drivers

Upvotes: 1

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