Dump basic information about OpenCL devices in the system

opencl_device_info.cpp

// On MacOS X compile with g++ -framework OpenCL <filename>

#include <stdio.h>
#include <OpenCL/opencl.h>

#define P(x) x,#x

void printClDeviceInfoString(cl_device_id device_id, cl_device_info param_name, const char* printable_name)
{
    char val[1024];
    clGetDeviceInfo(device_id, param_name, sizeof(val), &val, NULL);
    printf("%s: %s\n", printable_name, val);
}

void printClDeviceInfoBool(cl_device_id device_id, cl_device_info param_name, const char* printable_name)
{
    cl_bool val;
    clGetDeviceInfo(device_id, param_name, sizeof(val), &val, NULL);
    printf("%s: %d\n", printable_name, val);
}

void printClDeviceInfoUint(cl_device_id device_id, cl_device_info param_name, const char* printable_name)
{
    cl_uint val;
    clGetDeviceInfo(device_id, param_name, sizeof(val), &val, NULL);
    printf("%s: %d\n", printable_name, val);
}

void printClDeviceInfoUlong(cl_device_id device_id, cl_device_info param_name, const char* printable_name)
{
    cl_ulong val;
    clGetDeviceInfo(device_id, param_name, sizeof(val), &val, NULL);
    printf("%s: %llu\n", printable_name, val);
}

int main()
{
    cl_uint max_device_ids = 32;
    cl_uint num_device_ids=0;
    cl_device_id device_ids[max_device_ids];

    clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, max_device_ids, device_ids, &num_device_ids);


    printf("clGetDeviceIDs returned %d devices\n\n", num_device_ids);

    for(cl_uint idx=0; idx<num_device_ids; ++idx)
    {
        printf("Device %d\n\n", idx);

        printClDeviceInfoString (device_ids[idx], P(CL_DEVICE_NAME));
        printClDeviceInfoString (device_ids[idx], P(CL_DEVICE_VENDOR));
        printClDeviceInfoString (device_ids[idx], P(CL_DEVICE_VERSION));
        printClDeviceInfoString (device_ids[idx], P(CL_DRIVER_VERSION));
        printClDeviceInfoString (device_ids[idx], P(CL_DEVICE_PROFILE));
        printClDeviceInfoBool   (device_ids[idx], P(CL_DEVICE_AVAILABLE));
        printClDeviceInfoBool   (device_ids[idx], P(CL_DEVICE_COMPILER_AVAILABLE));
        printClDeviceInfoUlong  (device_ids[idx], P(CL_DEVICE_GLOBAL_MEM_SIZE));
        printClDeviceInfoUlong  (device_ids[idx], P(CL_DEVICE_LOCAL_MEM_SIZE));
        printClDeviceInfoBool   (device_ids[idx], P(CL_DEVICE_IMAGE_SUPPORT));

        printf("\n");
    }

    printf("Finished\n\n");

    return 0;
}