starpu-max/tests/perfmodels/opencl_memset_01.c

/* StarPU --- Runtime system for heterogeneous multicore architectures.
 *
 * Copyright (C) 2012-2020  Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria
 *
 * StarPU is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * StarPU is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * See the GNU Lesser General Public License in COPYING.LGPL for more details.
 */

#include <starpu.h>

/*
 * Enqueue an OpenCL kernel which just does a memset
 */

extern struct starpu_opencl_program opencl_program;

void memset0_opencl(void *buffers[], void *args)
{
    (void) args;
    int id, devid;
    cl_int err;
    cl_kernel kernel;
    cl_command_queue queue;

    /* length of the vector */
    unsigned n = STARPU_VECTOR_GET_NX(buffers[0]);
    /* OpenCL copy of the vector pointer */

    cl_mem val = (cl_mem)STARPU_VECTOR_GET_DEV_HANDLE(buffers[0]);

    id = starpu_worker_get_id_check();
    devid = starpu_worker_get_devid(id);

    err = starpu_opencl_load_kernel(&kernel, &queue, &opencl_program, "_memset0_opencl", devid);

    if (err != CL_SUCCESS) STARPU_OPENCL_REPORT_ERROR(err);

    err = clSetKernelArg(kernel, 0, sizeof(val), &val);
    err|= clSetKernelArg(kernel, 1, sizeof(n), &n);
    if (err)
        STARPU_OPENCL_REPORT_ERROR(err);

    {
        size_t global=n;
        size_t local;
        size_t s;
        cl_device_id device;

        starpu_opencl_get_device(devid, &device);

        err = clGetKernelWorkGroupInfo (kernel, device, CL_KERNEL_WORK_GROUP_SIZE, sizeof(local), &local, &s);
        if (err != CL_SUCCESS) STARPU_OPENCL_REPORT_ERROR(err);
        if (local > global) local=global;

        err = clEnqueueNDRangeKernel(queue, kernel, 1, NULL, &global, &local, 0, NULL, NULL);
        if (err != CL_SUCCESS) STARPU_OPENCL_REPORT_ERROR(err);
    }
    starpu_opencl_release_kernel(kernel);

}

void memset_opencl(void *buffers[], void *args)
{
    (void) args;
    int id, devid;
    cl_int err;
    cl_kernel kernel;
    cl_command_queue queue;

    /* length of the vector */
    unsigned n = STARPU_VECTOR_GET_NX(buffers[0]);
    /* OpenCL copy of the vector pointer */

    cl_mem val = (cl_mem)STARPU_VECTOR_GET_DEV_HANDLE(buffers[0]);

    id = starpu_worker_get_id_check();
    devid = starpu_worker_get_devid(id);

    err = starpu_opencl_load_kernel(&kernel, &queue, &opencl_program, "_memset_opencl", devid);

    if (err != CL_SUCCESS) STARPU_OPENCL_REPORT_ERROR(err);

    err = clSetKernelArg(kernel, 0, sizeof(val), &val);
    err|= clSetKernelArg(kernel, 1, sizeof(n), &n);
    if (err)
        STARPU_OPENCL_REPORT_ERROR(err);

    {
        size_t global=n;
        size_t local;
        size_t s;
        cl_device_id device;

        starpu_opencl_get_device(devid, &device);

        err = clGetKernelWorkGroupInfo (kernel, device, CL_KERNEL_WORK_GROUP_SIZE, sizeof(local), &local, &s);
        if (err != CL_SUCCESS) STARPU_OPENCL_REPORT_ERROR(err);
        if (local > global) local=global;

        err = clEnqueueNDRangeKernel(queue, kernel, 1, NULL, &global, &local, 0, NULL, NULL);
        if (err != CL_SUCCESS) STARPU_OPENCL_REPORT_ERROR(err);
    }
    starpu_opencl_release_kernel(kernel);

}