1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2010 Centre National de la Recherche Scientifique
* Copyright (C) 2010 Institut National de Recherche en Informatique et Automatique
* Copyright (C) 2011 Université de Bordeaux 1
*
* 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.
*/
/*
* This example complements vector_scale.c: here we implement a OpenCL version.
*/
#include <starpu.h>
#include <starpu_opencl.h>
extern struct starpu_opencl_program opencl_program;
void scal_opencl_func(void *buffers[], void *_args)
{
float *factor = _args;
int id, devid;
cl_int err;
cl_kernel kernel;
cl_command_queue queue;
cl_event event;
/* 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();
devid = starpu_worker_get_devid(id);
err = starpu_opencl_load_kernel(&kernel, &queue, &opencl_program, "vector_mult_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);
err |= clSetKernelArg(kernel, 2, sizeof(*factor), factor);
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, &event);
if (err != CL_SUCCESS) STARPU_OPENCL_REPORT_ERROR(err);
}
clFinish(queue);
starpu_opencl_collect_stats(event);
clReleaseEvent(event);
starpu_opencl_release_kernel(kernel);
}
|
