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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2009, 2010-2011, 2013-2015 Université de Bordeaux
* Copyright (C) 2010, 2011, 2012, 2013, 2014 CNRS
* Copyright (C) 2012 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.
*/
/*
* This is a small example of a C++ program using starpu. We here just
* increment two values of a vector several times.
*/
#include <starpu.h>
#define FPRINTF(ofile, fmt, ...) do { if (!getenv("STARPU_SSILENT")) {fprintf(ofile, fmt, ## __VA_ARGS__); }} while(0)
#ifdef STARPU_USE_CUDA
extern "C" void cuda_codelet(void *descr[], __attribute__ ((unused)) void *_args);
#endif
#ifdef STARPU_USE_OPENCL
extern "C" void opencl_codelet(void *descr[], __attribute__ ((unused)) void *_args);
struct starpu_opencl_program opencl_program;
#endif
extern "C" void cpu_codelet(void *descr[], __attribute__ ((unused)) void *_args)
{
float *val = (float *)STARPU_VECTOR_GET_PTR(descr[0]);
val[0] += 1.0f;
val[1] += 1.0f;
}
int main(int argc, char **argv)
{
int ret = 0;
starpu_data_handle_t float_array_handle;
float float_array[4] __attribute__ ((aligned (16))) = { 0.0f, 0.0f, 0.0f, 0.0f};
struct starpu_codelet cl;
unsigned i;
unsigned niter = 50;
ret = starpu_init(NULL);
if (ret == -ENODEV) return 77;
STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
starpu_vector_data_register(&float_array_handle, STARPU_MAIN_RAM, (uintptr_t)&float_array, 4, sizeof(float));
#ifdef STARPU_USE_OPENCL
ret = starpu_opencl_load_opencl_from_file("examples/incrementer/incrementer_kernels_opencl_kernel.cl", &opencl_program, NULL);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_opencl_load_opencl_from_file");
#endif
starpu_codelet_init(&cl);
cl.cpu_funcs[0] = cpu_codelet;
cl.cpu_funcs_name[0] = "cpu_codelet";
#ifdef STARPU_USE_CUDA
cl.cuda_funcs[0] = cuda_codelet;
cl.cuda_flags[0] = STARPU_CUDA_ASYNC;
#endif
#ifdef STARPU_USE_OPENCL
cl.opencl_funcs[0] = opencl_codelet;
cl.opencl_flags[0] = STARPU_OPENCL_ASYNC;
#endif
cl.nbuffers = 1;
cl.modes[0] = STARPU_RW;
cl.name = "incrementer";
for (i = 0; i < niter; i++)
{
ret = starpu_task_insert(&cl,
STARPU_RW, float_array_handle,
STARPU_TAG_ONLY, (starpu_tag_t) i,
0);
if (STARPU_UNLIKELY(ret == -ENODEV))
{
FPRINTF(stderr, "No worker may execute this task\n");
exit(77);
}
}
starpu_task_wait_for_all();
/* update the array in RAM */
starpu_data_unregister(float_array_handle);
FPRINTF(stderr, "array -> %f, %f, %f, %f\n", float_array[0],
float_array[1], float_array[2], float_array[3]);
#ifdef STARPU_USE_OPENCL
ret = starpu_opencl_unload_opencl(&opencl_program);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_opencl_unload_opencl");
#endif
starpu_shutdown();
if (float_array[0] != niter || float_array[0] != float_array[1] + float_array[2] + float_array[3])
{
FPRINTF(stderr, "Incorrect result\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
|
