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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* gpu_sim_check.c
*
* Check that GPU simulation agrees with CPU version
*
* Copyright © 2012-2020 Deutsches Elektronen-Synchrotron DESY,
* a research centre of the Helmholtz Association.
*
* Authors:
* 2012-2019 Thomas White <taw@physics.org>
*
* This file is part of CrystFEL.
*
* CrystFEL is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* CrystFEL 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CrystFEL. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdlib.h>
#include <stdio.h>
#ifdef HAVE_CLOCK_GETTIME
#include <time.h>
#else
#include <sys/time.h>
#endif
#define CL_TARGET_OPENCL_VERSION 220
#include "../src/diffraction.h"
#include "../src/diffraction-gpu.h"
#include "../src/cl-utils.h"
#include <datatemplate.h>
#include <utils.h>
#include <image.h>
#include <symmetry.h>
#include <cell-utils.h>
#ifdef HAVE_CLOCK_GETTIME
static double get_hires_seconds()
{
struct timespec tp;
clock_gettime(CLOCK_MONOTONIC, &tp);
return (double)tp.tv_sec + ((double)tp.tv_nsec/1e9);
}
#else
/* Fallback version of the above. The time according to gettimeofday() is not
* monotonic, so measuring intervals based on it will screw up if there's a
* timezone change (e.g. daylight savings) while the program is running. */
static double get_hires_seconds()
{
struct timeval tp;
gettimeofday(&tp, NULL);
return (double)tp.tv_sec + ((double)tp.tv_usec/1e6);
}
#endif
int main(int argc, char *argv[])
{
struct gpu_context *gctx;
struct image *gpu_image;
struct image *cpu_image;
DataTemplate *dtempl;
UnitCell *cell;
UnitCell *cell_raw;
int i;
double gpu_min, gpu_max, gpu_tot;
double cpu_min, cpu_max, cpu_tot;
double dev, perc;
double start, end;
double gpu_time, cpu_time;
SymOpList *sym;
gsl_rng *rng;
if ( have_gpu_device() == 0 ) {
ERROR("No GPU device found - skipping test.\n");
return 0;
}
rng = gsl_rng_alloc(gsl_rng_mt19937);
gctx = setup_gpu(1, NULL, NULL, NULL, 0);
if ( gctx == NULL ) {
ERROR("Couldn't set up GPU.\n");
return 1;
}
cell_raw = cell_new_from_parameters(28.1e-9, 28.1e-9, 16.5e-9,
deg2rad(90.0), deg2rad(90.0), deg2rad(120.0));
cell = cell_rotate(cell_raw, random_quaternion(rng));
dtempl = data_template_new_from_file(argv[1]);
if ( dtempl == NULL ) return 1;
cpu_image = image_create_for_simulation(dtempl);
gpu_image = image_create_for_simulation(dtempl);
start = get_hires_seconds();
if ( get_diffraction_gpu(gctx, gpu_image, 8, 8, 8, cell, 0, 0, 10) ) {
return 1;
}
end = get_hires_seconds();
gpu_time = end - start;
sym = get_pointgroup("1");
cpu_image->dp = malloc(cpu_image->detgeom->n_panels * sizeof(float *));
if ( cpu_image->dp == NULL ) {
ERROR("Couldn't allocate memory for result.\n");
return 1;
}
for ( i=0; i<cpu_image->detgeom->n_panels; i++ ) {
struct detgeom_panel *p = &cpu_image->detgeom->panels[i];
cpu_image->dp[i] = calloc(p->w * p->h, sizeof(float));
if ( cpu_image->dp[i] == NULL ) {
ERROR("Couldn't allocate memory for panel %i\n", i);
return 1;
}
}
start = get_hires_seconds();
get_diffraction(cpu_image, 8, 8, 8, NULL, NULL, NULL, cell,
GRADIENT_MOSAIC, sym, 0, 0, 10);
end = get_hires_seconds();
cpu_time = end - start;
free_symoplist(sym);
STATUS("The GPU version was %5.2f times faster.\n", cpu_time/gpu_time);
gpu_min = +INFINITY; gpu_max = -INFINITY; gpu_tot = 0.0;
cpu_min = +INFINITY; cpu_max = -INFINITY; cpu_tot = 0.0;
dev = 0.0;
for ( i=0; i<cpu_image->detgeom->n_panels; i++ ) {
int j;
struct detgeom_panel *p = &cpu_image->detgeom->panels[i];
for ( j=0; j<p->w*p->h; j++ ) {
const double cpu = cpu_image->dp[i][j];
const double gpu = gpu_image->dp[i][j];
if ( cpu > cpu_max ) cpu_max = cpu;
if ( cpu < cpu_min ) cpu_min = cpu;
if ( gpu > gpu_max ) gpu_max = gpu;
if ( gpu < gpu_min ) gpu_min = gpu;
gpu_tot += gpu;
cpu_tot += cpu;
dev += fabs(gpu - cpu);
}
}
perc = 100.0*dev/cpu_tot;
STATUS("GPU: min=%8e, max=%8e, total=%8e\n", gpu_min, gpu_max, gpu_tot);
STATUS("CPU: min=%8e, max=%8e, total=%8e\n", cpu_min, cpu_max, cpu_tot);
STATUS("dev = %8e (%5.2f%% of CPU total)\n", dev, perc);
if ( perc > 1.2 ) {
STATUS("Test failed! I'm writing cpu-sim.h5 and gpu-sim.h5"
" for you to inspect.\n");
image_write(cpu_image, dtempl, "cpu-sim.h5");
image_write(gpu_image, dtempl, "gpu-sim.h5");
return 1;
}
gsl_rng_free(rng);
cell_free(cell);
image_free(cpu_image);
image_free(gpu_image);
data_template_free(dtempl);
return 0;
}
|
