2 * Copyright © 2011 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Chris Wilson <chris@chris-wilson.co.uk>
37 #include <sys/ioctl.h>
40 #include "ioctl_wrappers.h"
43 #define OBJECT_SIZE 16384
45 static void do_gem_read(int fd, uint32_t handle, void *buf, int len, int loops)
48 gem_read(fd, handle, 0, buf, len);
51 static double elapsed(const struct timeval *start,
52 const struct timeval *end,
55 return (1e6*(end->tv_sec - start->tv_sec) + (end->tv_usec - start->tv_usec))/loop;
58 static const char *bytes_per_sec(char *buf, double v)
60 const char *order[] = {
69 while (v > 1000 && o[1]) {
73 sprintf(buf, "%.1f%s/s", v, *o);
81 int main(int argc, char **argv)
95 igt_subtest_init(argc, argv);
96 igt_skip_on_simulation();
98 if (argc > 1 && atoi(argv[1]))
99 object_size = atoi(argv[1]);
100 if (object_size == 0)
101 object_size = OBJECT_SIZE;
102 object_size = (object_size + 3) & -4;
107 dst = gem_create(fd, object_size);
108 src = malloc(object_size);
111 igt_subtest("normal") {
112 for (count = 1; count <= 1<<17; count <<= 1) {
113 struct timeval start, end;
115 gettimeofday(&start, NULL);
116 do_gem_read(fd, dst, src, object_size, count);
117 gettimeofday(&end, NULL);
118 igt_info("Time to pread %d bytes x %6d: %7.3fµs, %s\n",
120 elapsed(&start, &end, count),
121 bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
126 for (c = cache; c->level != -1; c++) {
127 igt_subtest(c->name) {
128 gem_set_caching(fd, dst, c->level);
130 for (count = 1; count <= 1<<17; count <<= 1) {
131 struct timeval start, end;
133 gettimeofday(&start, NULL);
134 do_gem_read(fd, dst, src, object_size, count);
135 gettimeofday(&end, NULL);
136 igt_info("Time to %s pread %d bytes x %6d: %7.3fµs, %s\n",
137 c->name, object_size, count,
138 elapsed(&start, &end, count),
139 bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));