1 /*
2 * QEMU buffer_is_zero speed benchmark
3 *
4 * This work is licensed under the terms of the GNU GPL, version 2 or
5 * (at your option) any later version. See the COPYING file in the
6 * top-level directory.
7 */
8 #include "qemu/osdep.h"
9 #include "qemu/cutils.h"
10 #include "qemu/units.h"
11
test(const void * opaque)12 static void test(const void *opaque)
13 {
14 size_t max = 64 * KiB;
15 void *buf = g_malloc0(max);
16 int accel_index = 0;
17
18 do {
19 if (accel_index != 0) {
20 g_test_message("%s", ""); /* gnu_printf Werror for simple "" */
21 }
22 for (size_t len = 1 * KiB; len <= max; len *= 4) {
23 double total = 0.0;
24
25 g_test_timer_start();
26 do {
27 buffer_is_zero_ge256(buf, len);
28 total += len;
29 } while (g_test_timer_elapsed() < 0.5);
30
31 total /= MiB;
32 g_test_message("buffer_is_zero #%d: %2zuKB %8.0f MB/sec",
33 accel_index, len / (size_t)KiB,
34 total / g_test_timer_last());
35 }
36 accel_index++;
37 } while (test_buffer_is_zero_next_accel());
38
39 g_free(buf);
40 }
41
main(int argc,char ** argv)42 int main(int argc, char **argv)
43 {
44 g_test_init(&argc, &argv, NULL);
45 g_test_add_data_func("/cutils/bufferiszero/speed", NULL, test);
46 return g_test_run();
47 }
48