1*a06d9eddSRichard Henderson /*
2*a06d9eddSRichard Henderson * QEMU buffer_is_zero speed benchmark
3*a06d9eddSRichard Henderson *
4*a06d9eddSRichard Henderson * This work is licensed under the terms of the GNU GPL, version 2 or
5*a06d9eddSRichard Henderson * (at your option) any later version. See the COPYING file in the
6*a06d9eddSRichard Henderson * top-level directory.
7*a06d9eddSRichard Henderson */
8*a06d9eddSRichard Henderson #include "qemu/osdep.h"
9*a06d9eddSRichard Henderson #include "qemu/cutils.h"
10*a06d9eddSRichard Henderson #include "qemu/units.h"
11*a06d9eddSRichard Henderson
test(const void * opaque)12*a06d9eddSRichard Henderson static void test(const void *opaque)
13*a06d9eddSRichard Henderson {
14*a06d9eddSRichard Henderson size_t max = 64 * KiB;
15*a06d9eddSRichard Henderson void *buf = g_malloc0(max);
16*a06d9eddSRichard Henderson int accel_index = 0;
17*a06d9eddSRichard Henderson
18*a06d9eddSRichard Henderson do {
19*a06d9eddSRichard Henderson if (accel_index != 0) {
20*a06d9eddSRichard Henderson g_test_message("%s", ""); /* gnu_printf Werror for simple "" */
21*a06d9eddSRichard Henderson }
22*a06d9eddSRichard Henderson for (size_t len = 1 * KiB; len <= max; len *= 4) {
23*a06d9eddSRichard Henderson double total = 0.0;
24*a06d9eddSRichard Henderson
25*a06d9eddSRichard Henderson g_test_timer_start();
26*a06d9eddSRichard Henderson do {
27*a06d9eddSRichard Henderson buffer_is_zero_ge256(buf, len);
28*a06d9eddSRichard Henderson total += len;
29*a06d9eddSRichard Henderson } while (g_test_timer_elapsed() < 0.5);
30*a06d9eddSRichard Henderson
31*a06d9eddSRichard Henderson total /= MiB;
32*a06d9eddSRichard Henderson g_test_message("buffer_is_zero #%d: %2zuKB %8.0f MB/sec",
33*a06d9eddSRichard Henderson accel_index, len / (size_t)KiB,
34*a06d9eddSRichard Henderson total / g_test_timer_last());
35*a06d9eddSRichard Henderson }
36*a06d9eddSRichard Henderson accel_index++;
37*a06d9eddSRichard Henderson } while (test_buffer_is_zero_next_accel());
38*a06d9eddSRichard Henderson
39*a06d9eddSRichard Henderson g_free(buf);
40*a06d9eddSRichard Henderson }
41*a06d9eddSRichard Henderson
main(int argc,char ** argv)42*a06d9eddSRichard Henderson int main(int argc, char **argv)
43*a06d9eddSRichard Henderson {
44*a06d9eddSRichard Henderson g_test_init(&argc, &argv, NULL);
45*a06d9eddSRichard Henderson g_test_add_data_func("/cutils/bufferiszero/speed", NULL, test);
46*a06d9eddSRichard Henderson return g_test_run();
47*a06d9eddSRichard Henderson }
48