| 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 | |
| 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 | |
| 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 | } |