static void read_rc6_residency( int value[], const char *name_of_rc6_residency)
{
unsigned int i;
const int device = drm_get_card();
char *path ;
int ret;
FILE *file;
/* For some reason my ivb isn't idle even after syncing up with the gpu.
* Let's add a sleept just to make it happy. */
sleep(5);
ret = asprintf(&path, "/sys/class/drm/card%d/power/rc6_enable", device);
igt_assert_neq(ret, -1);
file = fopen(path, "r");
igt_require(file);
/* claim success if no rc6 enabled. */
if (readit(path) == 0)
igt_success();
for(i = 0; i < 2; i++)
{
sleep(SLEEP_DURATION / 1000);
ret = asprintf(&path, "/sys/class/drm/card%d/power/%s_residency_ms",device,name_of_rc6_residency);
igt_assert_neq(ret, -1);
value[i] = readit(path);
}
free(path);
}
int main(int argc, char *argv[])
{
const int device = drm_get_card(0);
char *path, *pathp, *pathpp;
int fd, ret;
unsigned int value1, value1p, value1pp, value2, value2p, value2pp;
FILE *file;
int diff;
/* Use drm_open_any to verify device existence */
fd = drm_open_any();
close(fd);
ret = asprintf(&path, "/sys/class/drm/card%d/power/rc6_enable", device);
assert(ret != -1);
/* For some reason my ivb isn't idle even after syncing up with the gpu.
* Let's add a sleept just to make it happy. */
sleep(5);
file = fopen(path, "r");
if (!file) {
printf("kernel too old or rc6 not supported on this platform.\n");
exit(77);
}
/* claim success if no rc6 enabled. */
if (readit(path) == 0)
exit(EXIT_SUCCESS);
ret = asprintf(&path, "/sys/class/drm/card%d/power/rc6_residency_ms", device);
assert(ret != -1);
ret = asprintf(&pathp, "/sys/class/drm/card%d/power/rc6p_residency_ms", device);
assert(ret != -1);
ret = asprintf(&pathpp, "/sys/class/drm/card%d/power/rc6pp_residency_ms", device);
assert(ret != -1);
value1 = readit(path);
value1p = readit(pathp);
value1pp = readit(pathpp);
sleep(SLEEP_DURATION / 1000);
value2 = readit(path);
value2p = readit(pathp);
value2pp = readit(pathpp);
free(pathpp);
free(pathp);
free(path);
diff = (value2pp - value1pp) +
(value2p - value1p) +
(value2 - value1);
if (diff > (SLEEP_DURATION + RC6_FUDGE)) {
fprintf(stderr, "Diff was too high. That is unpossible\n");
exit(EXIT_FAILURE);
}
if (diff < (SLEEP_DURATION - RC6_FUDGE)) {
fprintf(stderr, "GPU was not in RC6 long enough. Check that "
"the GPU is as idle as possible (ie. no X, "
"running and running no other tests)\n");
exit(EXIT_FAILURE);
}
exit(EXIT_SUCCESS);
}
