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igt/gem_exec_(nop|blt): Repeat measurements at min/max GPU frequencies

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2015-03-26 12:09:57 +00:00
parent 7763349a9a
commit 2659cbbf64
2 changed files with 225 additions and 23 deletions
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tests/gem_exec_blt.c
+102 -6
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@@ -283,8 +283,92 @@ static void run(int object_size, bool dumb)
close(fd);
}
static int sysfs_read(const char *name)
{
char buf[4096];
int sysfd;
int len;
sprintf(buf, "/sys/class/drm/card%d/%s",
drm_get_card(), name);
sysfd = open(buf, O_RDONLY);
if (sysfd < 0)
return -1;
len = read(sysfd, buf, sizeof(buf)-1);
close(sysfd);
if (len < 0)
return -1;
buf[len] = '\0';
return atoi(buf);
}
static int sysfs_write(const char *name, int value)
{
char buf[4096];
int sysfd;
int len;
sprintf(buf, "/sys/class/drm/card%d/%s",
drm_get_card(), name);
sysfd = open(buf, O_WRONLY);
if (sysfd < 0)
return -1;
len = sprintf(buf, "%d", value);
len = write(sysfd, buf, len);
close(sysfd);
if (len < 0)
return len;
return 0;
}
static void set_auto_freq(void)
{
int min = sysfs_read("gt_RPn_freq_mhz");
int max = sysfs_read("gt_RP0_freq_mhz");
if (max <= min)
return;
igt_debug("Setting min to %dMHz, and max to %dMHz\n", min, max);
sysfs_write("gt_min_freq_mhz", min);
sysfs_write("gt_max_freq_mhz", max);
}
static void set_min_freq(void)
{
int min = sysfs_read("gt_RPn_freq_mhz");
igt_require(min > 0);
igt_debug("Setting min/max to %dMHz\n", min);
igt_require(sysfs_write("gt_min_freq_mhz", min) == 0 &&
sysfs_write("gt_max_freq_mhz", min) == 0);
}
static void set_max_freq(void)
{
int max = sysfs_read("gt_RP0_freq_mhz");
igt_require(max > 0);
igt_debug("Setting min/max to %dMHz\n", max);
igt_require(sysfs_write("gt_max_freq_mhz", max) == 0 &&
sysfs_write("gt_min_freq_mhz", max) == 0);
}
int main(int argc, char **argv)
{
const struct {
const char *suffix;
void (*func)(void);
} rps[] = {
{ "", set_auto_freq },
{ "-min", set_min_freq },
{ "-max", set_max_freq },
{ NULL, NULL },
}, *r;
int min = -1, max = -1;
int i;
igt_subtest_init(argc, argv);
@@ -300,14 +384,26 @@ int main(int argc, char **argv)
return 0;
}
igt_subtest("cold")
run(OBJECT_SIZE, false);
min = sysfs_read("gt_min_freq_mhz");
max = sysfs_read("gt_max_freq_mhz");
igt_subtest("normal")
run(OBJECT_SIZE, false);
for (r = rps; r->suffix; r++) {
r->func();
igt_subtest("dumb-buf")
run(OBJECT_SIZE, true);
igt_subtest_f("cold%s", r->suffix)
run(OBJECT_SIZE, false);
igt_subtest_f("normal%s", r->suffix)
run(OBJECT_SIZE, false);
igt_subtest_f("dumb-buf%s", r->suffix)
run(OBJECT_SIZE, true);
}
if (min > 0)
sysfs_write("gt_min_freq_mhz", min);
if (max > 0)
sysfs_write("gt_max_freq_mhz", max);
igt_exit();
}