[Intel-gfx] [PATCH i-g-t] igt/gem_exec_nop/headless: Verify GT performance in headless mode
Tvrtko Ursulin
tursulin at ursulin.net
Thu Apr 13 13:14:17 UTC 2017
From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Check that no-op execution speed is the same in headless mode
and with the display active.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100572
Cc: Imre Deak <imre.deak at intel.com>
---
tests/gem_exec_nop.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/tests/gem_exec_nop.c b/tests/gem_exec_nop.c
index 5d0d4957545e..e0e53a3108c6 100644
--- a/tests/gem_exec_nop.c
+++ b/tests/gem_exec_nop.c
@@ -112,6 +112,45 @@ static void single(int fd, uint32_t handle,
ring_name, count, time*1e6 / count);
}
+static void headless(int fd, uint32_t handle)
+{
+ const struct intel_execution_engine *e = &intel_execution_engines[0];
+ unsigned int nr_connected = 0;
+ drmModeConnector *connector;
+ drmModeRes *res;
+ unsigned long n1, n2;
+ double delta;
+
+ res = drmModeGetResources(fd);
+ igt_assert(res);
+
+ /* require one connected connector for the test */
+ for (int i = 0; i < res->count_connectors; i++) {
+ connector = drmModeGetConnectorCurrent(fd, res->connectors[i]);
+ if (connector->connection == DRM_MODE_CONNECTED)
+ nr_connected++;
+ drmModeFreeConnector(connector);
+ }
+ igt_require(nr_connected == 1);
+
+ /* warmup */
+ nop_on_ring(fd, handle, e->exec_id | e->flags, 2, &n1);
+ /* benchmark nops */
+ nop_on_ring(fd, handle, e->exec_id | e->flags, 2, &n1);
+
+ /* force the last connector off */
+ kmstest_unset_all_crtcs(fd, res);
+
+ /* warmup */
+ nop_on_ring(fd, handle, e->exec_id | e->flags, 2, &n2);
+ /* benchmark nops again */
+ nop_on_ring(fd, handle, e->exec_id | e->flags, 2, &n2);
+
+ /* check that the two execution speeds are roughly the same */
+ delta = abs((long)n2 - (long)n1);
+ igt_assert(delta < n1 * 0.1f);
+}
+
static bool ignore_engine(int fd, unsigned engine)
{
if (engine == 0)
@@ -494,6 +533,9 @@ igt_main
igt_subtest("context-sequential")
sequential(device, handle, FORKED | CONTEXT, 150);
+ igt_subtest("headless")
+ headless(device, handle);
+
igt_fixture {
igt_stop_hang_detector();
gem_close(device, handle);
--
2.9.3
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