On bxt, we see that the rc6 subtest flip-flops as RC6 does not restart
within our desired interval. Improve the likelihood of the inspection
passing by idling the GPU and waiting for 2 Evaluation Intervals before
we start polling of RC6 residency.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
tests/gem_mocs_settings.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/tests/gem_mocs_settings.c b/tests/gem_mocs_settings.c
index 9705fbfd..85fd637a 100644
--- a/tests/gem_mocs_settings.c
+++ b/tests/gem_mocs_settings.c
@@ -336,12 +336,15 @@ static uint32_t rc6_residency(int dir)
static void rc6_wait(int fd)
{
- int sysfs;
uint32_t residency;
+ int sysfs;
sysfs = igt_sysfs_open(fd, NULL);
igt_assert_lte(0, sysfs);
+ gem_quiescent_gpu(fd);
+ usleep(320e3); /* Wait for 2 EIs before polling; should now be active */
+
residency = rc6_residency(sysfs);
igt_require(igt_wait(rc6_residency(sysfs) != residency, 10000, 2));
--
2.16.2
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