tests/perf: Fix timeout for RC6 re-enabling

After closing the perf stream the parking the GPU engines may easily
take more than 1 second: releasing the FD itself results in a new
request submission via i915_perf_release()->i915_oa_stream_destroy()->
gen8_disable_metric_set(). That means a >1sec delay for the delayed
unpark to be called due to the delay from

 queue_delayed_work(retire_work, round_jiffies_up_relative(HZ))

+ the delay from

 mod_delayed_work(idle_work, msecs_to_jiffies(100))

Scheduling may push this delay even further, I measured >2sec delays on
my GLK.

Fix this by calling gem_quiescent_gpu() which syncs up with the idle
work, thus making sure we'll see RC6 residency afterwards.

v2:
- Use gem_quiescent_gpu() instead of increasing the timeout. (Chris)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103179
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

0 files changed, 0 insertions, 0 deletions