Commit edb1ecad authored by Chris Wilson's avatar Chris Wilson

drm/i915/pmu: Skip sampling engines if gt is asleep

If the whole GT is asleep, we know that each engine must also be asleep
and so we can quickly return without checking them all.
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191218000756.3475668-1-chris@chris-wilson.co.uk
parent 54d7195f
......@@ -312,6 +312,9 @@ engines_sample(struct intel_gt *gt, unsigned int period_ns)
if ((i915->pmu.enable & ENGINE_SAMPLE_MASK) == 0)
return;
if (!intel_gt_pm_is_awake(gt))
return;
for_each_engine(engine, gt, id) {
struct intel_engine_pmu *pmu = &engine->pmu;
spinlock_t *mmio_lock;
......
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