Commit edb1ecad authored Dec 18, 2019 by 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: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191218000756.3475668-1-chris@chris-wilson.co.uk

parent 54d7195f

drivers/gpu/drm/i915/i915_pmu.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;