From edb1ecad77d44e21a56e9b1bba747174379b2b54 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Wed, 18 Dec 2019 00:07:56 +0000 Subject: [PATCH] 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 Cc: Tvrtko Ursulin Reviewed-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20191218000756.3475668-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_pmu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c index 5f2adfb..0032547 100644 --- a/drivers/gpu/drm/i915/i915_pmu.c +++ b/drivers/gpu/drm/i915/i915_pmu.c @@ -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; -- 2.7.4