[Intel-gfx] [PATCH v5 3/7] drm/i915/pmu: Skip sampling engines with no enabled counters

Umesh Nerlige Ramappa
2023-05-16T23:35:49Z

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

As we have more and more engines do not waste time sampling the ones no-
one is monitoring.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
---
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 9edf87ee5d10..6d594f67f365 100644
--- a/drivers/gpu/drm/i915/i915_pmu.c
+++ b/drivers/gpu/drm/i915/i915_pmu.c
@@ -350,6 +350,9 @@ engines_sample(struct intel_gt *gt, unsigned int period_ns)
return;

for_each_engine(engine, gt, id) {
+ if (!engine->pmu.enable)
+ continue;
+
if (!intel_engine_pm_get_if_awake(engine))
continue;

--
2.36.1