SF: rate-limit luma sampling
Instead of sampling the luma regions every frame, introduce a rate
limiting system to reduce load. Introduces a few tunables to control
the rate, which is defaulted to 10Hz, when there is content being
watched for luma.
Test: manual systrace inspection, using SamplingDemo
Test: libgui_test --gtest_filter="RegionSampling*"
Test: atest CompositionSamplingListenerTest
Fixes: 126747045
Change-Id: I7cae3e90fb405ba72dc2f276a88be48f1533a219
diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index 0ba6cf9..0063c8a 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -304,6 +304,10 @@
mApiHistoryCounter = mApiHistoryCounter % scheduler::ARRAY_SIZE;
}
+void Scheduler::withPrimaryDispSync(std::function<void(DispSync&)> const& fn) {
+ fn(*mPrimaryDispSync);
+}
+
void Scheduler::updateFpsBasedOnNativeWindowApi() {
int mode;
{
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index 2582c93..73896d5 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -17,6 +17,7 @@
#pragma once
#include <cstdint>
+#include <functional>
#include <memory>
#include <ui/DisplayStatInfo.h>
@@ -104,6 +105,9 @@
// Getter methods.
EventThread* getEventThread(const sp<ConnectionHandle>& handle);
+ // Provides access to the DispSync object for the primary display.
+ void withPrimaryDispSync(std::function<void(DispSync&)> const& fn);
+
sp<EventThreadConnection> getEventConnection(const sp<ConnectionHandle>& handle);
// Should be called when receiving a hotplug event.