SurfaceFlinger: throttle applications based on uid
Add the ability for SurfaceFlinger to be able to throttle down to
a divider of the refresh rate (i.e. for 30/45 for 90Hz)
Change-Id: I6bfd6f43ee1f30e771a136c558d8ae9a6d7fbe0f
Test: Manually via 1039 SF backdoor
Bug: 170502573
Bug: 169270763
Bug: 169271059
diff --git a/services/surfaceflinger/Scheduler/VSyncPredictor.h b/services/surfaceflinger/Scheduler/VSyncPredictor.h
index 5f2ec49..381cf81 100644
--- a/services/surfaceflinger/Scheduler/VSyncPredictor.h
+++ b/services/surfaceflinger/Scheduler/VSyncPredictor.h
@@ -38,10 +38,10 @@
uint32_t outlierTolerancePercent);
~VSyncPredictor();
- bool addVsyncTimestamp(nsecs_t timestamp) final;
- nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t timePoint) const final;
- nsecs_t currentPeriod() const final;
- void resetModel() final;
+ bool addVsyncTimestamp(nsecs_t timestamp) final EXCLUDES(mMutex);
+ nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t timePoint) const final EXCLUDES(mMutex);
+ nsecs_t currentPeriod() const final EXCLUDES(mMutex);
+ void resetModel() final EXCLUDES(mMutex);
/*
* Inform the model that the period is anticipated to change to a new value.
@@ -50,16 +50,23 @@
*
* \param [in] period The new period that should be used.
*/
- void setPeriod(nsecs_t period) final;
+ void setPeriod(nsecs_t period) final EXCLUDES(mMutex);
/* Query if the model is in need of more samples to make a prediction.
* \return True, if model would benefit from more samples, False if not.
*/
- bool needsMoreSamples() const final;
+ bool needsMoreSamples() const final EXCLUDES(mMutex);
- std::tuple<nsecs_t /* slope */, nsecs_t /* intercept */> getVSyncPredictionModel() const;
+ struct Model {
+ nsecs_t slope;
+ nsecs_t intercept;
+ };
- void dump(std::string& result) const final;
+ VSyncPredictor::Model getVSyncPredictionModel() const EXCLUDES(mMutex);
+
+ bool isVSyncInPhase(nsecs_t timePoint, int divider) const final EXCLUDES(mMutex);
+
+ void dump(std::string& result) const final EXCLUDES(mMutex);
private:
VSyncPredictor(VSyncPredictor const&) = delete;
@@ -76,13 +83,19 @@
std::mutex mutable mMutex;
size_t next(size_t i) const REQUIRES(mMutex);
bool validate(nsecs_t timestamp) const REQUIRES(mMutex);
- std::tuple<nsecs_t, nsecs_t> getVSyncPredictionModel(std::lock_guard<std::mutex> const&) const
- REQUIRES(mMutex);
+
+ Model getVSyncPredictionModelLocked() const REQUIRES(mMutex);
+
+ nsecs_t nextAnticipatedVSyncTimeFromLocked(nsecs_t timePoint) const REQUIRES(mMutex);
nsecs_t mIdealPeriod GUARDED_BY(mMutex);
std::optional<nsecs_t> mKnownTimestamp GUARDED_BY(mMutex);
- std::unordered_map<nsecs_t, std::tuple<nsecs_t, nsecs_t>> mutable mRateMap GUARDED_BY(mMutex);
+ // Map between ideal vsync period and the calculated model
+ std::unordered_map<nsecs_t, Model> mutable mRateMap GUARDED_BY(mMutex);
+
+ // Map between the divided vsync period and the last known vsync timestamp
+ std::unordered_map<nsecs_t, nsecs_t> mutable mRateDividerKnownTimestampMap GUARDED_BY(mMutex);
size_t mLastTimestampIndex GUARDED_BY(mMutex) = 0;
std::vector<nsecs_t> mTimestamps GUARDED_BY(mMutex);