commit 0bb6a47f5264571690d57c609f0e945086dba9b1
author Ady Abraham <adyabr@google.com> Mon Oct 12 10:22:13 2020 -0700
committer Ady Abraham <adyabr@google.com> Tue Nov 03 10:19:21 2020 -0800
tree f9ab6720e867e1f133360a4515036e15e4f1694f
parent 9febda8e05bbd924d14682454fdc7a846c38f954

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

services/surfaceflinger/Scheduler/RefreshRateConfigs.h

diff --git a/services/surfaceflinger/Scheduler/RefreshRateConfigs.h b/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
index 280ed62..5cf7d07 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
+++ b/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
@@ -311,6 +311,13 @@
     // refresh rates.
     KernelIdleTimerAction getIdleTimerAction() const;
 
+    // Stores the preferred refresh rate that an app should run at.
+    // refreshRate == 0 means no preference.
+    void setPreferredRefreshRateForUid(uid_t, float refreshRateHz) EXCLUDES(mLock);
+
+    // Returns a divider for the current refresh rate
+    int getRefreshRateDividerForUid(uid_t) const EXCLUDES(mLock);
+
 private:
     friend class RefreshRateConfigsTest;
 
@@ -368,6 +375,8 @@
     Policy mDisplayManagerPolicy GUARDED_BY(mLock);
     std::optional<Policy> mOverridePolicy GUARDED_BY(mLock);
 
+    std::unordered_map<uid_t, float> mPreferredRefreshRateForUid GUARDED_BY(mLock);
+
     // The min and max refresh rates supported by the device.
     // This will not change at runtime.
     const RefreshRate* mMinSupportedRefreshRate;