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Commit a3d795a3 authored by John Reck's avatar John Reck
Browse files

Drop less aggressively 

Bug: 30342762

Frame dropping was too frequent and would trigger
during normal triple buffering steady state. Bump
the threshold to drop from 3ms stall to 6ms stall.

Change-Id: I5c1faeaabf0d02323a28e697a4af4105fbcf1c53
parent 255ad67b

libs/hwui/renderthread/CanvasContext.cpp

+6 −4
Original line number Diff line number Diff line
@@ -199,6 +199,8 @@ static bool wasSkipped(FrameInfo* info) { 
}



bool CanvasContext::isSwapChainStuffed() {

    static const auto SLOW_THRESHOLD = 6_ms;



    if (mSwapHistory.size() != mSwapHistory.capacity()) {

        // We want at least 3 frames of history before attempting to

        // guess if the queue is stuffed
@@ -209,8 +211,8 @@ bool CanvasContext::isSwapChainStuffed() { 


    // Was there a happy queue & dequeue time? If so, don't

    // consider it stuffed

    if (swapA.dequeueDuration < 3_ms

            && swapA.queueDuration < 3_ms) {

    if (swapA.dequeueDuration < SLOW_THRESHOLD

            && swapA.queueDuration < SLOW_THRESHOLD) {

        return false;

    }
@@ -225,8 +227,8 @@ bool CanvasContext::isSwapChainStuffed() { 


        // Was there a happy queue & dequeue time? If so, don't

        // consider it stuffed

        if (swapB.dequeueDuration < 3_ms

                && swapB.queueDuration < 3_ms) {

        if (swapB.dequeueDuration < SLOW_THRESHOLD

                && swapB.queueDuration < SLOW_THRESHOLD) {

            return false;

        }