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Commit cd6b92d7 authored by Kevin DuBois's avatar Kevin DuBois Committed by Automerger Merge Worker
Browse files

Merge "SF: update VSP timebase on error condition" into rvc-dev am: 9b2526e5 

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/12014614

Change-Id: I96cdf0e0edb0b3b34479b29706e02009d9b4dd64
parents 43b7805a 9b2526e5

services/surfaceflinger/Scheduler/VSyncPredictor.cpp

+15 −2
Original line number Diff line number Diff line
@@ -77,7 +77,14 @@ bool VSyncPredictor::addVsyncTimestamp(nsecs_t timestamp) { 
    std::lock_guard<std::mutex> lk(mMutex);



    if (!validate(timestamp)) {

        ALOGV("timestamp was too far off the last known timestamp");

        // VSR could elect to ignore the incongruent timestamp or resetModel(). If ts is ignored,

        // don't insert this ts into mTimestamps ringbuffer.

        if (!mTimestamps.empty()) {

            mKnownTimestamp =

                    std::max(timestamp, *std::max_element(mTimestamps.begin(), mTimestamps.end()));

        } else {

            mKnownTimestamp = timestamp;

        }

        return false;

    }
@@ -236,7 +243,13 @@ void VSyncPredictor::setPeriod(nsecs_t period) { 


void VSyncPredictor::clearTimestamps() {

    if (!mTimestamps.empty()) {

        mKnownTimestamp = *std::max_element(mTimestamps.begin(), mTimestamps.end());

        auto const maxRb = *std::max_element(mTimestamps.begin(), mTimestamps.end());

        if (mKnownTimestamp) {

            mKnownTimestamp = std::max(*mKnownTimestamp, maxRb);

        } else {

            mKnownTimestamp = maxRb;

        }



        mTimestamps.clear();

        mLastTimestampIndex = 0;

    }

services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp

+32 −0
Original line number Diff line number Diff line
@@ -124,6 +124,38 @@ TEST_F(VSyncPredictorTest, uponNotifiedOfInaccuracyUsesSynthetic) { 
    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + changedPeriod));

}



// b/159882858

TEST_F(VSyncPredictorTest, updatesTimebaseForSyntheticAfterIdleTime) {

    for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {

        EXPECT_TRUE(tracker.addVsyncTimestamp(mNow += mPeriod));

    }



    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + mPeriod));



    auto const halfPeriod = mPeriod >> 2;

    nsecs_t relativelyLongGapWithDrift = mPeriod * 100 + halfPeriod;



    EXPECT_FALSE(tracker.addVsyncTimestamp(mNow += relativelyLongGapWithDrift));



    tracker.resetModel();

    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + mPeriod));

}



TEST_F(VSyncPredictorTest, uponBadVsyncWillSwitchToSyntheticWhileRecalibrating) {

    auto const slightlyMorePeriod = mPeriod + 10;

    for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {

        EXPECT_TRUE(tracker.addVsyncTimestamp(mNow += slightlyMorePeriod));

    }



    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + slightlyMorePeriod));



    auto const halfPeriod = mPeriod >> 2;

    EXPECT_FALSE(tracker.addVsyncTimestamp(mNow += halfPeriod));



    tracker.resetModel();

    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + mPeriod));

}



TEST_F(VSyncPredictorTest, adaptsToFenceTimelines_60hzHighVariance) {

    // these are precomputed simulated 16.6s vsyncs with uniform distribution +/- 1.6ms error

    std::vector<nsecs_t> const simulatedVsyncs{