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Commit b2ebc258 authored by Android Build Prod User's avatar Android Build Prod User Committed by Automerger Merge Worker
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Merge "Move reading sysprops out of the Flattener." into sc-v2-dev am: 5bfe8343 

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15674762

Change-Id: I756f2d7181e091dbfb0652df4b432ce9ab2140ee
parents 239e1dd1 5bfe8343

services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/Flattener.h

+50 −33
Original line number Diff line number Diff line
@@ -38,10 +38,14 @@ class Predictor; 


class Flattener {

public:

    struct CachedSetRenderSchedulingTunables {

        // This default assumes that rendering a cached set takes about 3ms. That time is then cut

        // in half - the next frame using the cached set would have the same workload, meaning that

        // composition cost is the same. This is best illustrated with the following example:

    // Collection of tunables which are backed by sysprops

    struct Tunables {

        // Tunables that are specific to scheduling when a cached set should be rendered

        struct RenderScheduling {

            // This default assumes that rendering a cached set takes about 3ms. That time is then

            // cut in half - the next frame using the cached set would have the same workload,

            // meaning that composition cost is the same. This is best illustrated with the

            // following example:

            //

            // Suppose we're at a 120hz cadence so SurfaceFlinger is budgeted 8.3ms per-frame. If

            // renderCachedSets costs 3ms, then two consecutive frames have timings:
@@ -52,21 +56,38 @@ public: 
            //

            // Now the second frame won't render a cached set afterwards, but the first frame didn't

            // really steal time from the second frame.

        static const constexpr std::chrono::nanoseconds kDefaultCachedSetRenderDuration = 1500us;

            static const constexpr std::chrono::nanoseconds kDefaultCachedSetRenderDuration =

                    1500us;



            static const constexpr size_t kDefaultMaxDeferRenderAttempts = 240;



        // Duration allocated for rendering a cached set. If we don't have enough time for rendering

        // a cached set, then rendering is deferred to another frame.

            // Duration allocated for rendering a cached set. If we don't have enough time for

            // rendering a cached set, then rendering is deferred to another frame.

            const std::chrono::nanoseconds cachedSetRenderDuration;

        // Maximum of times that we defer rendering a cached set. If we defer rendering a cached set

        // too many times, then render it anyways so that future frames would benefit from the

        // flattened cached set.

            // Maximum of times that we defer rendering a cached set. If we defer rendering a cached

            // set too many times, then render it anyways so that future frames would benefit from

            // the flattened cached set.

            const size_t maxDeferRenderAttempts;

        };

    Flattener(renderengine::RenderEngine& renderEngine, bool enableHolePunch = false,

              std::optional<CachedSetRenderSchedulingTunables> cachedSetRenderSchedulingTunables =

                      std::nullopt);



        static const constexpr std::chrono::milliseconds kDefaultActiveLayerTimeout = 150ms;



        static const constexpr bool kDefaultEnableHolePunch = true;



        // Threshold for determing whether a layer is active. A layer whose properties, including

        // the buffer, have not changed in at least this time is considered inactive and is

        // therefore a candidate for flattening.

        const std::chrono::milliseconds mActiveLayerTimeout;



        // Toggles for scheduling when it's safe to render a cached set.

        // See: RenderScheduling

        const std::optional<RenderScheduling> mRenderScheduling;



        // True if the hole punching feature should be enabled.

        const bool mEnableHolePunch;

    };



    Flattener(renderengine::RenderEngine& renderEngine, const Tunables& tunables);



    void setDisplaySize(ui::Size size) {

        mDisplaySize = size;
@@ -177,8 +198,7 @@ private: 
    void buildCachedSets(std::chrono::steady_clock::time_point now);



    renderengine::RenderEngine& mRenderEngine;

    const bool mEnableHolePunch;

    const std::optional<CachedSetRenderSchedulingTunables> mCachedSetRenderSchedulingTunables;

    const Tunables mTunables;



    TexturePool mTexturePool;
@@ -202,9 +222,6 @@ private: 
    size_t mCachedSetCreationCount = 0;

    size_t mCachedSetCreationCost = 0;

    std::unordered_map<size_t, size_t> mInvalidatedCachedSetAges;

    std::chrono::nanoseconds mActiveLayerTimeout = kActiveLayerTimeout;



    static constexpr auto kActiveLayerTimeout = std::chrono::nanoseconds(150ms);

};



} // namespace compositionengine::impl::planner

services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/Planner.h

+3 −0
Original line number Diff line number Diff line
@@ -39,6 +39,9 @@ namespace compositionengine::impl::planner { 
// heuristically determining the composition strategy of the current layer stack,

// and flattens inactive layers into an override buffer so it can be used

// as a more efficient representation of parts of the layer stack.

// Implicitly, layer caching must also be enabled for the Planner to have any effect

// E.g., setprop debug.sf.enable_layer_caching 1, or

// adb shell service call SurfaceFlinger 1040 i32 1 [i64 <display ID>]

class Planner {

public:

    Planner(renderengine::RenderEngine& renderengine);

services/surfaceflinger/CompositionEngine/src/planner/Flattener.cpp

+9 −18
Original line number Diff line number Diff line
@@ -60,19 +60,8 @@ bool isSameStack(const std::vector<const LayerState*>& incomingLayers, 


} // namespace



Flattener::Flattener(

        renderengine::RenderEngine& renderEngine, bool enableHolePunch,

        std::optional<CachedSetRenderSchedulingTunables> cachedSetRenderSchedulingTunables)

      : mRenderEngine(renderEngine),

        mEnableHolePunch(enableHolePunch),

        mCachedSetRenderSchedulingTunables(cachedSetRenderSchedulingTunables),

        mTexturePool(mRenderEngine) {

    const int timeoutInMs =

            base::GetIntProperty(std::string("debug.sf.layer_caching_active_layer_timeout_ms"), 0);

    if (timeoutInMs != 0) {

        mActiveLayerTimeout = std::chrono::milliseconds(timeoutInMs);

    }

}

Flattener::Flattener(renderengine::RenderEngine& renderEngine, const Tunables& tunables)

      : mRenderEngine(renderEngine), mTunables(tunables), mTexturePool(mRenderEngine) {}



NonBufferHash Flattener::flattenLayers(const std::vector<const LayerState*>& layers,

                                       NonBufferHash hash, time_point now) {
@@ -128,14 +117,14 @@ void Flattener::renderCachedSets( 
    // If we have a render deadline, and the flattener is configured to skip rendering if we don't

    // have enough time, then we skip rendering the cached set if we think that we'll steal too much

    // time from the next frame.

    if (renderDeadline && mCachedSetRenderSchedulingTunables) {

    if (renderDeadline && mTunables.mRenderScheduling) {

        if (const auto estimatedRenderFinish =

                    now + mCachedSetRenderSchedulingTunables->cachedSetRenderDuration;

                    now + mTunables.mRenderScheduling->cachedSetRenderDuration;

            estimatedRenderFinish > *renderDeadline) {

            mNewCachedSet->incrementSkipCount();



            if (mNewCachedSet->getSkipCount() <=

                mCachedSetRenderSchedulingTunables->maxDeferRenderAttempts) {

                mTunables.mRenderScheduling->maxDeferRenderAttempts) {

                ATRACE_FORMAT("DeadlinePassed: exceeded deadline by: %d us",

                              std::chrono::duration_cast<std::chrono::microseconds>(

                                      estimatedRenderFinish - *renderDeadline)
@@ -420,8 +409,10 @@ std::vector<Flattener::Run> Flattener::findCandidateRuns(time_point now) const { 
    bool runHasFirstLayer = false;



    for (auto currentSet = mLayers.cbegin(); currentSet != mLayers.cend(); ++currentSet) {

        const bool layerIsInactive = now - currentSet->getLastUpdate() > mActiveLayerTimeout;

        const bool layerIsInactive =

                now - currentSet->getLastUpdate() > mTunables.mActiveLayerTimeout;

        const bool layerHasBlur = currentSet->hasBlurBehind();



        if (layerIsInactive && (firstLayer || runHasFirstLayer || !layerHasBlur) &&

            !currentSet->hasUnsupportedDataspace()) {

            if (isPartOfRun) {
@@ -522,7 +513,7 @@ void Flattener::buildCachedSets(time_point now) { 
        mNewCachedSet->addBackgroundBlurLayer(*bestRun->getBlurringLayer());

    }



    if (mEnableHolePunch && bestRun->getHolePunchCandidate() &&

    if (mTunables.mEnableHolePunch && bestRun->getHolePunchCandidate() &&

        bestRun->getHolePunchCandidate()->requiresHolePunch()) {

        // Add the pip layer to mNewCachedSet, but in a special way - it should

        // replace the buffer with a clear round rect.

services/surfaceflinger/CompositionEngine/src/planner/Planner.cpp

+22 −12
Original line number Diff line number Diff line
@@ -32,36 +32,46 @@ namespace android::compositionengine::impl::planner { 


namespace {



std::optional<Flattener::CachedSetRenderSchedulingTunables> buildFlattenerTuneables() {

std::optional<Flattener::Tunables::RenderScheduling> buildRenderSchedulingTunables() {

    if (!base::GetBoolProperty(std::string("debug.sf.enable_cached_set_render_scheduling"), true)) {

        return std::nullopt;

    }



    auto renderDuration = std::chrono::nanoseconds(

    const auto renderDuration = std::chrono::nanoseconds(

            base::GetUintProperty<uint64_t>(std::string("debug.sf.cached_set_render_duration_ns"),

                                            Flattener::CachedSetRenderSchedulingTunables::

                                            Flattener::Tunables::RenderScheduling::

                                                    kDefaultCachedSetRenderDuration.count()));



    auto maxDeferRenderAttempts = base::GetUintProperty<

    const auto maxDeferRenderAttempts = base::GetUintProperty<

            size_t>(std::string("debug.sf.cached_set_max_defer_render_attmpts"),

                    Flattener::CachedSetRenderSchedulingTunables::kDefaultMaxDeferRenderAttempts);

                    Flattener::Tunables::RenderScheduling::kDefaultMaxDeferRenderAttempts);



    return std::make_optional<Flattener::CachedSetRenderSchedulingTunables>(

            Flattener::CachedSetRenderSchedulingTunables{

    return std::make_optional<Flattener::Tunables::RenderScheduling>(

            Flattener::Tunables::RenderScheduling{

                    .cachedSetRenderDuration = renderDuration,

                    .maxDeferRenderAttempts = maxDeferRenderAttempts,

            });

}



Flattener::Tunables buildFlattenerTuneables() {

    const auto activeLayerTimeout = std::chrono::milliseconds(

            base::GetIntProperty<int32_t>(std::string(

                                                  "debug.sf.layer_caching_active_layer_timeout_ms"),

                                          Flattener::Tunables::kDefaultActiveLayerTimeout.count()));

    const auto enableHolePunch =

            base::GetBoolProperty(std::string("debug.sf.enable_hole_punch_pip"),

                                  Flattener::Tunables::kDefaultEnableHolePunch);

    return Flattener::Tunables{

            .mActiveLayerTimeout = activeLayerTimeout,

            .mRenderScheduling = buildRenderSchedulingTunables(),

            .mEnableHolePunch = enableHolePunch,

    };

}



} // namespace



Planner::Planner(renderengine::RenderEngine& renderEngine)

      // Implicitly, layer caching must also be enabled for the hole punch or

      // predictor to have any effect.

      // E.g., setprop debug.sf.enable_layer_caching 1, or

      // adb shell service call SurfaceFlinger 1040 i32 1 [i64 <display ID>]

      : mFlattener(renderEngine,

                   base::GetBoolProperty(std::string("debug.sf.enable_hole_punch_pip"), true),

                   buildFlattenerTuneables()) {

    mPredictorEnabled =

            base::GetBoolProperty(std::string("debug.sf.enable_planner_prediction"), false);

services/surfaceflinger/CompositionEngine/tests/planner/FlattenerTest.cpp

+15 −12
Original line number Diff line number Diff line
@@ -47,23 +47,24 @@ namespace { 


class TestableFlattener : public Flattener {

public:

    TestableFlattener(renderengine::RenderEngine& renderEngine, bool enableHolePunch,

                      std::optional<Flattener::CachedSetRenderSchedulingTunables>

                              cachedSetRenderSchedulingTunables = std::nullopt)

          : Flattener(renderEngine, enableHolePunch, cachedSetRenderSchedulingTunables) {}

    TestableFlattener(renderengine::RenderEngine& renderEngine, const Tunables& tunables)

          : Flattener(renderEngine, tunables) {}

    const std::optional<CachedSet>& getNewCachedSetForTesting() const { return mNewCachedSet; }

};



class FlattenerTest : public testing::Test {

public:

    FlattenerTest() : FlattenerTest(std::nullopt) {}

    FlattenerTest()

          : FlattenerTest(Flattener::Tunables{

                    .mActiveLayerTimeout = 100ms,

                    .mRenderScheduling = std::nullopt,

                    .mEnableHolePunch = true,

            }) {}

    void SetUp() override;



protected:

    FlattenerTest(std::optional<Flattener::CachedSetRenderSchedulingTunables>

                          cachedSetRenderSchedulingTunables)

          : mFlattener(std::make_unique<TestableFlattener>(mRenderEngine, true,

                                                           cachedSetRenderSchedulingTunables)) {}

    FlattenerTest(const Flattener::Tunables& tunables)

          : mFlattener(std::make_unique<TestableFlattener>(mRenderEngine, tunables)) {}

    void initializeOverrideBuffer(const std::vector<const LayerState*>& layers);

    void initializeFlattener(const std::vector<const LayerState*>& layers);

    void expectAllLayersFlattened(const std::vector<const LayerState*>& layers);
@@ -899,11 +900,13 @@ class FlattenerRenderSchedulingTest : public FlattenerTest { 
public:

    FlattenerRenderSchedulingTest()

          : FlattenerTest(

                    Flattener::CachedSetRenderSchedulingTunables{.cachedSetRenderDuration =

                    Flattener::Tunables{.mActiveLayerTimeout = 100ms,

                                        .mRenderScheduling = Flattener::Tunables::

                                                RenderScheduling{.cachedSetRenderDuration =

                                                                         kCachedSetRenderDuration,

                                                                 .maxDeferRenderAttempts =

                                                                         kMaxDeferRenderAttempts}) {

    }

                                                                         kMaxDeferRenderAttempts},

                                        .mEnableHolePunch = true}) {}

};



TEST_F(FlattenerRenderSchedulingTest, flattenLayers_renderCachedSets_defersUpToMaxAttempts) {