diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index ed320cb..59a604a 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -1680,7 +1680,8 @@
     return mQueuedFrames > 0 || mSidebandStreamChanged || mAutoRefresh;
 }
 
-void Layer::onPostComposition() {
+bool Layer::onPostComposition() {
+    bool frameLatencyNeeded = mFrameLatencyNeeded;
     if (mFrameLatencyNeeded) {
         nsecs_t desiredPresentTime = mSurfaceFlingerConsumer->getTimestamp();
         mFrameTracker.setDesiredPresentTime(desiredPresentTime);
@@ -1712,6 +1713,7 @@
         mFrameTracker.advanceFrame();
         mFrameLatencyNeeded = false;
     }
+    return frameLatencyNeeded;
 }
 
 #ifdef USE_HWC2
@@ -2185,6 +2187,20 @@
     *outAcquireFence = mSurfaceFlingerConsumer->getCurrentFence();
     *outPrevReleaseFence = mSurfaceFlingerConsumer->getPrevReleaseFence();
 }
+
+std::vector<OccupancyTracker::Segment> Layer::getOccupancyHistory(
+        bool forceFlush) {
+    std::vector<OccupancyTracker::Segment> history;
+    status_t result = mSurfaceFlingerConsumer->getOccupancyHistory(forceFlush,
+            &history);
+    if (result != NO_ERROR) {
+        ALOGW("[%s] Failed to obtain occupancy history (%d)", mName.string(),
+                result);
+        return {};
+    }
+    return history;
+}
+
 // ---------------------------------------------------------------------------
 
 Layer::LayerCleaner::LayerCleaner(const sp<SurfaceFlinger>& flinger,
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 7d085a4..79750a6 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -274,9 +274,10 @@
     bool onPreComposition();
 
     /*
-     *  called after composition.
+     * called after composition.
+     * returns true if the layer latched a new buffer this frame.
      */
-    void onPostComposition();
+    bool onPostComposition();
 
 #ifdef USE_HWC2
     // If a buffer was replaced this frame, release the former buffer
@@ -406,6 +407,8 @@
             bool* outIsGlesComposition, nsecs_t* outPostedTime,
             sp<Fence>* outAcquireFence, sp<Fence>* outPrevReleaseFence) const;
 
+    std::vector<OccupancyTracker::Segment> getOccupancyHistory(bool forceFlush);
+
 protected:
     // constant
     sp<SurfaceFlinger> mFlinger;
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 91815f3..a730ac6 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1049,7 +1049,11 @@
     const LayerVector& layers(mDrawingState.layersSortedByZ);
     const size_t count = layers.size();
     for (size_t i=0 ; i<count ; i++) {
-        layers[i]->onPostComposition();
+        bool frameLatched = layers[i]->onPostComposition();
+        if (frameLatched) {
+            recordBufferingStats(layers[i]->getName().string(),
+                    layers[i]->getOccupancyHistory(false));
+        }
     }
 
     sp<Fence> presentFence = mHwc->getRetireFence(HWC_DISPLAY_PRIMARY);
@@ -1641,6 +1645,8 @@
     if (!mLayersPendingRemoval.isEmpty()) {
         // Notify removed layers now that they can't be drawn from
         for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
+            recordBufferingStats(mLayersPendingRemoval[i]->getName().string(),
+                    mLayersPendingRemoval[i]->getOccupancyHistory(true));
             mLayersPendingRemoval[i]->onRemoved();
         }
         mLayersPendingRemoval.clear();
@@ -2720,6 +2726,59 @@
             NUM_BUCKETS - 1, bucketTimeSec, percent);
 }
 
+void SurfaceFlinger::recordBufferingStats(const char* layerName,
+        std::vector<OccupancyTracker::Segment>&& history) {
+    Mutex::Autolock lock(mBufferingStatsMutex);
+    auto& stats = mBufferingStats[layerName];
+    for (const auto& segment : history) {
+        if (!segment.usedThirdBuffer) {
+            stats.twoBufferTime += segment.totalTime;
+        }
+        if (segment.occupancyAverage < 1.0f) {
+            stats.doubleBufferedTime += segment.totalTime;
+        } else if (segment.occupancyAverage < 2.0f) {
+            stats.tripleBufferedTime += segment.totalTime;
+        }
+        ++stats.numSegments;
+        stats.totalTime += segment.totalTime;
+    }
+}
+
+void SurfaceFlinger::dumpBufferingStats(String8& result) const {
+    result.append("Buffering stats:\n");
+    result.append("  [Layer name] <Active time> <Two buffer> "
+            "<Double buffered> <Triple buffered>\n");
+    Mutex::Autolock lock(mBufferingStatsMutex);
+    typedef std::tuple<std::string, float, float, float> BufferTuple;
+    std::map<float, BufferTuple, std::greater<float>> sorted;
+    for (const auto& statsPair : mBufferingStats) {
+        const char* name = statsPair.first.c_str();
+        const BufferingStats& stats = statsPair.second;
+        if (stats.numSegments == 0) {
+            continue;
+        }
+        float activeTime = ns2ms(stats.totalTime) / 1000.0f;
+        float twoBufferRatio = static_cast<float>(stats.twoBufferTime) /
+                stats.totalTime;
+        float doubleBufferRatio = static_cast<float>(
+                stats.doubleBufferedTime) / stats.totalTime;
+        float tripleBufferRatio = static_cast<float>(
+                stats.tripleBufferedTime) / stats.totalTime;
+        sorted.insert({activeTime, {name, twoBufferRatio,
+                doubleBufferRatio, tripleBufferRatio}});
+    }
+    for (const auto& sortedPair : sorted) {
+        float activeTime = sortedPair.first;
+        const BufferTuple& values = sortedPair.second;
+        result.appendFormat("  [%s] %.2f %.3f %.3f %.3f\n",
+                std::get<0>(values).c_str(), activeTime,
+                std::get<1>(values), std::get<2>(values),
+                std::get<3>(values));
+    }
+    result.append("\n");
+}
+
+
 void SurfaceFlinger::dumpAllLocked(const Vector<String16>& args, size_t& index,
         String8& result) const
 {
@@ -2773,6 +2832,8 @@
     dumpStaticScreenStats(result);
     result.append("\n");
 
+    dumpBufferingStats(result);
+
     /*
      * Dump the visible layer list
      */
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 633e956..8263994 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -42,6 +42,7 @@
 
 #include <gui/ISurfaceComposer.h>
 #include <gui/ISurfaceComposerClient.h>
+#include <gui/OccupancyTracker.h>
 
 #include <hardware/hwcomposer_defs.h>
 
@@ -57,6 +58,9 @@
 #include "DisplayHardware/HWComposer.h"
 #include "Effects/Daltonizer.h"
 
+#include <map>
+#include <string>
+
 namespace android {
 
 // ---------------------------------------------------------------------------
@@ -432,6 +436,10 @@
 
     void dumpStaticScreenStats(String8& result) const;
 
+    void recordBufferingStats(const char* layerName,
+            std::vector<OccupancyTracker::Segment>&& history);
+    void dumpBufferingStats(String8& result) const;
+
     /* ------------------------------------------------------------------------
      * Attributes
      */
@@ -526,6 +534,29 @@
     nsecs_t mFrameBuckets[NUM_BUCKETS];
     nsecs_t mTotalTime;
     std::atomic<nsecs_t> mLastSwapTime;
+
+    // Double- vs. triple-buffering stats
+    struct BufferingStats {
+        BufferingStats()
+          : numSegments(0),
+            totalTime(0),
+            twoBufferTime(0),
+            doubleBufferedTime(0),
+            tripleBufferedTime(0) {}
+
+        size_t numSegments;
+        nsecs_t totalTime;
+
+        // "Two buffer" means that a third buffer was never used, whereas
+        // "double-buffered" means that on average the segment only used two
+        // buffers (though it may have used a third for some part of the
+        // segment)
+        nsecs_t twoBufferTime;
+        nsecs_t doubleBufferedTime;
+        nsecs_t tripleBufferedTime;
+    };
+    mutable Mutex mBufferingStatsMutex;
+    std::unordered_map<std::string, BufferingStats> mBufferingStats;
 };
 
 }; // namespace android
diff --git a/services/surfaceflinger/SurfaceFlinger_hwc1.cpp b/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
index de46dfa..ef4861d 100644
--- a/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
+++ b/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
@@ -1042,7 +1042,11 @@
     const LayerVector& layers(mDrawingState.layersSortedByZ);
     const size_t count = layers.size();
     for (size_t i=0 ; i<count ; i++) {
-        layers[i]->onPostComposition();
+        bool frameLatched = layers[i]->onPostComposition();
+        if (frameLatched) {
+            recordBufferingStats(layers[i]->getName().string(),
+                    layers[i]->getOccupancyHistory(false));
+        }
     }
 
     const HWComposer& hwc = getHwComposer();
@@ -1670,6 +1674,8 @@
     if (!mLayersPendingRemoval.isEmpty()) {
         // Notify removed layers now that they can't be drawn from
         for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
+            recordBufferingStats(mLayersPendingRemoval[i]->getName().string(),
+                    mLayersPendingRemoval[i]->getOccupancyHistory(true));
             mLayersPendingRemoval[i]->onRemoved();
         }
         mLayersPendingRemoval.clear();
@@ -2745,6 +2751,58 @@
             NUM_BUCKETS - 1, bucketTimeSec, percent);
 }
 
+void SurfaceFlinger::recordBufferingStats(const char* layerName,
+        std::vector<OccupancyTracker::Segment>&& history) {
+    Mutex::Autolock lock(mBufferingStatsMutex);
+    auto& stats = mBufferingStats[layerName];
+    for (const auto& segment : history) {
+        if (!segment.usedThirdBuffer) {
+            stats.twoBufferTime += segment.totalTime;
+        }
+        if (segment.occupancyAverage < 1.0f) {
+            stats.doubleBufferedTime += segment.totalTime;
+        } else if (segment.occupancyAverage < 2.0f) {
+            stats.tripleBufferedTime += segment.totalTime;
+        }
+        ++stats.numSegments;
+        stats.totalTime += segment.totalTime;
+    }
+}
+
+void SurfaceFlinger::dumpBufferingStats(String8& result) const {
+    result.append("Buffering stats:\n");
+    result.append("  [Layer name] <Active time> <Two buffer> "
+            "<Double buffered> <Triple buffered>\n");
+    Mutex::Autolock lock(mBufferingStatsMutex);
+    typedef std::tuple<std::string, float, float, float> BufferTuple;
+    std::map<float, BufferTuple, std::greater<float>> sorted;
+    for (const auto& statsPair : mBufferingStats) {
+        const char* name = statsPair.first.c_str();
+        const BufferingStats& stats = statsPair.second;
+        if (stats.numSegments == 0) {
+            continue;
+        }
+        float activeTime = ns2ms(stats.totalTime) / 1000.0f;
+        float twoBufferRatio = static_cast<float>(stats.twoBufferTime) /
+                stats.totalTime;
+        float doubleBufferRatio = static_cast<float>(
+                stats.doubleBufferedTime) / stats.totalTime;
+        float tripleBufferRatio = static_cast<float>(
+                stats.tripleBufferedTime) / stats.totalTime;
+        sorted.insert({activeTime, {name, twoBufferRatio,
+                doubleBufferRatio, tripleBufferRatio}});
+    }
+    for (const auto& sortedPair : sorted) {
+        float activeTime = sortedPair.first;
+        const BufferTuple& values = sortedPair.second;
+        result.appendFormat("  [%s] %.2f %.3f %.3f %.3f\n",
+                std::get<0>(values).c_str(), activeTime,
+                std::get<1>(values), std::get<2>(values),
+                std::get<3>(values));
+    }
+    result.append("\n");
+}
+
 void SurfaceFlinger::dumpAllLocked(const Vector<String16>& args, size_t& index,
         String8& result) const
 {
@@ -2796,6 +2854,8 @@
     dumpStaticScreenStats(result);
     result.append("\n");
 
+    dumpBufferingStats(result);
+
     /*
      * Dump the visible layer list
      */