diff --git a/services/surfaceflinger/FrameTracker.cpp b/services/surfaceflinger/FrameTracker.cpp
index 5c66ff9..9b55d44 100644
--- a/services/surfaceflinger/FrameTracker.cpp
+++ b/services/surfaceflinger/FrameTracker.cpp
@@ -31,28 +31,34 @@
 }
 
 void FrameTracker::setDesiredPresentTime(nsecs_t presentTime) {
+    Mutex::Autolock lock(mMutex);
     mFrameRecords[mOffset].desiredPresentTime = presentTime;
 }
 
 void FrameTracker::setFrameReadyTime(nsecs_t readyTime) {
+    Mutex::Autolock lock(mMutex);
     mFrameRecords[mOffset].frameReadyTime = readyTime;
 }
 
 void FrameTracker::setFrameReadyFence(const sp<Fence>& readyFence) {
+    Mutex::Autolock lock(mMutex);
     mFrameRecords[mOffset].frameReadyFence = readyFence;
     mNumFences++;
 }
 
 void FrameTracker::setActualPresentTime(nsecs_t presentTime) {
+    Mutex::Autolock lock(mMutex);
     mFrameRecords[mOffset].actualPresentTime = presentTime;
 }
 
 void FrameTracker::setActualPresentFence(const sp<Fence>& readyFence) {
+    Mutex::Autolock lock(mMutex);
     mFrameRecords[mOffset].actualPresentFence = readyFence;
     mNumFences++;
 }
 
 void FrameTracker::advanceFrame() {
+    Mutex::Autolock lock(mMutex);
     mOffset = (mOffset+1) % NUM_FRAME_RECORDS;
     mFrameRecords[mOffset].desiredPresentTime = INT64_MAX;
     mFrameRecords[mOffset].frameReadyTime = INT64_MAX;
@@ -74,10 +80,11 @@
 
     // Clean up the signaled fences to keep the number of open fence FDs in
     // this process reasonable.
-    processFences();
+    processFencesLocked();
 }
 
 void FrameTracker::clear() {
+    Mutex::Autolock lock(mMutex);
     for (size_t i = 0; i < NUM_FRAME_RECORDS; i++) {
         mFrameRecords[i].desiredPresentTime = 0;
         mFrameRecords[i].frameReadyTime = 0;
@@ -86,9 +93,12 @@
         mFrameRecords[i].actualPresentFence.clear();
     }
     mNumFences = 0;
+    mFrameRecords[mOffset].desiredPresentTime = INT64_MAX;
+    mFrameRecords[mOffset].frameReadyTime = INT64_MAX;
+    mFrameRecords[mOffset].actualPresentTime = INT64_MAX;
 }
 
-void FrameTracker::processFences() const {
+void FrameTracker::processFencesLocked() const {
     FrameRecord* records = const_cast<FrameRecord*>(mFrameRecords);
     int& numFences = const_cast<int&>(mNumFences);
 
@@ -116,7 +126,8 @@
 }
 
 void FrameTracker::dump(String8& result) const {
-    processFences();
+    Mutex::Autolock lock(mMutex);
+    processFencesLocked();
 
     const size_t o = mOffset;
     for (size_t i = 1; i < NUM_FRAME_RECORDS; i++) {
diff --git a/services/surfaceflinger/FrameTracker.h b/services/surfaceflinger/FrameTracker.h
index e8a8c48..3d122c4 100644
--- a/services/surfaceflinger/FrameTracker.h
+++ b/services/surfaceflinger/FrameTracker.h
@@ -19,6 +19,7 @@
 
 #include <stddef.h>
 
+#include <utils/Mutex.h>
 #include <utils/Timers.h>
 #include <utils/RefBase.h>
 
@@ -96,7 +97,7 @@
     // This method is const because although it modifies the frame records it
     // does so in such a way that the information represented should not
     // change.  This allows it to be called from the dump method.
-    void processFences() const;
+    void processFencesLocked() const;
 
     // mFrameRecords is the circular buffer storing the tracked data for each
     // frame.
@@ -113,6 +114,9 @@
     // The number of fences is tracked so that the run time of processFences
     // doesn't grow with NUM_FRAME_RECORDS.
     int mNumFences;
+
+    // mMutex is used to protect access to all member variables.
+    mutable Mutex mMutex;
 };
 
 }
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 0cc03e1..1feb9de 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -757,9 +757,6 @@
 void Layer::dumpStats(String8& result, char* buffer, size_t SIZE) const
 {
     LayerBaseClient::dumpStats(result, buffer, SIZE);
-    const nsecs_t period =
-            mFlinger->getHwComposer().getRefreshPeriod(HWC_DISPLAY_PRIMARY);
-    result.appendFormat("%lld\n", period);
     mFrameTracker.dump(result);
 }
 
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index ef829ed..a82767b 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -129,6 +129,7 @@
 
     // thread-safe
     volatile int32_t mQueuedFrames;
+    FrameTracker mFrameTracker;
 
     // main thread
     sp<GraphicBuffer> mActiveBuffer;
@@ -138,7 +139,6 @@
     bool mCurrentOpacity;
     bool mRefreshPending;
     bool mFrameLatencyNeeded;
-    FrameTracker mFrameTracker;
 
     // constants
     PixelFormat mFormat;
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 1fa3b8f..caabf1d 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -93,6 +93,7 @@
         mBootTime(systemTime()),
         mVisibleRegionsDirty(false),
         mHwWorkListDirty(false),
+        mAnimCompositionPending(false),
         mDebugRegion(0),
         mDebugDDMS(0),
         mDebugDisableHWC(0),
@@ -885,6 +886,22 @@
     for (size_t i=0 ; i<count ; i++) {
         currentLayers[i]->onPostComposition();
     }
+
+    if (mAnimCompositionPending) {
+        mAnimCompositionPending = false;
+
+        const HWComposer& hwc = getHwComposer();
+        sp<Fence> presentFence = hwc.getDisplayFence(HWC_DISPLAY_PRIMARY);
+        if (presentFence != NULL) {
+            mAnimFrameTracker.setActualPresentFence(presentFence);
+        } else {
+            // The HWC doesn't support present fences, so use the refresh
+            // timestamp instead.
+            nsecs_t presentTime = hwc.getRefreshTimestamp(HWC_DISPLAY_PRIMARY);
+            mAnimFrameTracker.setActualPresentTime(presentTime);
+        }
+        mAnimFrameTracker.advanceFrame();
+    }
 }
 
 void SurfaceFlinger::rebuildLayerStacks() {
@@ -1301,6 +1318,10 @@
         mLayersPendingRemoval.clear();
     }
 
+    // If this transaction is part of a window animation then the next frame
+    // we composite should be considered an animation as well.
+    mAnimCompositionPending = mAnimTransactionPending;
+
     mDrawingState = mCurrentState;
     mTransactionPending = false;
     mAnimTransactionPending = false;
@@ -2264,22 +2285,26 @@
         index++;
     }
 
-    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
-    const size_t count = currentLayers.size();
-    for (size_t i=0 ; i<count ; i++) {
-        const sp<LayerBase>& layer(currentLayers[i]);
-        if (name.isEmpty()) {
-            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
-            result.append(buffer);
-        }
-        if (name.isEmpty() || (name == layer->getName())) {
-            layer->dumpStats(result, buffer, SIZE);
+    const nsecs_t period =
+            getHwComposer().getRefreshPeriod(HWC_DISPLAY_PRIMARY);
+    result.appendFormat("%lld\n", period);
+
+    if (name.isEmpty()) {
+        mAnimFrameTracker.dump(result);
+    } else {
+        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
+        const size_t count = currentLayers.size();
+        for (size_t i=0 ; i<count ; i++) {
+            const sp<LayerBase>& layer(currentLayers[i]);
+            if (name == layer->getName()) {
+                layer->dumpStats(result, buffer, SIZE);
+            }
         }
     }
 }
 
 void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
-        String8& result, char* buffer, size_t SIZE) const
+        String8& result, char* buffer, size_t SIZE)
 {
     String8 name;
     if (index < args.size()) {
@@ -2295,6 +2320,8 @@
             layer->clearStats();
         }
     }
+
+    mAnimFrameTracker.clear();
 }
 
 /*static*/ void SurfaceFlinger::appendSfConfigString(String8& result)
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 65fea30..72dd652 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -45,8 +45,9 @@
 #include <private/gui/LayerState.h>
 
 #include "Barrier.h"
-#include "MessageQueue.h"
 #include "DisplayDevice.h"
+#include "FrameTracker.h"
+#include "MessageQueue.h"
 
 #include "DisplayHardware/HWComposer.h"
 
@@ -390,7 +391,7 @@
     void dumpStatsLocked(const Vector<String16>& args, size_t& index,
         String8& result, char* buffer, size_t SIZE) const;
     void clearStatsLocked(const Vector<String16>& args, size_t& index,
-        String8& result, char* buffer, size_t SIZE) const;
+        String8& result, char* buffer, size_t SIZE);
     void dumpAllLocked(String8& result, char* buffer, size_t SIZE) const;
     bool startDdmConnection();
     static void appendSfConfigString(String8& result);
@@ -432,6 +433,7 @@
     State mDrawingState;
     bool mVisibleRegionsDirty;
     bool mHwWorkListDirty;
+    bool mAnimCompositionPending;
 
     // this may only be written from the main thread with mStateLock held
     // it may be read from other threads with mStateLock held
@@ -451,6 +453,7 @@
     // these are thread safe
     mutable MessageQueue mEventQueue;
     mutable Barrier mReadyToRunBarrier;
+    FrameTracker mAnimFrameTracker;
 
     // protected by mDestroyedLayerLock;
     mutable Mutex mDestroyedLayerLock;