diff --git a/include/utils/Vector.h b/include/utils/Vector.h
index b908e2a..5b5296b 100644
--- a/include/utils/Vector.h
+++ b/include/utils/Vector.h
@@ -186,8 +186,8 @@
      inline const_iterator end() const   { return array() + size(); }
      inline void reserve(size_t n) { setCapacity(n); }
      inline bool empty() const{ return isEmpty(); }
-     inline void push_back(const TYPE& item)  { insertAt(item, size()); }
-     inline void push_front(const TYPE& item) { insertAt(item, 0); }
+     inline void push_back(const TYPE& item)  { insertAt(item, size(), 1); }
+     inline void push_front(const TYPE& item) { insertAt(item, 0, 1); }
      inline iterator erase(iterator pos) {
          return begin() + removeItemsAt(pos-array());
      }
diff --git a/services/surfaceflinger/EventThread.cpp b/services/surfaceflinger/EventThread.cpp
index af0da0b..3c045d7 100644
--- a/services/surfaceflinger/EventThread.cpp
+++ b/services/surfaceflinger/EventThread.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -21,6 +23,7 @@
 #include <gui/DisplayEventReceiver.h>
 
 #include <utils/Errors.h>
+#include <utils/Trace.h>
 
 #include "DisplayHardware/DisplayHardware.h"
 #include "DisplayEventConnection.h"
@@ -146,6 +149,7 @@
             // at least one listener requested VSYNC
             mLock.unlock();
             timestamp = mHw.waitForRefresh();
+            ATRACE_INT("VSYNC", mDeliveredEvents&1);
             mLock.lock();
             mDeliveredEvents++;
             mLastVSyncTimestamp = timestamp;
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 42ed4fa..7f61fe4 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -460,6 +460,7 @@
 
 void SurfaceFlinger::postFramebuffer()
 {
+    ATRACE_CALL();
     // mSwapRegion can be empty here is some cases, for instance if a hidden
     // or fully transparent window is updating.
     // in that case, we need to flip anyways to not risk a deadlock with
@@ -504,6 +505,8 @@
 
 void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
 {
+    ATRACE_CALL();
+
     Mutex::Autolock _l(mStateLock);
     const nsecs_t now = systemTime();
     mDebugInTransaction = now;
@@ -601,6 +604,8 @@
 void SurfaceFlinger::computeVisibleRegions(
     const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
 {
+    ATRACE_CALL();
+
     const GraphicPlane& plane(graphicPlane(0));
     const Transform& planeTransform(plane.transform());
     const DisplayHardware& hw(plane.displayHardware());
@@ -841,6 +846,8 @@
 
 void SurfaceFlinger::handleRepaint()
 {
+    ATRACE_CALL();
+
     // compute the invalid region
     mSwapRegion.orSelf(mDirtyRegion);