diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 7152f93..3bdbb4f 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -88,14 +88,6 @@
 
 namespace android {
 
-// This works around the lack of support for the sync framework on some
-// devices.
-#ifdef RUNNING_WITHOUT_SYNC_FRAMEWORK
-static const bool runningWithoutSyncFramework = true;
-#else
-static const bool runningWithoutSyncFramework = false;
-#endif
-
 // This is the phase offset in nanoseconds of the software vsync event
 // relative to the vsync event reported by HWComposer.  The software vsync
 // event is when SurfaceFlinger and Choreographer-based applications run each
@@ -322,10 +314,13 @@
 
 class DispSyncSource : public VSyncSource, private DispSync::Callback {
 public:
-    DispSyncSource(DispSync* dispSync, nsecs_t phaseOffset, bool traceVsync) :
+    DispSyncSource(DispSync* dispSync, nsecs_t phaseOffset, bool traceVsync,
+        const char* label) :
             mValue(0),
             mPhaseOffset(phaseOffset),
             mTraceVsync(traceVsync),
+            mVsyncOnLabel(String8::format("VsyncOn-%s", label)),
+            mVsyncEventLabel(String8::format("VSYNC-%s", label)),
             mDispSync(dispSync) {}
 
     virtual ~DispSyncSource() {}
@@ -340,7 +335,7 @@
                 ALOGE("error registering vsync callback: %s (%d)",
                         strerror(-err), err);
             }
-            ATRACE_INT("VsyncOn", 1);
+            //ATRACE_INT(mVsyncOnLabel.string(), 1);
         } else {
             status_t err = mDispSync->removeEventListener(
                     static_cast<DispSync::Callback*>(this));
@@ -348,7 +343,7 @@
                 ALOGE("error unregistering vsync callback: %s (%d)",
                         strerror(-err), err);
             }
-            ATRACE_INT("VsyncOn", 0);
+            //ATRACE_INT(mVsyncOnLabel.string(), 0);
         }
     }
 
@@ -366,7 +361,7 @@
 
             if (mTraceVsync) {
                 mValue = (mValue + 1) % 2;
-                ATRACE_INT("VSYNC", mValue);
+                ATRACE_INT(mVsyncEventLabel.string(), mValue);
             }
         }
 
@@ -379,6 +374,8 @@
 
     const nsecs_t mPhaseOffset;
     const bool mTraceVsync;
+    const String8 mVsyncOnLabel;
+    const String8 mVsyncEventLabel;
 
     DispSync* mDispSync;
     sp<VSyncSource::Callback> mCallback;
@@ -449,10 +446,10 @@
 
     // start the EventThread
     sp<VSyncSource> vsyncSrc = new DispSyncSource(&mPrimaryDispSync,
-            vsyncPhaseOffsetNs, true);
+            vsyncPhaseOffsetNs, true, "app");
     mEventThread = new EventThread(vsyncSrc);
     sp<VSyncSource> sfVsyncSrc = new DispSyncSource(&mPrimaryDispSync,
-            sfVsyncPhaseOffsetNs, false);
+            sfVsyncPhaseOffsetNs, true, "sf");
     mSFEventThread = new EventThread(sfVsyncSrc);
     mEventQueue.setEventThread(mSFEventThread);
 
@@ -858,7 +855,7 @@
         }
     }
 
-    if (runningWithoutSyncFramework) {
+    if (kIgnorePresentFences) {
         const sp<const DisplayDevice> hw(getDefaultDisplayDevice());
         if (hw->isScreenAcquired()) {
             enableHardwareVsync();