Beispiel #1
0
int ImageHost::ChooseImageIndex() const
{
  if (!GetCompositor() || mImages.IsEmpty()) {
    return -1;
  }
  TimeStamp now = GetCompositor()->GetCompositionTime();

  if (now.IsNull()) {
    // Not in a composition, so just return the last image we composited
    // (if it's one of the current images).
    for (uint32_t i = 0; i < mImages.Length(); ++i) {
      if (mImages[i].mFrameID == mLastFrameID &&
          mImages[i].mProducerID == mLastProducerID) {
        return i;
      }
    }
    return -1;
  }

  uint32_t result = 0;
  while (result + 1 < mImages.Length() &&
      GetBiasedTime(mImages[result + 1].mTimeStamp, mBias) <= now) {
    ++result;
  }
  return result;
}
Beispiel #2
0
TimeStamp
FPSCounter::GetLatestTimeStamp()
{
  TimeStamp timestamp = mFrameTimestamps[GetLatestReadIndex()];
  MOZ_ASSERT(!timestamp.IsNull(), "Cannot use null timestamps");
  return timestamp;
}
Beispiel #3
0
DOMHighResTimeStamp
nsPerformanceTiming::FetchStartHighRes()
{
  if (!mFetchStart) {
    if (!nsContentUtils::IsPerformanceTimingEnabled() || !IsInitialized()) {
      return mZeroTime;
    }
    TimeStamp stamp;
    mChannel->GetAsyncOpen(&stamp);
    MOZ_ASSERT(!stamp.IsNull(), "The fetch start time stamp should always be "
        "valid if the performance timing is enabled");
    mFetchStart = (!stamp.IsNull())
        ? TimeStampToDOMHighRes(stamp)
        : 0.0;
  }
  return mFetchStart;
}
Beispiel #4
0
NS_IMETHODIMP
nsAppStartup::TrackStartupCrashEnd()
{
  bool inSafeMode = false;
  nsCOMPtr<nsIXULRuntime> xr = do_GetService(XULRUNTIME_SERVICE_CONTRACTID);
  if (xr)
    xr->GetInSafeMode(&inSafeMode);

  // return if we already ended or we're restarting into safe mode
  if (mStartupCrashTrackingEnded || (mIsSafeModeNecessary && !inSafeMode))
    return NS_OK;
  mStartupCrashTrackingEnded = true;

  StartupTimeline::Record(StartupTimeline::STARTUP_CRASH_DETECTION_END);

  // Use the timestamp of XRE_main as an approximation for the lock file timestamp.
  // See MAX_STARTUP_BUFFER for the buffer time period.
  TimeStamp mainTime = StartupTimeline::Get(StartupTimeline::MAIN);
  TimeStamp now = TimeStamp::Now();
  PRTime prNow = PR_Now();
  nsresult rv;

  if (mainTime.IsNull()) {
    NS_WARNING("Could not get StartupTimeline::MAIN time.");
  } else {
    uint64_t lockFileTime = ComputeAbsoluteTimestamp(prNow, now, mainTime);

    rv = Preferences::SetInt(kPrefLastSuccess,
      (int32_t)(lockFileTime / PR_USEC_PER_SEC));

    if (NS_FAILED(rv))
      NS_WARNING("Could not set startup crash detection pref.");
  }

  if (inSafeMode && mIsSafeModeNecessary) {
    // On a successful startup in automatic safe mode, allow the user one more crash
    // in regular mode before returning to safe mode.
    int32_t maxResumedCrashes = 0;
    int32_t prefType;
    rv = Preferences::GetDefaultRootBranch()->GetPrefType(kPrefMaxResumedCrashes, &prefType);
    NS_ENSURE_SUCCESS(rv, rv);
    if (prefType == nsIPrefBranch::PREF_INT) {
      rv = Preferences::GetInt(kPrefMaxResumedCrashes, &maxResumedCrashes);
      NS_ENSURE_SUCCESS(rv, rv);
    }
    rv = Preferences::SetInt(kPrefRecentCrashes, maxResumedCrashes);
    NS_ENSURE_SUCCESS(rv, rv);
  } else if (!inSafeMode) {
    // clear the count of recent crashes after a succesful startup when not in safe mode
    rv = Preferences::ClearUser(kPrefRecentCrashes);
    if (NS_FAILED(rv)) NS_WARNING("Could not clear startup crash count.");
  }
  nsCOMPtr<nsIPrefService> prefs = Preferences::GetService();
  rv = prefs->SavePrefFile(nullptr); // flush prefs to disk since we are tracking crashes

  return rv;
}
DOMTimeMilliSec
nsDOMNavigationTiming::TimeStampToDOM(TimeStamp aStamp) const
{
  if (aStamp.IsNull()) {
    return 0;
  }

  TimeDuration duration = aStamp - mNavigationStartTimeStamp;
  return GetNavigationStart() + static_cast<int64_t>(duration.ToMilliseconds());
}
int32_t
nsSocketTransportService::Poll(uint32_t *interval,
                               TimeDuration *pollDuration)
{
    PRPollDesc *pollList;
    uint32_t pollCount;
    PRIntervalTime pollTimeout;
    *pollDuration = 0;

    // If there are pending events for this thread then
    // DoPollIteration() should service the network without blocking.
    bool pendingEvents = false;
    mRawThread->HasPendingEvents(&pendingEvents);

    if (mPollList[0].fd) {
        mPollList[0].out_flags = 0;
        pollList = mPollList;
        pollCount = mActiveCount + 1;
        pollTimeout = pendingEvents ? PR_INTERVAL_NO_WAIT : PollTimeout();
    }
    else {
        // no pollable event, so busy wait...
        pollCount = mActiveCount;
        if (pollCount)
            pollList = &mPollList[1];
        else
            pollList = nullptr;
        pollTimeout =
            pendingEvents ? PR_INTERVAL_NO_WAIT : PR_MillisecondsToInterval(25);
    }

    PRIntervalTime ts = PR_IntervalNow();

    TimeStamp pollStart;
    if (mTelemetryEnabledPref) {
        pollStart = TimeStamp::NowLoRes();
    }

    SOCKET_LOG(("    timeout = %i milliseconds\n",
         PR_IntervalToMilliseconds(pollTimeout)));
    int32_t rv = PR_Poll(pollList, pollCount, pollTimeout);

    PRIntervalTime passedInterval = PR_IntervalNow() - ts;

    if (mTelemetryEnabledPref && !pollStart.IsNull()) {
        *pollDuration = TimeStamp::NowLoRes() - pollStart;
    }

    SOCKET_LOG(("    ...returned after %i milliseconds\n",
         PR_IntervalToMilliseconds(passedInterval))); 

    *interval = PR_IntervalToSeconds(passedInterval);
    return rv;
}
Beispiel #7
0
TimeStamp
FPSCounter::GetNextTimeStamp()
{
  TimeStamp timestamp = mFrameTimestamps[mIteratorIndex--];
  MOZ_ASSERT(!timestamp.IsNull(), "Reading Invalid Timestamp Data");

  if (mIteratorIndex == -1) {
    mIteratorIndex = kMaxFrames - 1;
  }
  return timestamp;
}
static PLDHashOperator
BackdateTimeStampsEnumerator(nsISupports *aKey, TimeStamp &aTimeStamp,
                             void* aClosure)
{
  TimeStamp *minTimeStamp = static_cast<TimeStamp*>(aClosure);

  if (!aTimeStamp.IsNull() && aTimeStamp > *minTimeStamp) {
    aTimeStamp = *minTimeStamp;
  }

  return PL_DHASH_NEXT;
}
Beispiel #9
0
static ImageHost::Bias
UpdateBias(const TimeStamp& aCompositionTime,
           const TimeStamp& aCompositedImageTime,
           const TimeStamp& aNextImageTime, // may be null
           ImageHost::Bias aBias)
{
  if (aCompositedImageTime.IsNull()) {
    return ImageHost::BIAS_NONE;
  }
  TimeDuration threshold = TimeDuration::FromMilliseconds(1.0);
  if (aCompositionTime - aCompositedImageTime < threshold &&
      aCompositionTime - aCompositedImageTime > -threshold) {
    // The chosen frame's time is very close to the composition time (probably
    // just before the current composition time, but due to previously set
    // negative bias, it could be just after the current composition time too).
    // If the inter-frame time is almost exactly equal to (a multiple of)
    // the inter-composition time, then we're in a dangerous situation because
    // jitter might cause frames to fall one side or the other of the
    // composition times, causing many frames to be skipped or duplicated.
    // Try to prevent that by adding a negative bias to the frame times during
    // the next composite; that should ensure the next frame's time is treated
    // as falling just before a composite time.
    return ImageHost::BIAS_NEGATIVE;
  }
  if (!aNextImageTime.IsNull() &&
      aNextImageTime - aCompositionTime < threshold &&
      aNextImageTime - aCompositionTime > -threshold) {
    // The next frame's time is very close to our composition time (probably
    // just after the current composition time, but due to previously set
    // positive bias, it could be just before the current composition time too).
    // We're in a dangerous situation because jitter might cause frames to
    // fall one side or the other of the composition times, causing many frames
    // to be skipped or duplicated.
    // Try to prevent that by adding a negative bias to the frame times during
    // the next composite; that should ensure the next frame's time is treated
    // as falling just before a composite time.
    return ImageHost::BIAS_POSITIVE;
  }
  return ImageHost::BIAS_NONE;
}
int32_t
nsSocketTransportService::Poll(bool wait, uint32_t *interval,
                               TimeDuration *pollDuration)
{
    PRPollDesc *pollList;
    uint32_t pollCount;
    PRIntervalTime pollTimeout;
    *pollDuration = 0;

    if (mPollList[0].fd) {
        mPollList[0].out_flags = 0;
        pollList = mPollList;
        pollCount = mActiveCount + 1;
        pollTimeout = PollTimeout();
    }
    else {
        // no pollable event, so busy wait...
        pollCount = mActiveCount;
        if (pollCount)
            pollList = &mPollList[1];
        else
            pollList = nullptr;
        pollTimeout = PR_MillisecondsToInterval(25);
    }

    if (!wait)
        pollTimeout = PR_INTERVAL_NO_WAIT;

    PRIntervalTime ts = PR_IntervalNow();

    TimeStamp pollStart;
    if (mTelemetryEnabledPref) {
        pollStart = TimeStamp::NowLoRes();
    }

    SOCKET_LOG(("    timeout = %i milliseconds\n",
         PR_IntervalToMilliseconds(pollTimeout)));
    int32_t rv = PR_Poll(pollList, pollCount, pollTimeout);

    PRIntervalTime passedInterval = PR_IntervalNow() - ts;

    if (mTelemetryEnabledPref && !pollStart.IsNull()) {
        *pollDuration = TimeStamp::NowLoRes() - pollStart;
    }

    SOCKET_LOG(("    ...returned after %i milliseconds\n",
         PR_IntervalToMilliseconds(passedInterval))); 

    *interval = PR_IntervalToSeconds(passedInterval);
    return rv;
}
bool
KeyframeEffectReadOnly::CanThrottleTransformChanges(nsIFrame& aFrame) const
{
  // If we know that the animation cannot cause overflow,
  // we can just disable flushes for this animation.

  // If we don't show scrollbars, we don't care about overflow.
  if (LookAndFeel::GetInt(LookAndFeel::eIntID_ShowHideScrollbars) == 0) {
    return true;
  }

  nsPresContext* presContext = GetPresContext();
  // CanThrottleTransformChanges is only called as part of a refresh driver tick
  // in which case we expect to has a pres context.
  MOZ_ASSERT(presContext);

  TimeStamp now =
    presContext->RefreshDriver()->MostRecentRefresh();

  EffectSet* effectSet = EffectSet::GetEffectSet(mTarget->mElement,
                                                 mTarget->mPseudoType);
  MOZ_ASSERT(effectSet, "CanThrottleTransformChanges is expected to be called"
                        " on an effect in an effect set");
  MOZ_ASSERT(mAnimation, "CanThrottleTransformChanges is expected to be called"
                         " on an effect with a parent animation");
  TimeStamp animationRuleRefreshTime =
    effectSet->AnimationRuleRefreshTime(mAnimation->CascadeLevel());
  // If this animation can cause overflow, we can throttle some of the ticks.
  if (!animationRuleRefreshTime.IsNull() &&
      (now - animationRuleRefreshTime) < OverflowRegionRefreshInterval()) {
    return true;
  }

  // If the nearest scrollable ancestor has overflow:hidden,
  // we don't care about overflow.
  nsIScrollableFrame* scrollable =
    nsLayoutUtils::GetNearestScrollableFrame(&aFrame);
  if (!scrollable) {
    return true;
  }

  ScrollbarStyles ss = scrollable->GetScrollbarStyles();
  if (ss.mVertical == NS_STYLE_OVERFLOW_HIDDEN &&
      ss.mHorizontal == NS_STYLE_OVERFLOW_HIDDEN &&
      scrollable->GetLogicalScrollPosition() == nsPoint(0, 0)) {
    return true;
  }

  return false;
}
Beispiel #12
0
// aID is a sub-identifier (in particular a specific MediaStramTrack)
void AsyncLatencyLogger::WriteLog(LatencyLogIndex aIndex, uint64_t aID, int64_t aValue,
                                  TimeStamp aTimeStamp)
{
  if (aTimeStamp.IsNull()) {
    MOZ_LOG(GetLatencyLog(), LogLevel::Debug,
      ("Latency: %s,%" PRIu64 ",%" PRId64 ",%" PRId64,
       LatencyLogIndex2Strings[aIndex], aID, GetTimeStamp(), aValue));
  } else {
    MOZ_LOG(GetLatencyLog(), LogLevel::Debug,
      ("Latency: %s,%" PRIu64 ",%" PRId64 ",%" PRId64 ",%" PRId64,
       LatencyLogIndex2Strings[aIndex], aID, GetTimeStamp(), aValue,
       static_cast<int64_t>((aTimeStamp - gAsyncLogger->mStart).ToMilliseconds())));
  }
}
Beispiel #13
0
// aID is a sub-identifier (in particular a specific MediaStramTrack)
void AsyncLatencyLogger::WriteLog(LatencyLogIndex aIndex, uint64_t aID, int64_t aValue,
                                  TimeStamp aTimeStamp)
{
  if (aTimeStamp.IsNull()) {
    PR_LOG(GetLatencyLog(), PR_LOG_DEBUG,
      ("Latency: %s,%llu,%lld,%lld",
       LatencyLogIndex2Strings[aIndex], aID, GetTimeStamp(), aValue));
  } else {
    PR_LOG(GetLatencyLog(), PR_LOG_DEBUG,
      ("Latency: %s,%llu,%lld,%lld,%lld",
       LatencyLogIndex2Strings[aIndex], aID, GetTimeStamp(), aValue,
       static_cast<int64_t>((aTimeStamp - gAsyncLogger->mStart).ToMilliseconds())));
  }
}
Beispiel #14
0
Nullable<TimeDuration> DocumentTimeline::ToTimelineTime(
    const TimeStamp& aTimeStamp) const {
  Nullable<TimeDuration> result;  // Initializes to null
  if (aTimeStamp.IsNull()) {
    return result;
  }

  nsDOMNavigationTiming* timing = mDocument->GetNavigationTiming();
  if (MOZ_UNLIKELY(!timing)) {
    return result;
  }

  result.SetValue(aTimeStamp - timing->GetNavigationStartTimeStamp() -
                  mOriginTime);
  return result;
}
Beispiel #15
0
void mozilla_sampler_responsiveness(const TimeStamp& aTime)
{
  if (!sLastTracerEvent.IsNull()) {
    if (sResponsivenessLoc == 100) {
      for(size_t i = 0; i < 100-1; i++) {
        sResponsivenessTimes[i] = sResponsivenessTimes[i+1];
      }
      sResponsivenessLoc--;
    }
    TimeDuration delta = aTime - sLastTracerEvent;
    sResponsivenessTimes[sResponsivenessLoc++] = delta.ToMilliseconds();
  }
  sCurrentEventGeneration++;

  sLastTracerEvent = aTime;
}
void
LayerManagerComposite::EndTransaction(const TimeStamp& aTimeStamp,
                                      EndTransactionFlags aFlags)
{
  NS_ASSERTION(mInTransaction, "Didn't call BeginTransaction?");
  NS_ASSERTION(!(aFlags & END_NO_COMPOSITE),
               "Shouldn't get END_NO_COMPOSITE here");
  mInTransaction = false;
  mRenderStartTime = TimeStamp::Now();

  if (!mIsCompositorReady) {
    return;
  }
  mIsCompositorReady = false;

#ifdef MOZ_LAYERS_HAVE_LOG
  MOZ_LAYERS_LOG(("  ----- (beginning paint)"));
  Log();
#endif

  if (mDestroyed) {
    NS_WARNING("Call on destroyed layer manager");
    return;
  }

  // Set composition timestamp here because we need it in
  // ComputeEffectiveTransforms (so the correct video frame size is picked) and
  // also to compute invalid regions properly.
  mCompositor->SetCompositionTime(aTimeStamp);

  if (mRoot && !(aFlags & END_NO_IMMEDIATE_REDRAW)) {
    MOZ_ASSERT(!aTimeStamp.IsNull());
    UpdateAndRender();
    mCompositor->FlushPendingNotifyNotUsed();
  } else {
    // Modified the layer tree.
    mGeometryChanged = true;
  }

  mCompositor->ClearTargetContext();
  mTarget = nullptr;

#ifdef MOZ_LAYERS_HAVE_LOG
  Log();
  MOZ_LAYERS_LOG(("]----- EndTransaction"));
#endif
}
Beispiel #17
0
bool
SpdyPushedStream3::IsOrphaned(TimeStamp now)
{
  MOZ_ASSERT(!now.IsNull());

  // if spdy is not transmitting, and is also not connected to a consumer
  // stream, and its been like that for too long then it is oprhaned

  if (mConsumerStream)
    return false;

  bool rv = ((now - mLastRead).ToSeconds() > 30.0);
  if (rv) {
    LOG3(("SpdyPushCache::IsOrphaned 0x%X IsOrphaned %3.2f\n",
          mStreamID, (now - mLastRead).ToSeconds()));
  }
  return rv;
}
void mozilla_sampler_responsiveness(TimeStamp aTime)
{
  if (!sLastTracerEvent.IsNull()) {
    if (sResponsivenessLoc == 100) {
      for(size_t i = 0; i < 100-1; i++) {
        sResponsivenessTimes[i] = sResponsivenessTimes[i+1];
      }
      sResponsivenessLoc--;
      //for(size_t i = 0; i < 100; i++) {
      //  sResponsivenessTimes[i] = 0;
      //}
      //sResponsivenessLoc = 0;
    }
    TimeDuration delta = aTime - sLastTracerEvent;
    sResponsivenessTimes[sResponsivenessLoc++] = delta.ToMilliseconds();
  }

  sLastTracerEvent = aTime;
}
Beispiel #19
0
bool
CompositorParent::SetTestSampleTime(LayerTransactionParent* aLayerTree,
                                    const TimeStamp& aTime)
{
  if (aTime.IsNull()) {
    return false;
  }

  mIsTesting = true;
  mTestTime = aTime;

  // Update but only if we were already scheduled to animate
  if (mCompositionManager && mCurrentCompositeTask) {
    AutoResolveRefLayers resolve(mCompositionManager);
    bool requestNextFrame = mCompositionManager->TransformShadowTree(aTime);
    if (!requestNextFrame) {
      CancelCurrentCompositeTask();
    }
  }

  return true;
}
Beispiel #20
0
bool
Http2PushedStream::IsOrphaned(TimeStamp now)
{
    MOZ_ASSERT(!now.IsNull());

    // if session is not transmitting, and is also not connected to a consumer
    // stream, and its been like that for too long then it is oprhaned

    if (mConsumerStream || mDeferCleanupOnPush) {
        return false;
    }

    if (mOnPushFailed) {
        return true;
    }

    bool rv = ((now - mLastRead).ToSeconds() > 30.0);
    if (rv) {
        LOG3(("Http2PushedStream:IsOrphaned 0x%X IsOrphaned %3.2f\n",
              mStreamID, (now - mLastRead).ToSeconds()));
    }
    return rv;
}
void VideoFrameContainer::SetCurrentFrame(const gfxIntSize& aIntrinsicSize,
                                          Image* aImage,
                                          TimeStamp aTargetTime)
{
  MutexAutoLock lock(mMutex);

  if (aIntrinsicSize != mIntrinsicSize) {
    mIntrinsicSize = aIntrinsicSize;
    mIntrinsicSizeChanged = true;
  }

  gfxIntSize oldFrameSize = mImageContainer->GetCurrentSize();
  TimeStamp lastPaintTime = mImageContainer->GetPaintTime();
  if (!lastPaintTime.IsNull() && !mPaintTarget.IsNull()) {
    mPaintDelay = lastPaintTime - mPaintTarget;
  }

  // When using the OMX decoder, destruction of the current image can indirectly
  //  block on main thread I/O. If we let this happen while holding onto
  //  |mImageContainer|'s lock, then when the main thread then tries to
  //  composite it can then block on |mImageContainer|'s lock, causing a
  //  deadlock. We use this hack to defer the destruction of the current image
  //  until it is safe.
  nsRefPtr<Image> kungFuDeathGrip;
  kungFuDeathGrip = mImageContainer->LockCurrentImage();
  mImageContainer->UnlockCurrentImage();

  mImageContainer->SetCurrentImage(aImage);
  gfxIntSize newFrameSize = mImageContainer->GetCurrentSize();
  if (oldFrameSize != newFrameSize) {
    mImageSizeChanged = true;
    mNeedInvalidation = true;
  }

  mPaintTarget = aTargetTime;
}
Beispiel #22
0
void
nsLoadGroup::TelemetryReportChannel(nsITimedChannel *aTimedChannel,
                                    bool aDefaultRequest)
{
    nsresult rv;
    bool timingEnabled;
    rv = aTimedChannel->GetTimingEnabled(&timingEnabled);
    if (NS_FAILED(rv) || !timingEnabled)
        return;

    TimeStamp asyncOpen;
    rv = aTimedChannel->GetAsyncOpen(&asyncOpen);
    // We do not check !asyncOpen.IsNull() bellow, prevent ASSERTIONs this way
    if (NS_FAILED(rv) || asyncOpen.IsNull())
        return;

    TimeStamp cacheReadStart;
    rv = aTimedChannel->GetCacheReadStart(&cacheReadStart);
    if (NS_FAILED(rv))
        return;

    TimeStamp cacheReadEnd;
    rv = aTimedChannel->GetCacheReadEnd(&cacheReadEnd);
    if (NS_FAILED(rv))
        return;

    TimeStamp domainLookupStart;
    rv = aTimedChannel->GetDomainLookupStart(&domainLookupStart);
    if (NS_FAILED(rv))
        return;

    TimeStamp domainLookupEnd;
    rv = aTimedChannel->GetDomainLookupEnd(&domainLookupEnd);
    if (NS_FAILED(rv))
        return;

    TimeStamp connectStart;
    rv = aTimedChannel->GetConnectStart(&connectStart);
    if (NS_FAILED(rv))
        return;

    TimeStamp connectEnd;
    rv = aTimedChannel->GetConnectEnd(&connectEnd);
    if (NS_FAILED(rv))
        return;

    TimeStamp requestStart;
    rv = aTimedChannel->GetRequestStart(&requestStart);
    if (NS_FAILED(rv))
        return;

    TimeStamp responseStart;
    rv = aTimedChannel->GetResponseStart(&responseStart);
    if (NS_FAILED(rv))
        return;

    TimeStamp responseEnd;
    rv = aTimedChannel->GetResponseEnd(&responseEnd);
    if (NS_FAILED(rv))
        return;

#define HTTP_REQUEST_HISTOGRAMS(prefix)                                        \
    if (!domainLookupStart.IsNull()) {                                         \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_DNS_ISSUE_TIME,                         \
            asyncOpen, domainLookupStart);                                     \
    }                                                                          \
                                                                               \
    if (!domainLookupStart.IsNull() && !domainLookupEnd.IsNull()) {            \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_DNS_LOOKUP_TIME,                        \
            domainLookupStart, domainLookupEnd);                               \
    }                                                                          \
                                                                               \
    if (!connectStart.IsNull() && !connectEnd.IsNull()) {                      \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_TCP_CONNECTION,                         \
            connectStart, connectEnd);                                         \
    }                                                                          \
                                                                               \
                                                                               \
    if (!requestStart.IsNull() && !responseEnd.IsNull()) {                     \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_OPEN_TO_FIRST_SENT,                     \
            asyncOpen, requestStart);                                          \
                                                                               \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_FIRST_SENT_TO_LAST_RECEIVED,            \
            requestStart, responseEnd);                                        \
                                                                               \
        if (cacheReadStart.IsNull() && !responseStart.IsNull()) {              \
            Telemetry::AccumulateTimeDelta(                                    \
                Telemetry::HTTP_##prefix##_OPEN_TO_FIRST_RECEIVED,             \
                asyncOpen, responseStart);                                     \
        }                                                                      \
    }                                                                          \
                                                                               \
    if (!cacheReadStart.IsNull() && !cacheReadEnd.IsNull()) {                  \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_OPEN_TO_FIRST_FROM_CACHE,               \
            asyncOpen, cacheReadStart);                                        \
                                                                               \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_CACHE_READ_TIME,                        \
            cacheReadStart, cacheReadEnd);                                     \
                                                                               \
        if (!requestStart.IsNull() && !responseEnd.IsNull()) {                 \
            Telemetry::AccumulateTimeDelta(                                    \
                Telemetry::HTTP_##prefix##_REVALIDATION,                       \
                requestStart, responseEnd);                                    \
        }                                                                      \
    }                                                                          \
                                                                               \
    if (!cacheReadEnd.IsNull()) {                                              \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_COMPLETE_LOAD,                          \
            asyncOpen, cacheReadEnd);                                          \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_COMPLETE_LOAD_CACHED,                   \
            asyncOpen, cacheReadEnd);                                          \
    }                                                                          \
    else if (!responseEnd.IsNull()) {                                          \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_COMPLETE_LOAD,                          \
            asyncOpen, responseEnd);                                           \
        Telemetry::AccumulateTimeDelta(                                        \
            Telemetry::HTTP_##prefix##_COMPLETE_LOAD_NET,                      \
            asyncOpen, responseEnd);                                           \
    }

    if (aDefaultRequest) {
        HTTP_REQUEST_HISTOGRAMS(PAGE)
    } else {
Beispiel #23
0
NS_IMETHODIMP
nsLoadGroup::RemoveRequest(nsIRequest *request, nsISupports* ctxt,
                           nsresult aStatus)
{
    NS_ENSURE_ARG_POINTER(request);
    nsresult rv;

#if defined(PR_LOGGING)
    {
        nsAutoCString nameStr;
        request->GetName(nameStr);
        LOG(("LOADGROUP [%x]: Removing request %x %s status %x (count=%d).\n",
            this, request, nameStr.get(), aStatus, mRequests.entryCount-1));
    }
#endif

    // Make sure we have a owning reference to the request we're about
    // to remove.

    nsCOMPtr<nsIRequest> kungFuDeathGrip(request);

    //
    // Remove the request from the group.  If this fails, it means that
    // the request was *not* in the group so do not update the foreground
    // count or it will get messed up...
    //
    RequestMapEntry *entry =
        static_cast<RequestMapEntry *>
                   (PL_DHashTableOperate(&mRequests, request,
                                        PL_DHASH_LOOKUP));

    if (PL_DHASH_ENTRY_IS_FREE(entry)) {
        LOG(("LOADGROUP [%x]: Unable to remove request %x. Not in group!\n",
            this, request));

        return NS_ERROR_FAILURE;
    }

    PL_DHashTableRawRemove(&mRequests, entry);

    // Collect telemetry stats only when default request is a timed channel.
    // Don't include failed requests in the timing statistics.
    if (mDefaultLoadIsTimed && NS_SUCCEEDED(aStatus)) {
        nsCOMPtr<nsITimedChannel> timedChannel = do_QueryInterface(request);
        if (timedChannel) {
            // Figure out if this request was served from the cache
            ++mTimedRequests;
            TimeStamp timeStamp;
            rv = timedChannel->GetCacheReadStart(&timeStamp);
            if (NS_SUCCEEDED(rv) && !timeStamp.IsNull())
                ++mCachedRequests;

            rv = timedChannel->GetAsyncOpen(&timeStamp);
            if (NS_SUCCEEDED(rv) && !timeStamp.IsNull()) {
                Telemetry::AccumulateTimeDelta(
                    Telemetry::HTTP_SUBITEM_OPEN_LATENCY_TIME,
                    mDefaultRequestCreationTime, timeStamp);
            }

            rv = timedChannel->GetResponseStart(&timeStamp);
            if (NS_SUCCEEDED(rv) && !timeStamp.IsNull()) {
                Telemetry::AccumulateTimeDelta(
                    Telemetry::HTTP_SUBITEM_FIRST_BYTE_LATENCY_TIME,
                    mDefaultRequestCreationTime, timeStamp);
            }

            TelemetryReportChannel(timedChannel, false);
        }
    }

    if (mRequests.entryCount == 0) {
        TelemetryReport();
    }

    // Undo any group priority delta...
    if (mPriority != 0)
        RescheduleRequest(request, -mPriority);

    nsLoadFlags flags;
    rv = request->GetLoadFlags(&flags);
    if (NS_FAILED(rv)) return rv;

    if (!(flags & nsIRequest::LOAD_BACKGROUND)) {
        NS_ASSERTION(mForegroundCount > 0, "ForegroundCount messed up");
        mForegroundCount -= 1;

        // Fire the OnStopRequest out to the observer...
        nsCOMPtr<nsIRequestObserver> observer = do_QueryReferent(mObserver);
        if (observer) {
            LOG(("LOADGROUP [%x]: Firing OnStopRequest for request %x."
                 "(foreground count=%d).\n", this, request, mForegroundCount));

            rv = observer->OnStopRequest(request, ctxt, aStatus);

#if defined(PR_LOGGING)
            if (NS_FAILED(rv)) {
                LOG(("LOADGROUP [%x]: OnStopRequest for request %x FAILED.\n",
                    this, request));
            }
#endif
        }

        // If that was the last request -> remove ourselves from loadgroup
        if (mForegroundCount == 0 && mLoadGroup) {
            mLoadGroup->RemoveRequest(this, nullptr, aStatus);
        }
    }

    return rv;
}
Beispiel #24
0
void
DecodedStream::SendVideo(bool aIsSameOrigin, const PrincipalHandle& aPrincipalHandle)
{
  AssertOwnerThread();

  if (!mInfo.HasVideo()) {
    return;
  }

  VideoSegment output;
  TrackID videoTrackId = mInfo.mVideo.mTrackId;
  AutoTArray<RefPtr<MediaData>, 10> video;
  SourceMediaStream* sourceStream = mData->mStream;

  // It's OK to hold references to the VideoData because VideoData
  // is ref-counted.
  mVideoQueue.GetElementsAfter(mData->mNextVideoTime, &video);

  // tracksStartTimeStamp might be null when the SourceMediaStream not yet
  // be added to MediaStreamGraph.
  TimeStamp tracksStartTimeStamp = sourceStream->GetStreamTracksStrartTimeStamp();
  if (tracksStartTimeStamp.IsNull()) {
    tracksStartTimeStamp = TimeStamp::Now();
  }

  for (uint32_t i = 0; i < video.Length(); ++i) {
    VideoData* v = video[i]->As<VideoData>();

    if (mData->mNextVideoTime < v->mTime) {
      // Write last video frame to catch up. mLastVideoImage can be null here
      // which is fine, it just means there's no video.

      // TODO: |mLastVideoImage| should come from the last image rendered
      // by the state machine. This will avoid the black frame when capture
      // happens in the middle of playback (especially in th middle of a
      // video frame). E.g. if we have a video frame that is 30 sec long
      // and capture happens at 15 sec, we'll have to append a black frame
      // that is 15 sec long.
      WriteVideoToMediaStream(sourceStream, mData->mLastVideoImage, v->mTime,
          mData->mNextVideoTime, mData->mLastVideoImageDisplaySize,
          tracksStartTimeStamp + TimeDuration::FromMicroseconds(v->mTime),
          &output, aPrincipalHandle);
      mData->mNextVideoTime = v->mTime;
    }

    if (mData->mNextVideoTime < v->GetEndTime()) {
      WriteVideoToMediaStream(sourceStream, v->mImage, v->GetEndTime(),
          mData->mNextVideoTime, v->mDisplay,
          tracksStartTimeStamp + TimeDuration::FromMicroseconds(v->GetEndTime()),
          &output, aPrincipalHandle);
      mData->mNextVideoTime = v->GetEndTime();
      mData->mLastVideoImage = v->mImage;
      mData->mLastVideoImageDisplaySize = v->mDisplay;
    }
  }

  // Check the output is not empty.
  if (output.GetLastFrame()) {
    mData->mEOSVideoCompensation = ZeroDurationAtLastChunk(output);
  }

  if (!aIsSameOrigin) {
    output.ReplaceWithDisabled();
  }

  if (output.GetDuration() > 0) {
    sourceStream->AppendToTrack(videoTrackId, &output);
  }

  if (mVideoQueue.IsFinished() && !mData->mHaveSentFinishVideo) {
    if (mData->mEOSVideoCompensation) {
      VideoSegment endSegment;
      // Calculate the deviation clock time from DecodedStream.
      int64_t deviation_usec = sourceStream->StreamTimeToMicroseconds(1);
      WriteVideoToMediaStream(sourceStream, mData->mLastVideoImage,
          mData->mNextVideoTime + deviation_usec, mData->mNextVideoTime,
          mData->mLastVideoImageDisplaySize,
          tracksStartTimeStamp + TimeDuration::FromMicroseconds(mData->mNextVideoTime + deviation_usec),
          &endSegment, aPrincipalHandle);
      mData->mNextVideoTime += deviation_usec;
      MOZ_ASSERT(endSegment.GetDuration() > 0);
      if (!aIsSameOrigin) {
        endSegment.ReplaceWithDisabled();
      }
      sourceStream->AppendToTrack(videoTrackId, &endSegment);
    }
    sourceStream->EndTrack(videoTrackId);
    mData->mHaveSentFinishVideo = true;
  }
}
void
ElementAnimations::EnsureStyleRuleFor(TimeStamp aRefreshTime,
                                      EventArray& aEventsToDispatch)
{
  if (!mNeedsRefreshes) {
    // All of our animations are paused or completed.
    mStyleRuleRefreshTime = aRefreshTime;
    return;
  }

  // mStyleRule may be null and valid, if we have no style to apply.
  if (mStyleRuleRefreshTime.IsNull() ||
      mStyleRuleRefreshTime != aRefreshTime) {
    mStyleRuleRefreshTime = aRefreshTime;
    mStyleRule = nsnull;
    // We'll set mNeedsRefreshes to true below in all cases where we need them.
    mNeedsRefreshes = false;

    // FIXME(spec): assume that properties in higher animations override
    // those in lower ones.
    // Therefore, we iterate from last animation to first.
    nsCSSPropertySet properties;

    for (PRUint32 animIdx = mAnimations.Length(); animIdx-- != 0; ) {
      ElementAnimation &anim = mAnimations[animIdx];

      if (anim.mProperties.Length() == 0 ||
          anim.mIterationDuration.ToMilliseconds() <= 0.0) {
        // No animation data.
        continue;
      }

      TimeDuration currentTimeDuration;
      if (anim.IsPaused()) {
        // FIXME: avoid recalculating every time
        currentTimeDuration = anim.mPauseStart - anim.mStartTime;
      } else {
        currentTimeDuration = aRefreshTime - anim.mStartTime;
      }

      // Set |currentIterationCount| to the (fractional) number of
      // iterations we've completed up to the current position.
      double currentIterationCount =
        currentTimeDuration / anim.mIterationDuration;
      bool dispatchStartOrIteration = false;
      if (currentIterationCount >= double(anim.mIterationCount)) {
        // Dispatch 'animationend' when needed.
        if (IsForElement() && 
            anim.mLastNotification !=
              ElementAnimation::LAST_NOTIFICATION_END) {
          anim.mLastNotification = ElementAnimation::LAST_NOTIFICATION_END;
          AnimationEventInfo ei(mElement, anim.mName, NS_ANIMATION_END,
                                currentTimeDuration);
          aEventsToDispatch.AppendElement(ei);
        }

        if (!anim.FillsForwards()) {
          // No animation data.
          continue;
        }
        currentIterationCount = double(anim.mIterationCount);
      } else {
        if (!anim.IsPaused()) {
          mNeedsRefreshes = true;
        }
        if (currentIterationCount < 0.0) {
          if (!anim.FillsBackwards()) {
            // No animation data.
            continue;
          }
          currentIterationCount = 0.0;
        } else {
          dispatchStartOrIteration = !anim.IsPaused();
        }
      }

      // Set |positionInIteration| to the position from 0% to 100% along
      // the keyframes.
      NS_ABORT_IF_FALSE(currentIterationCount >= 0.0, "must be positive");
      PRUint32 whichIteration = int(currentIterationCount);
      if (whichIteration == anim.mIterationCount && whichIteration != 0) {
        // When the animation's iteration count is an integer (as it
        // normally is), we need to end at 100% of its last iteration
        // rather than 0% of the next one (unless it's zero).
        --whichIteration;
      }
      double positionInIteration =
        currentIterationCount - double(whichIteration);
      bool thisIterationReverse = false;
      switch (anim.mDirection) {
        case NS_STYLE_ANIMATION_DIRECTION_NORMAL:
          thisIterationReverse = false;
          break;
        case NS_STYLE_ANIMATION_DIRECTION_REVERSE:
          thisIterationReverse = true;
          break;
        case NS_STYLE_ANIMATION_DIRECTION_ALTERNATE:
          thisIterationReverse = (whichIteration & 1) == 1;
          break;
        case NS_STYLE_ANIMATION_DIRECTION_ALTERNATE_REVERSE:
          thisIterationReverse = (whichIteration & 1) == 0;
          break;
      }
      if (thisIterationReverse) {
        positionInIteration = 1.0 - positionInIteration;
      }

      // Dispatch 'animationstart' or 'animationiteration' when needed.
      if (IsForElement() && dispatchStartOrIteration &&
          whichIteration != anim.mLastNotification) {
        // Notify 'animationstart' even if a negative delay puts us
        // past the first iteration.
        // Note that when somebody changes the animation-duration
        // dynamically, this will fire an extra iteration event
        // immediately in many cases.  It's not clear to me if that's the
        // right thing to do.
        PRUint32 message =
          anim.mLastNotification == ElementAnimation::LAST_NOTIFICATION_NONE
            ? NS_ANIMATION_START : NS_ANIMATION_ITERATION;
        anim.mLastNotification = whichIteration;
        AnimationEventInfo ei(mElement, anim.mName, message,
                              currentTimeDuration);
        aEventsToDispatch.AppendElement(ei);
      }

      NS_ABORT_IF_FALSE(0.0 <= positionInIteration &&
                          positionInIteration <= 1.0,
                        "position should be in [0-1]");

      for (PRUint32 propIdx = 0, propEnd = anim.mProperties.Length();
           propIdx != propEnd; ++propIdx)
      {
        const AnimationProperty &prop = anim.mProperties[propIdx];

        NS_ABORT_IF_FALSE(prop.mSegments[0].mFromKey == 0.0,
                          "incorrect first from key");
        NS_ABORT_IF_FALSE(prop.mSegments[prop.mSegments.Length() - 1].mToKey
                            == 1.0,
                          "incorrect last to key");

        if (properties.HasProperty(prop.mProperty)) {
          // A later animation already set this property.
          continue;
        }
        properties.AddProperty(prop.mProperty);

        NS_ABORT_IF_FALSE(prop.mSegments.Length() > 0,
                          "property should not be in animations if it "
                          "has no segments");

        // FIXME: Maybe cache the current segment?
        const AnimationPropertySegment *segment = prop.mSegments.Elements();
        while (segment->mToKey < positionInIteration) {
          NS_ABORT_IF_FALSE(segment->mFromKey < segment->mToKey,
                            "incorrect keys");
          ++segment;
          NS_ABORT_IF_FALSE(segment->mFromKey == (segment-1)->mToKey,
                            "incorrect keys");
        }
        NS_ABORT_IF_FALSE(segment->mFromKey < segment->mToKey,
                          "incorrect keys");
        NS_ABORT_IF_FALSE(segment - prop.mSegments.Elements() <
                            prop.mSegments.Length(),
                          "ran off end");

        if (!mStyleRule) {
          // Allocate the style rule now that we know we have animation data.
          mStyleRule = new css::AnimValuesStyleRule();
        }

        double positionInSegment = (positionInIteration - segment->mFromKey) /
                                   (segment->mToKey - segment->mFromKey);
        double valuePosition =
          segment->mTimingFunction.GetValue(positionInSegment);

        nsStyleAnimation::Value *val =
          mStyleRule->AddEmptyValue(prop.mProperty);

#ifdef DEBUG
        bool result =
#endif
          nsStyleAnimation::Interpolate(prop.mProperty,
                                        segment->mFromValue, segment->mToValue,
                                        valuePosition, *val);
        NS_ABORT_IF_FALSE(result, "interpolate must succeed now");
      }
    }
  }
}
NS_IMETHODIMP
nsSocketTransportService::Run()
{
    PR_SetCurrentThreadName("Socket Thread");

#ifdef MOZ_NUWA_PROCESS
    if (IsNuwaProcess()) {
        NuwaMarkCurrentThread(nullptr, nullptr);
    }
#endif

    SOCKET_LOG(("STS thread init\n"));

#if !defined(MOZILLA_XPCOMRT_API)
    psm::InitializeSSLServerCertVerificationThreads();
#endif // !defined(MOZILLA_XPCOMRT_API)

    gSocketThread = PR_GetCurrentThread();

    // add thread event to poll list (mThreadEvent may be nullptr)
    mPollList[0].fd = mThreadEvent;
    mPollList[0].in_flags = PR_POLL_READ;
    mPollList[0].out_flags = 0;

    nsIThread *thread = NS_GetCurrentThread();

    // hook ourselves up to observe event processing for this thread
    nsCOMPtr<nsIThreadInternal> threadInt = do_QueryInterface(thread);
    threadInt->SetObserver(this);

    // make sure the pseudo random number generator is seeded on this thread
    srand(static_cast<unsigned>(PR_Now()));

    // For the calculation of the duration of the last cycle (i.e. the last for-loop
    // iteration before shutdown).
    TimeStamp startOfCycleForLastCycleCalc;
    int numberOfPendingEventsLastCycle;

    // For measuring of the poll iteration duration without time spent blocked
    // in poll().
    TimeStamp pollCycleStart;
    // Time blocked in poll().
    TimeDuration singlePollDuration;

    // For calculating the time needed for a new element to run.
    TimeStamp startOfIteration;
    TimeStamp startOfNextIteration;
    int numberOfPendingEvents;

    // If there is too many pending events queued, we will run some poll()
    // between them and the following variable is cumulative time spent
    // blocking in poll().
    TimeDuration pollDuration;

    for (;;) {
        bool pendingEvents = false;
        thread->HasPendingEvents(&pendingEvents);

        numberOfPendingEvents = 0;
        numberOfPendingEventsLastCycle = 0;
        if (mTelemetryEnabledPref) {
            startOfCycleForLastCycleCalc = TimeStamp::NowLoRes();
            startOfNextIteration = TimeStamp::NowLoRes();
        }
        pollDuration = 0;

        do {
            if (mTelemetryEnabledPref) {
                pollCycleStart = TimeStamp::NowLoRes();
            }

            // If there are pending events for this thread then
            // DoPollIteration() should service the network without blocking.
            DoPollIteration(!pendingEvents, &singlePollDuration);

            if (mTelemetryEnabledPref && !pollCycleStart.IsNull()) {
                Telemetry::Accumulate(Telemetry::STS_POLL_BLOCK_TIME,
                                      singlePollDuration.ToMilliseconds());
                Telemetry::AccumulateTimeDelta(
                    Telemetry::STS_POLL_CYCLE,
                    pollCycleStart + singlePollDuration,
                    TimeStamp::NowLoRes());
                pollDuration += singlePollDuration;
            }

            // If nothing was pending before the poll, it might be now
            if (!pendingEvents) {
                thread->HasPendingEvents(&pendingEvents);
            }

            if (pendingEvents) {
                if (!mServingPendingQueue) {
                    nsresult rv = Dispatch(NS_NewRunnableMethod(this,
                        &nsSocketTransportService::MarkTheLastElementOfPendingQueue),
                        nsIEventTarget::DISPATCH_NORMAL);
                    if (NS_FAILED(rv)) {
                        NS_WARNING("Could not dispatch a new event on the "
                                   "socket thread.");
                    } else {
                        mServingPendingQueue = true;
                    }

                    if (mTelemetryEnabledPref) {
                        startOfIteration = startOfNextIteration;
                        // Everything that comes after this point will
                        // be served in the next iteration. If no even
                        // arrives, startOfNextIteration will be reset at the
                        // beginning of each for-loop.
                        startOfNextIteration = TimeStamp::NowLoRes();
                    }
                }
                TimeStamp eventQueueStart = TimeStamp::NowLoRes();
                do {
                    NS_ProcessNextEvent(thread);
                    numberOfPendingEvents++;
                    pendingEvents = false;
                    thread->HasPendingEvents(&pendingEvents);
                } while (pendingEvents && mServingPendingQueue &&
                         ((TimeStamp::NowLoRes() -
                           eventQueueStart).ToMilliseconds() <
                          mMaxTimePerPollIter));

                if (mTelemetryEnabledPref && !mServingPendingQueue &&
                    !startOfIteration.IsNull()) {
                    Telemetry::AccumulateTimeDelta(
                        Telemetry::STS_POLL_AND_EVENTS_CYCLE,
                        startOfIteration + pollDuration,
                        TimeStamp::NowLoRes());

                    Telemetry::Accumulate(
                        Telemetry::STS_NUMBER_OF_PENDING_EVENTS,
                        numberOfPendingEvents);

                    numberOfPendingEventsLastCycle += numberOfPendingEvents;
                    numberOfPendingEvents = 0;
                    pollDuration = 0;
                }
            }
        } while (pendingEvents);

        bool goingOffline = false;
        // now that our event queue is empty, check to see if we should exit
        {
            DebugMutexAutoLock lock(mLock);
            if (mShuttingDown) {
                if (mTelemetryEnabledPref &&
                    !startOfCycleForLastCycleCalc.IsNull()) {
                    Telemetry::Accumulate(
                        Telemetry::STS_NUMBER_OF_PENDING_EVENTS_IN_THE_LAST_CYCLE,
                        numberOfPendingEventsLastCycle);
                    Telemetry::AccumulateTimeDelta(
                        Telemetry::STS_POLL_AND_EVENT_THE_LAST_CYCLE,
                        startOfCycleForLastCycleCalc,
                        TimeStamp::NowLoRes());
                }
                break;
            }
            if (mGoingOffline) {
                mGoingOffline = false;
                goingOffline = true;
            }
        }
        // Avoid potential deadlock
        if (goingOffline)
            Reset(true);
    }

    SOCKET_LOG(("STS shutting down thread\n"));

    // detach all sockets, including locals
    Reset(false);

    // Final pass over the event queue. This makes sure that events posted by
    // socket detach handlers get processed.
    NS_ProcessPendingEvents(thread);

    gSocketThread = nullptr;

#if !defined(MOZILLA_XPCOMRT_API)
    psm::StopSSLServerCertVerificationThreads();
#endif // !defined(MOZILLA_XPCOMRT_API)

    SOCKET_LOG(("STS thread exit\n"));
    return NS_OK;
}
void
TimeoutManager::RunTimeout(const TimeStamp& aNow, const TimeStamp& aTargetDeadline)
{
  MOZ_DIAGNOSTIC_ASSERT(!aNow.IsNull());
  MOZ_DIAGNOSTIC_ASSERT(!aTargetDeadline.IsNull());

  MOZ_ASSERT_IF(mWindow.IsFrozen(), mWindow.IsSuspended());
  if (mWindow.IsSuspended()) {
    return;
  }

  // Limit the overall time spent in RunTimeout() to reduce jank.
  uint32_t totalTimeLimitMS = std::max(1u, gMaxConsecutiveCallbacksMilliseconds);
  const TimeDuration totalTimeLimit =
    TimeDuration::Min(TimeDuration::FromMilliseconds(totalTimeLimitMS),
                      TimeDuration::Max(TimeDuration(), mExecutionBudget));

  // Allow up to 25% of our total time budget to be used figuring out which
  // timers need to run.  This is the initial loop in this method.
  const TimeDuration initialTimeLimit =
    TimeDuration::FromMilliseconds(totalTimeLimit.ToMilliseconds() / 4);

  // Ammortize overhead from from calling TimeStamp::Now() in the initial
  // loop, though, by only checking for an elapsed limit every N timeouts.
  const uint32_t kNumTimersPerInitialElapsedCheck = 100;

  // Start measuring elapsed time immediately.  We won't potentially expire
  // the time budget until at least one Timeout has run, though.
  TimeStamp now(aNow);
  TimeStamp start = now;

  uint32_t firingId = CreateFiringId();
  auto guard = MakeScopeExit([&] {
    DestroyFiringId(firingId);
  });

  // Make sure that the window and the script context don't go away as
  // a result of running timeouts
  nsCOMPtr<nsIScriptGlobalObject> windowKungFuDeathGrip(&mWindow);
  // Silence the static analysis error about windowKungFuDeathGrip.  Accessing
  // members of mWindow here is safe, because the lifetime of TimeoutManager is
  // the same as the lifetime of the containing nsGlobalWindow.
  Unused << windowKungFuDeathGrip;

  // A native timer has gone off. See which of our timeouts need
  // servicing
  TimeStamp deadline;

  if (aTargetDeadline > now) {
    // The OS timer fired early (which can happen due to the timers
    // having lower precision than TimeStamp does).  Set |deadline| to
    // be the time when the OS timer *should* have fired so that any
    // timers that *should* have fired *will* be fired now.

    deadline = aTargetDeadline;
  } else {
    deadline = now;
  }

  TimeStamp nextDeadline;
  uint32_t numTimersToRun = 0;

  // The timeout list is kept in deadline order. Discover the latest timeout
  // whose deadline has expired. On some platforms, native timeout events fire
  // "early", but we handled that above by setting deadline to aTargetDeadline
  // if the timer fired early.  So we can stop walking if we get to timeouts
  // whose When() is greater than deadline, since once that happens we know
  // nothing past that point is expired.
  {
    // Use a nested scope in order to make sure the strong references held by
    // the iterator are freed after the loop.
    OrderedTimeoutIterator expiredIter(mNormalTimeouts, mTrackingTimeouts);

    while (true) {
      Timeout* timeout = expiredIter.Next();
      if (!timeout || totalTimeLimit.IsZero() || timeout->When() > deadline) {
        if (timeout) {
          nextDeadline = timeout->When();
        }
        break;
      }

      if (IsInvalidFiringId(timeout->mFiringId)) {
        // Mark any timeouts that are on the list to be fired with the
        // firing depth so that we can reentrantly run timeouts
        timeout->mFiringId = firingId;

        numTimersToRun += 1;

        // Run only a limited number of timers based on the configured maximum.
        if (numTimersToRun % kNumTimersPerInitialElapsedCheck == 0) {
          now = TimeStamp::Now();
          TimeDuration elapsed(now - start);
          if (elapsed >= initialTimeLimit) {
            nextDeadline = timeout->When();
            break;
          }
        }
      }

      expiredIter.UpdateIterator();
    }
  }

  now = TimeStamp::Now();

  // Wherever we stopped in the timer list, schedule the executor to
  // run for the next unexpired deadline.  Note, this *must* be done
  // before we start executing any content script handlers.  If one
  // of them spins the event loop the executor must already be scheduled
  // in order for timeouts to fire properly.
  if (!nextDeadline.IsNull()) {
    // Note, we verified the window is not suspended at the top of
    // method and the window should not have been suspended while
    // executing the loop above since it doesn't call out to js.
    MOZ_DIAGNOSTIC_ASSERT(!mWindow.IsSuspended());
    MOZ_ALWAYS_SUCCEEDS(MaybeSchedule(nextDeadline, now));
  }

  // Maybe the timeout that the event was fired for has been deleted
  // and there are no others timeouts with deadlines that make them
  // eligible for execution yet. Go away.
  if (!numTimersToRun) {
    return;
  }

  // Now we need to search the normal and tracking timer list at the same
  // time to run the timers in the scheduled order.

  // We stop iterating each list when we go past the last expired timeout from
  // that list that we have observed above.  That timeout will either be the
  // next item after the last timeout we looked at or nullptr if we have
  // exhausted the entire list while looking for the last expired timeout.
  {
    // Use a nested scope in order to make sure the strong references held by
    // the iterator are freed after the loop.
    OrderedTimeoutIterator runIter(mNormalTimeouts, mTrackingTimeouts);
    while (true) {
      RefPtr<Timeout> timeout = runIter.Next();
      if (!timeout) {
        // We have run out of timeouts!
        break;
      }
      runIter.UpdateIterator();

      // We should only execute callbacks for the set of expired Timeout
      // objects we computed above.
      if (timeout->mFiringId != firingId) {
        // If the FiringId does not match, but is still valid, then this is
        // a TImeout for another RunTimeout() on the call stack.  Just
        // skip it.
        if (IsValidFiringId(timeout->mFiringId)) {
          continue;
        }

        // If, however, the FiringId is invalid then we have reached Timeout
        // objects beyond the list we calculated above.  This can happen
        // if the Timeout just beyond our last expired Timeout is cancelled
        // by one of the callbacks we've just executed.  In this case we
        // should just stop iterating.  We're done.
        else {
          break;
        }
      }

      MOZ_ASSERT_IF(mWindow.IsFrozen(), mWindow.IsSuspended());
      if (mWindow.IsSuspended()) {
        break;
      }

      // The timeout is on the list to run at this depth, go ahead and
      // process it.

      // Get the script context (a strong ref to prevent it going away)
      // for this timeout and ensure the script language is enabled.
      nsCOMPtr<nsIScriptContext> scx = mWindow.GetContextInternal();

      if (!scx) {
        // No context means this window was closed or never properly
        // initialized for this language.  This timer will never fire
        // so just remove it.
        timeout->remove();
        continue;
      }

      // This timeout is good to run
      bool timeout_was_cleared = mWindow.RunTimeoutHandler(timeout, scx);

      MOZ_LOG(gLog, LogLevel::Debug,
              ("Run%s(TimeoutManager=%p, timeout=%p, tracking=%d) returned %d\n", timeout->mIsInterval ? "Interval" : "Timeout",
               this, timeout.get(),
               int(timeout->mIsTracking),
               !!timeout_was_cleared));

      if (timeout_was_cleared) {
        // Make sure the iterator isn't holding any Timeout objects alive.
        runIter.Clear();

        // Since ClearAllTimeouts() was called the lists should be empty.
        MOZ_DIAGNOSTIC_ASSERT(!HasTimeouts());

        return;
      }

      // If we need to reschedule a setInterval() the delay should be
      // calculated based on when its callback started to execute.  So
      // save off the last time before updating our "now" timestamp to
      // account for its callback execution time.
      TimeStamp lastCallbackTime = now;
      now = TimeStamp::Now();

      // If we have a regular interval timer, we re-schedule the
      // timeout, accounting for clock drift.
      bool needsReinsertion = RescheduleTimeout(timeout, lastCallbackTime, now);

      // Running a timeout can cause another timeout to be deleted, so
      // we need to reset the pointer to the following timeout.
      runIter.UpdateIterator();

      timeout->remove();

      if (needsReinsertion) {
        // Insert interval timeout onto the corresponding list sorted in
        // deadline order. AddRefs timeout.
        if (runIter.PickedTrackingIter()) {
          mTrackingTimeouts.Insert(timeout,
                                   mWindow.IsFrozen() ? Timeouts::SortBy::TimeRemaining
                                                      : Timeouts::SortBy::TimeWhen);
        } else {
          mNormalTimeouts.Insert(timeout,
                                 mWindow.IsFrozen() ? Timeouts::SortBy::TimeRemaining
                                                    : Timeouts::SortBy::TimeWhen);
        }
      }

      // Check to see if we have run out of time to execute timeout handlers.
      // If we've exceeded our time budget then terminate the loop immediately.
      TimeDuration elapsed = now - start;
      if (elapsed >= totalTimeLimit) {
        // We ran out of time.  Make sure to schedule the executor to
        // run immediately for the next timer, if it exists.  Its possible,
        // however, that the last timeout handler suspended the window.  If
        // that happened then we must skip this step.
        if (!mWindow.IsSuspended()) {
          RefPtr<Timeout> timeout = runIter.Next();
          if (timeout) {
            // If we ran out of execution budget we need to force a
            // reschedule. By cancelling the executor we will not run
            // immediately, but instead reschedule to the minimum
            // scheduling delay.
            if (mExecutionBudget < TimeDuration()) {
              mExecutor->Cancel();
            }

            MOZ_ALWAYS_SUCCEEDS(MaybeSchedule(timeout->When(), now));
          }
        }
        break;
      }
    }
  }
}
static PLDHashOperator
CheckForGhostWindowsEnumerator(nsISupports *aKey, TimeStamp& aTimeStamp,
                               void* aClosure)
{
  CheckForGhostWindowsEnumeratorData *data =
    static_cast<CheckForGhostWindowsEnumeratorData*>(aClosure);

  nsWeakPtr weakKey = do_QueryInterface(aKey);
  nsCOMPtr<nsPIDOMWindow> window = do_QueryReferent(weakKey);
  if (!window) {
    // The window object has been destroyed.  Stop tracking its weak ref in our
    // hashtable.
    return PL_DHASH_REMOVE;
  }

  // Avoid calling GetTop() if we have no outer window.  Nothing will break if
  // we do, but it will spew debug output, which can cause our test logs to
  // overflow.
  nsCOMPtr<nsPIDOMWindow> top;
  if (window->GetOuterWindow()) {
    top = window->GetOuterWindow()->GetTop();
  }

  if (top) {
    // The window is no longer detached, so we no longer want to track it.
    return PL_DHASH_REMOVE;
  }

  nsCOMPtr<nsIURI> uri = GetWindowURI(window);

  nsAutoCString domain;
  if (uri) {
    // GetBaseDomain works fine if |uri| is null, but it outputs a warning
    // which ends up overrunning the mochitest logs.
    data->tldService->GetBaseDomain(uri, 0, domain);
  }

  if (data->nonDetachedDomains->Contains(domain)) {
    // This window shares a domain with a non-detached window, so reset its
    // clock.
    aTimeStamp = TimeStamp();
  } else {
    // This window does not share a domain with a non-detached window, so it
    // meets ghost criterion (2).
    if (aTimeStamp.IsNull()) {
      // This may become a ghost window later; start its clock.
      aTimeStamp = data->now;
    } else if ((data->now - aTimeStamp).ToSeconds() > data->ghostTimeout) {
      // This definitely is a ghost window, so add it to ghostWindowIDs, if
      // that is not null.
      if (data->ghostWindowIDs) {
        nsCOMPtr<nsPIDOMWindow> pWindow = do_QueryInterface(window);
        if (pWindow) {
          data->ghostWindowIDs->PutEntry(pWindow->WindowID());
        }
      }
    }
  }

  return PL_DHASH_NEXT;
}
void
LayerManagerComposite::EndTransaction(const TimeStamp& aTimeStamp,
                                      EndTransactionFlags aFlags)
{
  NS_ASSERTION(mInTransaction, "Didn't call BeginTransaction?");
  NS_ASSERTION(!(aFlags & END_NO_COMPOSITE),
               "Shouldn't get END_NO_COMPOSITE here");
  mInTransaction = false;

  if (!mIsCompositorReady) {
    return;
  }
  mIsCompositorReady = false;

#ifdef MOZ_LAYERS_HAVE_LOG
  MOZ_LAYERS_LOG(("  ----- (beginning paint)"));
  Log();
#endif

  if (mDestroyed) {
    NS_WARNING("Call on destroyed layer manager");
    return;
  }

  // Set composition timestamp here because we need it in
  // ComputeEffectiveTransforms (so the correct video frame size is picked) and
  // also to compute invalid regions properly.
  mCompositor->SetCompositionTime(aTimeStamp);

  if (mRoot && mClonedLayerTreeProperties) {
    MOZ_ASSERT(!mTarget);
    nsIntRegion invalid =
      mClonedLayerTreeProperties->ComputeDifferences(mRoot, nullptr, &mGeometryChanged);
    mClonedLayerTreeProperties = nullptr;

    mInvalidRegion.Or(mInvalidRegion, invalid);
  } else if (!mTarget) {
    mInvalidRegion.Or(mInvalidRegion, mRenderBounds);
  }

  if (mInvalidRegion.IsEmpty() && !mTarget) {
    // Composition requested, but nothing has changed. Don't do any work.
    return;
  }

 if (mRoot && !(aFlags & END_NO_IMMEDIATE_REDRAW)) {
    MOZ_ASSERT(!aTimeStamp.IsNull());
    // The results of our drawing always go directly into a pixel buffer,
    // so we don't need to pass any global transform here.
    mRoot->ComputeEffectiveTransforms(gfx::Matrix4x4());

    nsIntRegion opaque;
    ApplyOcclusionCulling(mRoot, opaque);

    Render();
#ifdef MOZ_WIDGET_ANDROID
    RenderToPresentationSurface();
#endif
    mGeometryChanged = false;
  } else {
    // Modified layer tree
    mGeometryChanged = true;
  }

  mCompositor->ClearTargetContext();
  mTarget = nullptr;

#ifdef MOZ_LAYERS_HAVE_LOG
  Log();
  MOZ_LAYERS_LOG(("]----- EndTransaction"));
#endif
}
NS_IMETHODIMP
nsSocketTransportService::Run()
{
    SOCKET_LOG(("STS thread init %d sockets\n", gMaxCount));

    psm::InitializeSSLServerCertVerificationThreads();

    gSocketThread = PR_GetCurrentThread();

    {
        MutexAutoLock lock(mLock);
        mPollableEvent.reset(new PollableEvent());
        //
        // NOTE: per bug 190000, this failure could be caused by Zone-Alarm
        // or similar software.
        //
        // NOTE: per bug 191739, this failure could also be caused by lack
        // of a loopback device on Windows and OS/2 platforms (it creates
        // a loopback socket pair on these platforms to implement a pollable
        // event object).  if we can't create a pollable event, then we'll
        // have to "busy wait" to implement the socket event queue :-(
        //
        if (!mPollableEvent->Valid()) {
            mPollableEvent = nullptr;
            NS_WARNING("running socket transport thread without a pollable event");
            SOCKET_LOG(("running socket transport thread without a pollable event"));
        }

        mPollList[0].fd = mPollableEvent ? mPollableEvent->PollableFD() : nullptr;
        mPollList[0].in_flags = PR_POLL_READ | PR_POLL_EXCEPT;
        mPollList[0].out_flags = 0;
    }

    mRawThread = NS_GetCurrentThread();

    // hook ourselves up to observe event processing for this thread
    nsCOMPtr<nsIThreadInternal> threadInt = do_QueryInterface(mRawThread);
    threadInt->SetObserver(this);

    // make sure the pseudo random number generator is seeded on this thread
    srand(static_cast<unsigned>(PR_Now()));

    // For the calculation of the duration of the last cycle (i.e. the last for-loop
    // iteration before shutdown).
    TimeStamp startOfCycleForLastCycleCalc;
    int numberOfPendingEventsLastCycle;

    // For measuring of the poll iteration duration without time spent blocked
    // in poll().
    TimeStamp pollCycleStart;
    // Time blocked in poll().
    TimeDuration singlePollDuration;

    // For calculating the time needed for a new element to run.
    TimeStamp startOfIteration;
    TimeStamp startOfNextIteration;
    int numberOfPendingEvents;

    // If there is too many pending events queued, we will run some poll()
    // between them and the following variable is cumulative time spent
    // blocking in poll().
    TimeDuration pollDuration;

    for (;;) {
        bool pendingEvents = false;

        numberOfPendingEvents = 0;
        numberOfPendingEventsLastCycle = 0;
        if (mTelemetryEnabledPref) {
            startOfCycleForLastCycleCalc = TimeStamp::NowLoRes();
            startOfNextIteration = TimeStamp::NowLoRes();
        }
        pollDuration = 0;

        do {
            if (mTelemetryEnabledPref) {
                pollCycleStart = TimeStamp::NowLoRes();
            }

            DoPollIteration(&singlePollDuration);

            if (mTelemetryEnabledPref && !pollCycleStart.IsNull()) {
                Telemetry::Accumulate(Telemetry::STS_POLL_BLOCK_TIME,
                                      singlePollDuration.ToMilliseconds());
                Telemetry::AccumulateTimeDelta(
                    Telemetry::STS_POLL_CYCLE,
                    pollCycleStart + singlePollDuration,
                    TimeStamp::NowLoRes());
                pollDuration += singlePollDuration;
            }

            mRawThread->HasPendingEvents(&pendingEvents);
            if (pendingEvents) {
                if (!mServingPendingQueue) {
                    nsresult rv = Dispatch(NewRunnableMethod(this,
                        &nsSocketTransportService::MarkTheLastElementOfPendingQueue),
                        nsIEventTarget::DISPATCH_NORMAL);
                    if (NS_FAILED(rv)) {
                        NS_WARNING("Could not dispatch a new event on the "
                                   "socket thread.");
                    } else {
                        mServingPendingQueue = true;
                    }

                    if (mTelemetryEnabledPref) {
                        startOfIteration = startOfNextIteration;
                        // Everything that comes after this point will
                        // be served in the next iteration. If no even
                        // arrives, startOfNextIteration will be reset at the
                        // beginning of each for-loop.
                        startOfNextIteration = TimeStamp::NowLoRes();
                    }
                }
                TimeStamp eventQueueStart = TimeStamp::NowLoRes();
                do {
                    NS_ProcessNextEvent(mRawThread);
                    numberOfPendingEvents++;
                    pendingEvents = false;
                    mRawThread->HasPendingEvents(&pendingEvents);
                } while (pendingEvents && mServingPendingQueue &&
                         ((TimeStamp::NowLoRes() -
                           eventQueueStart).ToMilliseconds() <
                          mMaxTimePerPollIter));

                if (mTelemetryEnabledPref && !mServingPendingQueue &&
                    !startOfIteration.IsNull()) {
                    Telemetry::AccumulateTimeDelta(
                        Telemetry::STS_POLL_AND_EVENTS_CYCLE,
                        startOfIteration + pollDuration,
                        TimeStamp::NowLoRes());

                    Telemetry::Accumulate(
                        Telemetry::STS_NUMBER_OF_PENDING_EVENTS,
                        numberOfPendingEvents);

                    numberOfPendingEventsLastCycle += numberOfPendingEvents;
                    numberOfPendingEvents = 0;
                    pollDuration = 0;
                }
            }
        } while (pendingEvents);

        bool goingOffline = false;
        // now that our event queue is empty, check to see if we should exit
        {
            MutexAutoLock lock(mLock);
            if (mShuttingDown) {
                if (mTelemetryEnabledPref &&
                    !startOfCycleForLastCycleCalc.IsNull()) {
                    Telemetry::Accumulate(
                        Telemetry::STS_NUMBER_OF_PENDING_EVENTS_IN_THE_LAST_CYCLE,
                        numberOfPendingEventsLastCycle);
                    Telemetry::AccumulateTimeDelta(
                        Telemetry::STS_POLL_AND_EVENT_THE_LAST_CYCLE,
                        startOfCycleForLastCycleCalc,
                        TimeStamp::NowLoRes());
                }
                break;
            }
            if (mGoingOffline) {
                mGoingOffline = false;
                goingOffline = true;
            }
        }
        // Avoid potential deadlock
        if (goingOffline)
            Reset(true);
    }

    SOCKET_LOG(("STS shutting down thread\n"));

    // detach all sockets, including locals
    Reset(false);

    // Final pass over the event queue. This makes sure that events posted by
    // socket detach handlers get processed.
    NS_ProcessPendingEvents(mRawThread);

    gSocketThread = nullptr;

    psm::StopSSLServerCertVerificationThreads();

    SOCKET_LOG(("STS thread exit\n"));
    return NS_OK;
}