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Bug 1350930 - Move profiler markers for reflow and style flushes from the refresh driver into the PresShell. r=bz

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MozReview-Commit-ID: FQs2zsIU2zO

--HG--
extra : rebase_source : 166617f5966cbad18401bc590a266ce00d858bab
This commit is contained in:
Markus Stange 2017-11-15 16:10:32 -05:00
parent 39b9263245
commit ae94ae81a4
5 changed files with 32 additions and 44 deletions
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11
layout/base/PresShell.cpp
View File

@ -4210,6 +4210,12 @@ PresShell::DoFlushPendingNotifications(mozilla::ChangesToFlush aFlush)
// type.
if (!mIsDestroying) {
nsAutoScriptBlocker scriptBlocker;
#ifdef MOZ_GECKO_PROFILER
AutoProfilerTracing tracingStyleFlush("Paint", "Styles",
Move(mStyleCause));
mStyleCause = nullptr;
#endif
mPresContext->RestyleManager()->ProcessPendingRestyles();
}
@ -4224,6 +4230,11 @@ PresShell::DoFlushPendingNotifications(mozilla::ChangesToFlush aFlush)
? FlushType::Layout
: FlushType::InterruptibleLayout) &&
!mIsDestroying) {
#ifdef MOZ_GECKO_PROFILER
AutoProfilerTracing tracingLayoutFlush("Paint", "Reflow",
Move(mReflowCause));
mReflowCause = nullptr;
#endif
didLayoutFlush = true;
mFrameConstructor->RecalcQuotesAndCounters();
viewManager->FlushDelayedResize(true);

9
layout/base/nsIPresShell.h
View File

@ -17,6 +17,7 @@
#include "mozilla/StyleSetHandle.h"
#include "mozilla/StyleSheet.h"
#include "mozilla/WeakPtr.h"
#include "GeckoProfiler.h"
#include "gfxPoint.h"
#include "nsTHashtable.h"
#include "nsHashKeys.h"
@ -1697,6 +1698,14 @@ protected:
// A hash table of heap allocated weak frames.
nsTHashtable<nsPtrHashKey<WeakFrame>> mWeakFrames;
#ifdef MOZ_GECKO_PROFILER
// These two fields capture call stacks of any changes that require a restyle
// or a reflow. Only the first change per restyle / reflow is recorded (the
// one that caused a call to SetNeedStyleFlush() / SetNeedLayoutFlush()).
UniqueProfilerBacktrace mStyleCause;
UniqueProfilerBacktrace mReflowCause;
#endif
// Most recent canvas background color.
nscolor mCanvasBackgroundColor;

12
layout/base/nsIPresShellInlines.h
View File

@ -18,6 +18,12 @@ nsIPresShell::SetNeedLayoutFlush()
shell->mNeedLayoutFlush = true;
}
}
#ifdef MOZ_GECKO_PROFILER
if (!mReflowCause) {
mReflowCause = profiler_get_backtrace();
}
#endif
}
void
@ -29,6 +35,12 @@ nsIPresShell::SetNeedStyleFlush()
shell->mNeedStyleFlush = true;
}
}
#ifdef MOZ_GECKO_PROFILER
if (!mStyleCause) {
mStyleCause = profiler_get_backtrace();
}
#endif
}
void

20
layout/base/nsRefreshDriver.cpp
View File

@ -1857,9 +1857,6 @@ nsRefreshDriver::Tick(int64_t aNowEpoch, TimeStamp aNowTime)
DispatchScrollEvents();
if (mPresContext && mPresContext->GetPresShell()) {
#ifdef MOZ_GECKO_PROFILER
Maybe<AutoProfilerTracing> tracingStyleFlush;
#endif
AutoTArray<nsIPresShell*, 16> observers;
observers.AppendElements(mStyleFlushObservers);
for (uint32_t j = observers.Length();
@ -1870,13 +1867,6 @@ nsRefreshDriver::Tick(int64_t aNowEpoch, TimeStamp aNowTime)
if (!mStyleFlushObservers.RemoveElement(shell))
continue;
#ifdef MOZ_GECKO_PROFILER
if (!tracingStyleFlush) {
tracingStyleFlush.emplace("Paint", "Styles", Move(mStyleCause));
mStyleCause = nullptr;
}
#endif
nsCOMPtr<nsIPresShell> shellKungFuDeathGrip(shell);
shell->mObservingStyleFlushes = false;
shell->FlushPendingNotifications(ChangesToFlush(FlushType::Style, false));
@ -1892,9 +1882,6 @@ nsRefreshDriver::Tick(int64_t aNowEpoch, TimeStamp aNowTime)
}
} else if (i == 2) {
// This is the FlushType::Layout case.
#ifdef MOZ_GECKO_PROFILER
Maybe<AutoProfilerTracing> tracingLayoutFlush;
#endif
AutoTArray<nsIPresShell*, 16> observers;
observers.AppendElements(mLayoutFlushObservers);
for (uint32_t j = observers.Length();
@ -1905,13 +1892,6 @@ nsRefreshDriver::Tick(int64_t aNowEpoch, TimeStamp aNowTime)
if (!mLayoutFlushObservers.RemoveElement(shell))
continue;
#ifdef MOZ_GECKO_PROFILER
if (!tracingLayoutFlush) {
tracingLayoutFlush.emplace("Paint", "Reflow", Move(mReflowCause));
mReflowCause = nullptr;
}
#endif
nsCOMPtr<nsIPresShell> shellKungFuDeathGrip(shell);
shell->mObservingLayoutFlushes = false;
shell->mWasLastReflowInterrupted = false;

24
layout/base/nsRefreshDriver.h
View File

@ -24,7 +24,6 @@
#include "nsHashKeys.h"
#include "mozilla/Attributes.h"
#include "mozilla/Maybe.h"
#include "GeckoProfiler.h"
#include "mozilla/layers/TransactionIdAllocator.h"
class nsPresContext;
@ -160,15 +159,6 @@ public:
bool AddStyleFlushObserver(nsIPresShell* aShell) {
NS_ASSERTION(!mStyleFlushObservers.Contains(aShell),
"Double-adding style flush observer");
// We only get the cause for the first observer each frame because capturing
// a stack is expensive. This is still useful if (1) you're trying to remove
// all flushes for a particial frame or (2) the costly flush is triggered
// near the call site where the first observer is triggered.
#ifdef MOZ_GECKO_PROFILER
if (!mStyleCause) {
mStyleCause = profiler_get_backtrace();
}
#endif
bool appended = mStyleFlushObservers.AppendElement(aShell) != nullptr;
EnsureTimerStarted();
@ -180,15 +170,6 @@ public:
bool AddLayoutFlushObserver(nsIPresShell* aShell) {
NS_ASSERTION(!IsLayoutFlushObserver(aShell),
"Double-adding layout flush observer");
#ifdef MOZ_GECKO_PROFILER
// We only get the cause for the first observer each frame because capturing
// a stack is expensive. This is still useful if (1) you're trying to remove
// all flushes for a particial frame or (2) the costly flush is triggered
// near the call site where the first observer is triggered.
if (!mReflowCause) {
mReflowCause = profiler_get_backtrace();
}
#endif
bool appended = mLayoutFlushObservers.AppendElement(aShell) != nullptr;
EnsureTimerStarted();
return appended;
@ -420,11 +401,6 @@ private:
mozilla::RefreshDriverTimer* ChooseTimer() const;
mozilla::RefreshDriverTimer* mActiveTimer;
#ifdef MOZ_GECKO_PROFILER
UniqueProfilerBacktrace mReflowCause;
UniqueProfilerBacktrace mStyleCause;
#endif
// nsPresContext passed in constructor and unset in Disconnect.
mozilla::WeakPtr<nsPresContext> mPresContext;