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PerfProfiler: Support context switch events

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Change-Id: I328b518cc3674ee26975edf26d40057ceb2c21a2
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>
This commit is contained in:
Ulf Hermann
2019-05-02 16:40:56 +02:00
parent 3830619cc8
commit e5ee202f85
5 changed files with 32 additions and 2 deletions
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17
src/plugins/perfprofiler/perfevent.h
View File

@@ -50,7 +50,8 @@ public:
ThreadStartTypeId = -2,
ThreadEndTypeId = -3,
LostTypeId = -4,
LastSpecialTypeId = -5
ContextSwitchTypeId = -5,
LastSpecialTypeId = -256
};
const QVector<qint32> &origFrames() const { return m_origFrames; }
@@ -72,6 +73,9 @@ public:
quint8 feature() const { return m_feature; }
quint8 extra() const { return m_extra; }
void setExtra(quint8 extra) { m_extra = extra; }
private:
friend QDataStream &operator>>(QDataStream &stream, PerfEvent &event);
friend QDataStream &operator<<(QDataStream &stream, const PerfEvent &event);
@@ -86,6 +90,7 @@ private:
quint8 m_origNumGuessedFrames = 0;
quint8 m_numGuessedFrames = 0;
quint8 m_feature = PerfEventType::InvalidFeature;
quint8 m_extra = 0;
};
inline QDataStream &operator>>(QDataStream &stream, PerfEvent &event)
@@ -109,6 +114,7 @@ inline QDataStream &operator>>(QDataStream &stream, PerfEvent &event)
case PerfEventType::Sample43:
case PerfEventType::Sample:
case PerfEventType::TracePointSample:
case PerfEventType::ContextSwitchDefinition:
break;
case PerfEventType::InvalidFeature:
QTC_ASSERT(false, return stream);
@@ -130,6 +136,12 @@ inline QDataStream &operator>>(QDataStream &stream, PerfEvent &event)
case PerfEventType::LostDefinition:
event.setTypeIndex(PerfEvent::LostTypeId);
break;
case PerfEventType::ContextSwitchDefinition:
event.setTypeIndex(PerfEvent::ContextSwitchTypeId);
bool isSwitchOut;
stream >> isSwitchOut;
event.setExtra(isSwitchOut);
break;
default: {
qint32 typeIndex;
stream >> event.m_origFrames >> event.m_origNumGuessedFrames >> typeIndex;
@@ -155,6 +167,9 @@ inline QDataStream &operator<<(QDataStream &stream, const PerfEvent &event)
case PerfEventType::ThreadEnd:
case PerfEventType::LostDefinition:
break;
case PerfEventType::ContextSwitchDefinition:
stream << bool(event.extra());
break;
case PerfEventType::Sample43:
case PerfEventType::Sample:
case PerfEventType::TracePointSample:

5
src/plugins/perfprofiler/perfeventtype.h
View File

@@ -55,6 +55,7 @@ public:
TracePointFormat,
TracePointSample,
AttributesDefinition,
ContextSwitchDefinition,
InvalidFeature
};
@@ -66,7 +67,8 @@ public:
static quint64 metaFeatures()
{
return (1ull << ThreadStart) | (1ull << ThreadEnd) | (1ull << LostDefinition);
return (1ull << ThreadStart) | (1ull << ThreadEnd) | (1ull << LostDefinition)
| (1ull << ContextSwitchDefinition);
}
static quint64 locationFeatures()
@@ -143,6 +145,7 @@ public:
case ThreadStart:
case ThreadEnd:
case LostDefinition:
case ContextSwitchDefinition:
return true;
default:
return false;

1
src/plugins/perfprofiler/perfprofilertracefile.cpp
View File

@@ -237,6 +237,7 @@ void PerfProfilerTraceFile::readMessages(const QByteArray &buffer)
case PerfEventType::ThreadStart:
case PerfEventType::ThreadEnd:
case PerfEventType::LostDefinition:
case PerfEventType::ContextSwitchDefinition:
if (acceptsSamples())
traceManager->appendEvent(std::move(event));
break;

2
src/plugins/perfprofiler/perfprofilertracemanager.cpp
View File

@@ -217,6 +217,8 @@ void PerfProfilerTraceManager::resetAttributes()
tr("Thread ended")));
setEventType(PerfEvent::LostTypeId, PerfEventType(PerfEventType::LostDefinition,
tr("Samples lost")));
setEventType(PerfEvent::ContextSwitchTypeId,
PerfEventType(PerfEventType::ContextSwitchDefinition, tr("Context switch")));
}
void PerfProfilerTraceManager::finalize()

9
src/plugins/perfprofiler/perftimelinemodel.cpp
View File

@@ -198,6 +198,10 @@ QVariantMap PerfTimelineModel::details(int index) const
result.insert(tr("Details"), tr("lost sample"));
result.insert(tr("Timestamp"), Timeline::formatTime(startTime(index),
manager->traceDuration()));
} else if (typeId == PerfEvent::ContextSwitchTypeId) {
result.insert(tr("Details"), tr("context switch"));
result.insert(tr("Timestamp"), Timeline::formatTime(startTime(index),
manager->traceDuration()));
} else {
const PerfProfilerTraceManager::Symbol &symbol
= manager->symbol(manager->aggregateAddresses()
@@ -438,6 +442,11 @@ void PerfTimelineModel::loadEvent(const PerfEvent &event, int numConcurrentThrea
addSample(guessed, 0, 0);
break;
}
case PerfEvent::ContextSwitchTypeId: {
const int id = TimelineModel::insert(event.timestamp(), 1, PerfEvent::ContextSwitchTypeId);
m_data.insert(id, StackFrame::sampleFrame());
break;
}
case PerfEvent::ThreadStartTypeId: {
if (m_threadStartTimestamp < 0 || event.timestamp() <= m_threadStartTimestamp)
m_threadStartTimestamp = event.timestamp() - 1;