• Ulf Hermann's avatar
    Select specific features to be recorded when profiling QML · 1de6e7b8
    Ulf Hermann authored
    
    Some features, like the memory profiler, create huge amounts of data.
    Often enough, we're not actually interested in all the data available
    from the profiler and collecting it all can lead to excessive memory
    consumption. This change enables us to optionally turn various aspects
    of QML profiling off.
    
    Task-number: QTBUG-41118
    Change-Id: I7bb223414e24eb903124ffa6e0896af6ce974e49
    Reviewed-by: default avatarGunnar Sletta <gunnar@sletta.org>
    1de6e7b8
qv4profiling.cpp 4.06 KiB
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#include "qv4profiling_p.h"
#include "qv4mm_p.h"
QT_BEGIN_NAMESPACE
using namespace QV4;
using namespace QV4::Profiling;
FunctionCallProperties FunctionCall::resolve() const
    FunctionCallProperties props = {
        m_start,
        m_end,
        m_function->name()->toQString(),
        m_function->compilationUnit->fileName(),
        m_function->compiledFunction->location.line,
        m_function->compiledFunction->location.column
    return props;
Profiler::Profiler(QV4::ExecutionEngine *engine) : featuresEnabled(0), m_engine(engine)
    static int metatype = qRegisterMetaType<QList<QV4::Profiling::FunctionCallProperties> >();
    static int metatype2 = qRegisterMetaType<QList<QV4::Profiling::MemoryAllocationProperties> >();
    Q_UNUSED(metatype);
    Q_UNUSED(metatype2);
    m_timer.start();
struct FunctionCallComparator {
    bool operator()(const FunctionCallProperties &p1, const FunctionCallProperties &p2)
    { return p1.start < p2.start; }
void Profiler::stopProfiling()
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{ featuresEnabled = 0; reportData(); } void Profiler::reportData() { QList<FunctionCallProperties> resolved; resolved.reserve(m_data.size()); FunctionCallComparator comp; foreach (const FunctionCall &call, m_data) { FunctionCallProperties props = call.resolve(); resolved.insert(std::upper_bound(resolved.begin(), resolved.end(), props, comp), props); } emit dataReady(resolved, m_memory_data); } void Profiler::startProfiling(quint64 features) { if (featuresEnabled == 0) { m_data.clear(); m_memory_data.clear(); if (features & (1 << FeatureMemoryAllocation)) { qint64 timestamp = m_timer.nsecsElapsed(); MemoryAllocationProperties heap = {timestamp, (qint64)m_engine->memoryManager->getAllocatedMem(), HeapPage}; m_memory_data.append(heap); MemoryAllocationProperties small = {timestamp, (qint64)m_engine->memoryManager->getUsedMem(), SmallItem}; m_memory_data.append(small); MemoryAllocationProperties large = {timestamp, (qint64)m_engine->memoryManager->getLargeItemsMem(), LargeItem}; m_memory_data.append(large); } featuresEnabled = features; } } QT_END_NAMESPACE