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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "memorymonitor.h"
#include <QtCharts/QAbstractAxis>
#include <QtCharts/QSplineSeries>
#include <QtCharts/QValueAxis>
#include <QtCore/QRandomGenerator>
#include <QLoggingCategory>
#include <QMainWindow>
#include <QWindow>
#include <QScreen>
#include <QDir>
#include <QTime>
extern "C" {
#include <unistd.h>
#include <sys/resource.h>
}
#include <cstdio>
namespace {
const QString KChartFileName = "MemoryUsageChart";
const quint8 KYPosition = 15;
const quint8 KReadingMargin = 80;
const quint16 KToKilo = 1024;
}
Q_LOGGING_CATEGORY(lcMemoryMonitor, "qt.virtualkeyboard.tests.manual.x11vkbtest.memorymonitor")
MemoryMonitor::MemoryMonitor(QMainWindow &window, QGraphicsItem *parent, Qt::WindowFlags wFlags) :
QChart(QChart::ChartTypeCartesian, parent, wFlags),
m_series(nullptr),
m_axisX(new QValueAxis()),
m_axisY(new QValueAxis()),
m_x(0),
m_y(0),
m_peakMemory(0),
m_minMemory(0),
m_procID(0),
m_MainWindow(window),
m_screen(nullptr),
m_drawInterval(new QTimer()),
m_elapsedTime(0),
m_minMemReading(nullptr),
m_curMemReading(nullptr),
m_peakMemReading(nullptr),
m_elapsedTimeReading(nullptr)
{
m_series = new QSplineSeries(this);
QPen red(Qt::red);
red.setWidth(3);
m_series->setPen(red);
this->addSeries(m_series);
this->addAxis(m_axisX,Qt::AlignBottom);
m_axisX->setTitleText("Time");
this->addAxis(m_axisY,Qt::AlignLeft);
m_axisY->setTitleText("Memory KB");
m_series->attachAxis(m_axisX);
m_series->attachAxis(m_axisY);
m_axisX->setTickCount(15);
m_axisX->setLabelFormat("%.1u");
m_axisY->setTickCount(15);
m_axisY->setLabelFormat("%.1u");
m_axisX->setRange(0, 500);
m_axisY->setRange(0, 100 * KToKilo);
}
void MemoryMonitor::init()
{
QWindow *win = m_MainWindow.windowHandle();
m_screen = win->screen();
m_minMemReading = new QGraphicsSimpleTextItem(this);
m_minMemReading->setPen(QPen(QBrush("black"), 1));
m_minMemReading->setText("Min mem ----- KB");
m_minMemReading->setPos(KReadingMargin, KYPosition);
m_curMemReading = new QGraphicsSimpleTextItem(this);
m_curMemReading->setPen(QPen(QBrush("black"), 1));
m_curMemReading->setText("Current mem ----- KB");
m_curMemReading->setPos((this->size().width() / 2) - KReadingMargin, KYPosition);
m_peakMemReading = new QGraphicsSimpleTextItem(this);
m_peakMemReading->setPen(QPen(QBrush("black"), 1));
m_peakMemReading->setText("Peak mem ----- KB");
m_peakMemReading->setPos(this->size().width() - (KReadingMargin * 2), KYPosition);
m_elapsedTimeReading = new QGraphicsSimpleTextItem(this);
m_elapsedTimeReading->setPen(QPen(QBrush("black"), 1));
m_elapsedTimeReading->setText("-- s");
m_elapsedTimeReading->setPos((this->size().width() / 2) + KReadingMargin, this->size().height() - KYPosition * 3);
QObject::connect(this, &QChart::geometryChanged, [this]() {
m_minMemReading->setPos(KReadingMargin, KYPosition);
m_curMemReading->setPos((this->size().width() / 2) - KReadingMargin, KYPosition);
m_peakMemReading->setPos(this->size().width() - (KReadingMargin * 2), KYPosition);
m_elapsedTimeReading->setPos((this->size().width() / 2) + KReadingMargin, this->size().height() - KYPosition * 3);
});
}
void MemoryMonitor::setProcID(const qint64 procID)
{
m_procID = procID;
}
void MemoryMonitor::start()
{
QObject::connect(m_drawInterval, &QTimer::timeout, [&]() {
ulong memUsed = currentMemUsage();
this->drawMemUsage(memUsed);
this->storeMemValues(memUsed);
});
m_drawInterval->setInterval(1000);
m_drawInterval->start();
}
/**
* @brief currentMemUsage
* @param procID
* @return current memory by procID in kB
* Getting memory usage of a given process using
* Linux proc filesystem.
*/
ulong MemoryMonitor::currentMemUsage()
{
ulong memSize = 0UL;
QString str = QString("/proc/" + QString::number(m_procID) + "/statm");
QFile procFile(str);
if (procFile.open(QIODevice::ReadOnly)) {
QTextStream procStream(&procFile);
ulong mem = procStream.readLine().split(" ").at(1).toULong();
memSize = mem * static_cast<ulong>(sysconf(_SC_PAGESIZE));
procFile.close();
}
auto result = memSize / KToKilo;
qCDebug(lcMemoryMonitor).noquote() << QTime::currentTime().toString() << "memory usage:" << result;
emit memUsage(m_elapsedTime, result);
return result;
}
MemoryMonitor::~MemoryMonitor()
{
qCDebug(lcMemoryMonitor) << "Destroying MemoryChart";
}
void MemoryMonitor::saveChart()
{
QPixmap pix = m_screen->grabWindow(m_MainWindow.winId());
const QString format = "png";
QString path = QDir::currentPath();
path += "/" + KChartFileName + "." + format;
pix.save(path);
}
void MemoryMonitor::stopChart()
{
this->saveChart();
m_drawInterval->stop();
emit minAndPeakReport(QString("Min process memory: %1 KB\nPeak process memory: %2 KB")
.arg(QString::number(m_minMemory))
.arg(QString::number(m_peakMemory)));
}
void MemoryMonitor::storeMemValues(const ulong memValue)
{
if ((m_minMemory == 0 || m_minMemory > memValue)) {
m_minMemory = memValue;
}
if (m_peakMemory < memValue) {
m_peakMemory = memValue;
}
m_minMemReading->setText(QString("Min mem %1 KB").arg(QString::number(m_minMemory)));
m_curMemReading->setText(QString("Current mem %1 KB").arg(QString::number(memValue)));
m_peakMemReading->setText(QString("Peak mem %1 KB").arg(QString::number(m_peakMemory)));
m_elapsedTimeReading->setText(QString("%1 s").arg(m_elapsedTime += 1));
}
void MemoryMonitor::drawMemUsage(const ulong memUsed)
{
m_x += 1;
m_y = memUsed;
if (m_y >= m_axisY->max()) {
m_axisY->setRange(0, (m_axisY->max() * 2));
}
if (m_x >= m_axisX->max()) {
m_axisX->setRange(0, (m_axisX->max() * 2));
}
m_series->append(m_x, m_y);
}
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