From d4f10f9fe446da2aff65088e5236d6ffcdd034b5 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Fri, 24 Feb 2017 12:33:55 +0100
Subject: initial commit

---
 src/copythread.cpp | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/copythread.cpp

(limited to 'src/copythread.cpp')

diff --git a/src/copythread.cpp b/src/copythread.cpp
new file mode 100644
index 0000000..1f9ec2f
--- /dev/null
+++ b/src/copythread.cpp
@@ -0,0 +1,72 @@
+#include "copythread.h"
+#include <QFile>
+#include <QElapsedTimer>
+#include <QCoreApplication>
+#include <QDebug>
+
+// 1M read size
+#define BUFFER_SIZE (1000000)
+// 20 seconds for each test
+#define TEST_LENGTH (60000)
+
+CopyThread::CopyThread(QFile *file, QObject *parent)
+	: QThread(parent),
+	  _doStop(false)
+{
+	_file = file;
+}
+
+CopyThread::~CopyThread()
+{
+	delete _file;
+}
+
+void CopyThread::stop()
+{
+	_doStop = true;
+}
+
+void CopyThread::run()
+{
+	qDebug() << "Entering run method";
+	char *buffer = new char[BUFFER_SIZE];
+	QElapsedTimer timer;
+	qint64 ret;
+	qint64 seqSum = 0, rndSum = 0;
+	qint64 seqTime, rndTime = -1;
+
+	// Sequential read
+	emit logMessage(trUtf8("Starting sequential read test"));
+	timer.start();
+	do {
+		ret = _file->read(buffer, BUFFER_SIZE);
+		seqSum += ret;
+		if (ret == 0) {
+			_file->seek(0);
+		}
+	} while (!_doStop && ret >= 0 && timer.elapsed() < TEST_LENGTH);
+	seqTime = timer.elapsed();
+
+	// Random read
+	qsrand((uint)QCoreApplication::applicationPid());
+	const qint64 size = _file->size() - BUFFER_SIZE;
+	if (size > 0) {
+		emit logMessage(trUtf8("Starting random read test"));
+		timer.restart();
+		do {
+			_file->seek(((qint64)qrand() ^ ((qint64)qrand() << 15)) % size);
+			ret = _file->read(buffer, BUFFER_SIZE);
+			rndSum += ret;
+		} while (!_doStop && ret > 0 && timer.elapsed() < TEST_LENGTH);
+		rndTime = timer.elapsed();
+	}
+
+	// All done
+	const qint64 seqSpeed = seqSum / (seqTime * 1024 + 1);
+	const qint64 rndSpeed = rndSum / (rndTime * 1024 + 1);
+	emit logMessage(trUtf8("Seq: %1MiB/s, Random: %2MiB/s - [%3s / %4s]")
+			.arg(QString::number(seqSpeed), QString::number(rndSpeed),
+					QString::number(seqTime / 1000), QString::number(rndTime / 1000)));
+	delete[] buffer;
+	_file->close();
+}
-- 
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