Ubtun的内存CPU上传下载速率读取-qt

QStringList speed::getFileInfo(QString fileName)

{

//QString fileName="/proc/meminfo";

QFile file(fileName);

if (!file.open(QFile::ReadOnly | QFile::Text))

{

qDebug()<<"Cound't opend file!";

//return NULL;

}

QTextStream stream(&file);

QApplication::setOverrideCursor(Qt::WaitCursor);

QString fileText;

QStringList list1;

do {

fileText =stream.readLine();

list1+=fileText;

} while (!fileText.isNull());

QApplication::restoreOverrideCursor();

file.close();

return list1;

}

double dowNum=0;

double tranNUm=0;

double lasdowNum=0;

double lastranNUm=0;

QStringList speed::getNWS()

{

dowNum=0;

tranNUm=0;

QString filename ="/proc/net/dev";

QStringList strList = getFileInfo(filename);

for(int i=0;i<strList.length();i++)

{

if(strList.at(i).trimmed().mid(0,3)=="eth"||strList.at(i).trimmed().mid(0,3)=="wla")

{

dowNum+=strList.at(i).split(" ",QString::SkipEmptyParts).at(1).toDouble();

tranNUm+=strList.at(i).split(" ",QString::SkipEmptyParts).at(9).toDouble();

}

}

int dowSpeed=(dowNum-lasdowNum)/1024;    //KB

int tranSpeed=(tranNUm-lastranNUm)/1024; //KB

lasdowNum=dowNum;

lastranNUm=tranNUm;

QString dowStr;

QString tranStr;

dowStr.setNum(dowSpeed);

tranStr.setNum(tranSpeed);

QStringList speedList;

speedList+=dowStr;

speedList+=tranStr;

return speedList;

}

QStringList speed::getMem()

{

QString filename="/proc/meminfo";

QStringList strList = getFileInfo(filename);

double totalNum=strList.at(0).split(" ",QString::SkipEmptyParts).at(1).toDouble();

double freeNum = strList.at(1).split(" ",QString::SkipEmptyParts).at(1).toDouble();

double bufferNum = strList.at(2).split(" ",QString::SkipEmptyParts).at(1).toDouble();

double cacheNum = strList.at(3).split(" ",QString::SkipEmptyParts).at(1).toDouble();

QString totalStr;   //total memory

QString freeStr;    //free memory

QString useStr;     //percentage

totalStr.setNum(totalNum/1024);

freeStr.setNum((freeNum+bufferNum+cacheNum)/1024);

useStr.setNum(100*(totalNum-freeNum-bufferNum-cacheNum)/totalNum);//**%

QStringList allList;

allList+=totalStr;

allList+=freeStr;

allList+=useStr;

return allList;

}

double totalCPUTime=0;

double lastTotalCPUTime=0;

double idleTime=0;

double lastIdleTime=0;

QString speed::getCPU()

{

QString filename="/proc/stat";

QStringList strList = getFileInfo(filename);

for(int i=1;i<10;i++)

{

totalCPUTime+=strList.at(0).split(" ",QString::SkipEmptyParts).at(i).toDouble();

}

idleTime=strList.at(0).split(" ",QString::SkipEmptyParts).at(4).toDouble();

QString usageStr;

double allCPUTime=totalCPUTime-lastTotalCPUTime;

double unuseCOUTime=idleTime-lastIdleTime;

usageStr.setNum(100*(allCPUTime-unuseCOUTime)/allCPUTime);

lastTotalCPUTime=totalCPUTime;

lastIdleTime=idleTime;

totalCPUTime=0;

return usageStr;

}