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;