求解qt udp接收丢数据问题

想用qt编写一个udp接收文件的程序，结果发现udp接收丢包非常严重，不知道大家有没有遇到过的，求助一下
发送端会没有sleep的发送多个1024字节的数据包过来，接收端使用qt QUDPSocket 编程，接收到的数据长度和发送端发送的数据差别很大，丢包率非常大。
而同样的环境下使用vs编写的udp接收程序就没这个问题，发送端和接收端数据长度完全吻合，下面我贴上我qt编写的udp接收程序

 receiver = new QUdpSocket(this);

    connect(receiver, SIGNAL(readyRead()), this, SLOT(dataReceived()),Qt::AutoConnection);



    port = 12345;

    if (!receiver->bind(port, QUdpSocket::ShareAddress)) {

        QMessageBox::information(this,tr("error"),tr("udp socket create error!"));

        return;

    }

static unsigned long recvCount = 0;

void Receiver::dataReceived()

{

    // 拥有等待的数据报

    while(receiver->hasPendingDatagrams())

    {

        QByteArray datagram;

        datagram.resize(receiver->pendingDatagramSize());

        receiver->readDatagram(datagram.data(), datagram.size());

        recvCount += datagram.size();

        qDebug()<<"====== "<<recvCount;

        //reveiveData->append(datagram);

    }

}

然后我又尝试用qt使用windows api编写udp接收程序，发现同样的代码，vs编写下的win32控制台程序就正常，qt 编写的丢包率就非常严重
贴上我用vs 和 qt 调用windows api 编写的udp接收程序
VS2008:

int _tmain(int argc, _TCHAR* argv[])

{

	int mSock = createSocket(UDP_SOCK);

	struct sockaddr_in fromAddr;

	int fromLen = sizeof(fromAddr);

	char recvBuf[2048]={0};

	unsigned long mCount = 0;

	bindSocket(mSock,12345);

	while(1){

		int recvLen = recvfrom(mSock,recvBuf,sizeof(recvBuf), 0,(struct sockaddr *)&fromAddr, &fromLen);

		if(recvLen <= 0){

			//QThread::usleep(1000);

			continue;

		}

		mCount += recvLen;

		printf(" ==== %d\n",mCount);

	}

	

	return 0;

}

QT :

Widget::Widget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Widget)

{



    ui->setupUi(this);

    createThread();

}



Widget::~Widget()

{

    QThread::msleep(1000);

    delete ui;

}



void udpRecvThread()

{

    int mSock = createSocket(UDP_SOCK);

    struct sockaddr_in fromAddr;

    int fromLen = sizeof(fromAddr);

    char recvBuf[2048]={0};

    unsigned long mCount = 0;

    bindSocket(mSock,12345);

    while(1){

        int recvLen = recvfrom(mSock,recvBuf,sizeof(recvBuf), 0,(struct sockaddr *)&fromAddr, &fromLen);

        if(recvLen <= 0){

            continue;

        }

        mCount += recvLen;

        qDebug()<<"***"<<mCount;

    }

}



void Widget::createThread()

{

    DWORD stateThreadID = 0;

    HANDLE udpThreadHandle= CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)udpRecvThread,NULL,0,&stateThreadID);

    if(udpThreadHandle==NULL){

        printf("create state send speed thread ERR\n");

    }

}

现在非常困惑，因为必须使用qt 来编写udp接收程序，如果丢包问题不解决后面都没法做，所以想问大家有没有解决方法 谢谢！