Hyper-V机器上的套接字异常

Question

Recently, our entire QA environment moved from VMWare to Hyper-V virtual machines.

One of our applications sends UDP packets to a multicast cloud by a rate of 20K packets per second.

While that worked perfectly on the VMWare environment, the Hyper-V makes the application to throw the following exception after a couple minutes of work:

System.Net.Sockets.SocketException (0x80004005): An invalid argument was supplied
   at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)

I've also managed to mimic this issue instantly when defining the socket's sending buffer size to 1,000,000 bytes.

How can I resolve this issue?

UPDATE 1 : This is a log entry from the event viewer once the exception happens:

Faulting application name: Agent.exe, version: 1.0.12.7366, time stamp: 0x51389f69
Faulting module name: KERNELBASE.dll, version: 6.1.7601.18015, time stamp: 0x50b83c8a
Exception code: 0xe0434352
Fault offset: 0x0000c41f
Faulting process id: 0xaf0
Faulting application start time: 0x01ce1b4ce509dc7a
Faulting application path: C:\Users\DevUser\Desktop\QA\Agent.exe
Faulting module path: C:\Windows\syswow64\KERNELBASE.dll
Report Id: d2b45dce-8740-11e2-86f9-00155d022804

UPDATE 2 : The size of the UDP packet is 100-200 bytes.

UPDATE 3 : Here is the problematic code:

    m_socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
    m_socket.Ttl = 1;

    if (GetRawParameter("send") != null)
    {
      Log("Starting sender...");

      StartSender();
    }

    ...snip...

private static void StartSender()
{
  m_lastPacketNumber = 0;

  m_socket.Connect(new IPEndPoint(m_ipAddress, m_port));

  if (m_bufferSize > 0)
    m_socket.SetSocketOption(
      SocketOptionLevel.Socket, SocketOptionName.SendBuffer, m_bufferSize);

  byte[] dataPad = null;

  if (m_packetSize > 8)
  {
    dataPad = new byte[m_packetSize - sizeof(long)];

    for (int i = 0; i < dataPad.Length; i++)
    {
      dataPad[i] = 0xFF;
    }
  }

  while (true)
  {
    Log("Sending data...");

    for (int i = 0; i < m_packetsPerSec; i++)
    {
      var data = BitConverter.GetBytes(m_lastPacketNumber.Value);

      if (dataPad != null)
        data = data.Concat(dataPad).ToArray();

      if (m_packetDump != null)
        m_packetDump.Add(m_lastPacketNumber.Value);

      m_socket.Send(data);

      if (m_usePerformanceCounters)
        IncreaseSendCounters(1);

      m_lastPacketNumber++;
    }

    Log(m_lastPacketNumber + " packets sent.");

    Thread.Sleep(1000);
  }
}

UPDATE 4 : the failed Send() seems to happen on the #14156 or #32485 or #25412 packet (not the first one!) when I try to send 100K of packets per second.

Answer 1

Could you "roll up" the packets so that you are sending far less packets of larger size...and then un-roll them on the other side? 20k packets/second is a lot of sendto's.