RE: byte stats anomaly - 50MB reports for 18MB FTP transfer

From: Chas Wareing (c3w@isp.net)
Date: Mon Oct 23 2000 - 10:58:11 PDT

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    Thanks Steve-
    That worked beautifully- I also needed to mod
    the new apps/flowwatch.cc with your
            g_packetQueue.GetLock(true);
            and
            g_packetQueue.ReleaseLock(true);

    you should release a patch-

    Chas. <c3w@ISP.NET>
    ISP Networks, Inc.

    -----Original Message-----
    From: Steve Nunes [mailto:steve.nunes@coreexpress.net]
    Sent: Monday, October 23, 2000 7:55 AM
    To: cflowd@caida.org
    Subject: RE: byte stats anomaly - 50MB reports for 18MB FTP transfer

    Chas,

    There is a race condition in the shared memory semaphore operation between
    cflowdmux
    and cflowd. I modified the attached files (in 2-1-a3) to get around it.

    Also, in cflowd.cc, I changed the packetQueue calls to pass true as follows:

    g_packetQueue.GetLock(true);

    and

    g_packetQueue.ReleaseLock(true);

    Hope that helps

    Steve 

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