9 second ping lag unless I run tcpdump on RELENG_5

From: William D. Colburn (aka Schlake) (wcolburn_at_nmt.edu)
Date: 10/21/04

  • Next message: Richard Wendland: "Re: Removing T/TCP and replacing it with something simpler" 
    Date: Thu, 21 Oct 2004 08:56:54 -0600
To: freebsd-net@freebsd.org

    I have a RELENG_5 box on my desk. Unless I run the tcpdump program, it
    responds progressively slower on the network. This seemed like the most
    appropriate list to post this question too.

    This morning, for instance, it had a 9 second ping response time from a
    machine on the same network segment as it when I came into work. As
    soon as I typed 'tcpdump' on the freebsd box the ping time dropped to
    nearly instantaneous. I killed tcpdump and let it run for a while.
    About a thousand seconds later it suddenly jumped to 1 second, then to 2
    seconds. As soon as I ran tcpdump again it dropped back to normal.

    The uname ids it as 5.3-STABLE #14: Wed Oct 20 10:23:11 UTC 2004,
    with a GENERIC kernel. I did a new cvsup (along with a tcpdump because
    otherwise cvsup fails) this morning and nothing new came across. 

    --
William Colburn, "Sysprog" <wcolburn@nmt.edu>
Computer Center, New Mexico Institute of Mining and Technology
http://www.nmt.edu/tcc/     http://www.nmt.edu/~wcolburn
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  • Next message: Richard Wendland: "Re: Removing T/TCP and replacing it with something simpler"

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