dc TX underrun leads to delayed crash

From: Peter C. Lai (sirmoo_at_cowbert.2y.net)
Date: 07/30/03

  • Next message: Mike Silbersack: "Re: dc TX underrun leads to delayed crash"
    Date: Wed, 30 Jul 2003 17:58:23 -0400
    To: freebsd-net@freebsd.org
    
    

    I'm noticing on a moderately loaded system, that sometimes when the kernel
    increases the TX threshold (/kernel: dc0: TX underrun -- increasing TX
    threshold), a few minutes later, the system hardlocks requiring a reset.
    This routinely happens when I'm streaming MP3s over the network and the box
    suddenly hardlocks; after I go back to inspect the logs, the TX buffer underrun
    is the only thing in the log before the start of the kernel reboot messages.
    This is occuring on 4.8-STABLE as of July 7, 2003 on an AMD K6-2 500 with
    348 Mb RAM and VIA Apollo MVP3 chipset. When the lockups occur, the system
    temperatures are below 40C, with little disk activity, moderate ram and cpu
    usage; the NIC (linksys LNE-100TX A) is usually doing a steady 50K/s at this point.

    -- 
    Peter C. Lai
    University of Connecticut
    Dept. of Molecular and Cell Biology
    Yale University School of Medicine
    SenseLab | Research Assistant
    http://cowbert.2y.net/
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  • Next message: Mike Silbersack: "Re: dc TX underrun leads to delayed crash"

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