RE: FreeBSD polling mode - count 'lost' packets?

From: Karl Pielorz (kpielorz_at_tdx.co.uk)
Date: 03/11/04

  • Next message: Randy Jordan: "post not making it to list" 
    Date: Thu, 11 Mar 2004 13:43:30 +0000
To: Don Bowman <don@sandvine.com>, freebsd-isp@freebsd.org

    --On 08 March 2004 10:17 -0500 Don Bowman <don@sandvine.com> wrote:

    > netstat -i will tell you these things, look for ifInErrors, ifOutErrors.
    > sysctl kern.polling will indicate if you can't poll fast enough.

    Hmmm, should kern.polling.suspect & kern.polling.lost_polls keep
    incrementing?

    Mine increment steadily. If you set kern.polling.enable=1 - they stay at
    zero - send a burst of traffic, and they keep incrementing steadily after
    that (about 20 or so a second).

    Even if there's no traffic at all...

    I don't seem to encounter any packet loss because of it... [This is with
    DEVICE_POLLING and HZ=1000 set in the Kernel config] - using 2 x em [Intel
    Pro-1000TX Cards both @ 100Mbit/FDX].

    -Kp

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