decreasing interrupt CPU load

From: Oleg Gawriloff (barzog_at_telecom.by)
Date: 10/20/04

  • Next message: Eric Anderson: "Re: decreasing interrupt CPU load" 
    To: <freebsd-performance@freebsd.org>
Date: Wed, 20 Oct 2004 15:08:26 +0300

    Hello!

    Currently we have router on FreeBSD 4.10-R on SMP 2*PIII 1Ghz. 5sec average
    traffic trhough fxp on Intel 82550 is about 12kpps (26Mbit/sec). CPU Load on
    interrupts shown in top and systat -v 1 always above 40%. We've tried to
    enable polling with HZ=1000, but cpu load does not change, instead round
    trip time increased from 1ms to 20ms. Also we've tried link0, no success. Is
    any other options to decrease interrupt cpu load? May be enabling fast
    forwarding, change fxp to em or bge NIC? Is there exist any drawbacks from
    enabling fast forwarding?

    With best regards, Oleg Gawriloff.

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  • Next message: Eric Anderson: "Re: decreasing interrupt CPU load"

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