bge driver, how to increase performance?

From: Ferdinand Goldmann (ferdinand.goldmann_at_jku.at)
Date: 11/23/05

  • Next message: Jeremie Le Hen: "Re: Alpine4Linux" 
    Date: Wed, 23 Nov 2005 15:43:17 +0100
To: freebsd-net@freebsd.org

    Hello,

    I have a 3com 3c996-SX card running under FreeBSD 5.4-STABLE.
    Performance is quite ok so far, but interrupt load is very high.
    (Machine is working as a traffic shaping device/firewall)

    # vmstat -i
    interrupt total rate
    irq18: bge0 153244636 5014
    irq27: fxp0 102056377 3339

    Often, interrupt load will hit almost 100%. I guess the bge driver does not
    support polling, but I remember reading somewhere that it supports interrupt
    moderation? How would I enable this? On the em driver, this could be done via
    sysctl. Does anyone have hints on performance improvement concerning interrupt
    load?

    TIA 

    -- 
 >> Ferdinand Goldmann                                   ////  |          |
 >>                                                     |--00  |    UNIX  |
 >> Tel. : +43/732/2468/9398 Fax. : +43/732/2468/9397   C   ^  |          |
 >> EMail:  Ferdinand.Goldmann@zid.uni-linz.ac.at        \ ~/  ~~~|~~~~~~~~
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