Re: bge driver, how to increase performance?

From: Atanas Yankov (xds_at_LanGame.Net)
Date: 11/23/05

  • Next message: Julian Elischer: "Re: Alpine4Linux" 
    Date: Wed, 23 Nov 2005 17:44:19 +0200
To: freebsd-net@freebsd.org

    for bge0
    #ifconfig bge0 mtu 9000
    N.B MTU has to be consistent on LAN and you need Gigabit equipment that can handle jumbo frames
    for fxp0
    #ifconfig fxp0 link0

                  
                Some chip revisions have loadable microcode which can be used to
                reduce the interrupt load on the host cpu. Not all boards have
                microcode support. Setting the link0 flag with ifconfig(8) will
                download the microcode to the chip if it is available.

    for all system you cand try

    net.inet.ip.fastforwarding=1

    But do this carefully there some problems on 4.x with fastforwarding
    feature and dummynet and dot.1q vlans on 5.x its seems to work :))

    br,

    CCNP Atanas Yankov
    Network Administrator
    AngelSoft Ltd.

    Ferdinand Goldmann wrote:

    > 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

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    • Re: bge driver, how to increase performance?
      ... F> I have a 3com 3c996-SX card running under FreeBSD 5.4-STABLE. ... F> Performance is quite ok so far, but interrupt load is very high. ... I guess the bge driver does not ...
      (freebsd-net)
    • bge driver, how to increase performance?
      ... Performance is quite ok so far, but interrupt load is very high. ... (Machine is working as a traffic shaping device/firewall) ... I guess the bge driver does not ...
      (freebsd-net)