Performance/lockup issues with FreeBSD as a router

From: Peter Kieser (pfak_at_telus.net)
Date: 05/26/05

  • Next message: Mathieu CHATEAU: "Re: Performance/lockup issues with FreeBSD as a router" 
    Date: Thu, 26 May 2005 10:47:48 -0700
To: freebsd-performance@freebsd.org

    Hello guys,

    I'm not quite sure if this is the right list to address this to, as it's partly
    a performance problem and partly otherwise.

    I have a FreeBSD machine acting as a router (doing approx. 15-25Mbit/s of
    traffic (lot's of small packets, about 45,000 pps)), however I'm currently
    running into issues where one, or both of the NICs will stop transmitting
    traffic. When I go onto the machine, and try to ping something I get "No buffer
    space available"

    The nics are if_dc, this is a stock FreeBSD 5.4-RELEASE installation (no
    firewall or anything):

    Here's my /etc/sysctl.conf:

    net.inet.ip.rtexpire=1800
    net.inet.ip.rtminexpire=1800
    kern.maxfiles=32768
    kern.maxfilesperproc=32768
    kern.ipc.somaxconn=32767
    net.inet.tcp.sendspace=256000
    net.inet.tcp.recvspace=256000
    kern.ipc.maxsockbuf=2097152
    net.inet.ip.fastforwarding=1
    net.inet.tcp.rfc1323=1
    net.link.ether.inet.max_age=600
    net.inet.tcp.msl=7500
    net.inet.ip.fw.dyn_udp_lifetime=10
    net.inet.ip.fw.dyn_buckets=1024

    And here's my /boot/loader.conf:

    kern.ipc.maxsockets="163840"
    kern.maxusers="2048"

    Is there anythign I'm overlooking that would be causing the machine to lockup
    like this?

    --Peter

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  • Next message: Mathieu CHATEAU: "Re: Performance/lockup issues with FreeBSD as a router"

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