PPP performance

From: Javi Lavandeira (ag0ny_at_ag0ny.com)
Date: 09/01/03

  • Next message: Marc Fonvieille: "Re: PPP performance" 
    Date: Mon, 1 Sep 2003 12:09:02 +0900 (JST)
To: freebsd-performance@freebsd.org

    Hi,

    I'm running a 4.6.2-RELEASE system on a PPPoE link, using user-ppp. Since
    saturday, we're running a new service on this host, and we're getting
    around 160 DNS requests/second, using tinydns, serving several zones. One
    of them containing several hundred thousand records. Bandwidth usage is
    low: around 25KBytes in and 80-100KBytes out average.

    The problem is that now user-ppp seems to be eating up 25% of the CPU:

      PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
       76 root 30 0 3976K 2364K RUN 727:32 22.17% 22.17% ppp

    This system has been running for more than a year, and there have been
    transfer peaks of more than 20MBits/s, without impacting the ppp daemon in
    this way.

    Any ideas about why ppp is causing this load, and how to solve the
    problem? I've been googling about this, and read something about
    kernel-ppp being faster, but couldn't find anything about kernel-ppp in
    the handbook.

    Thanks in advance,

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  • Next message: Marc Fonvieille: "Re: PPP performance"