DEVICE_POLLING together with link0 interrupt offloading?

From: Roderick van Domburg (r.s.a.vandomburg_at_student.utwente.nl)
Date: 09/26/03

  • Next message: Marko Zec: "Re: DEVICE_POLLING together with link0 interrupt offloading?" 
    To: <freebsd-net@freebsd.org>
Date: Fri, 26 Sep 2003 10:59:00 +0200

    Hello everyone,

    Just curious: I just noticed that DEVICE_POLLING works perfectly well with
    the interrupt offloading feature of the fxp driver (link0). In my
    understanding, both try to improve ``network scheduling'' for lack of better
    words - especially under load. Also I now understand that DEVICE_POLLING is
    preferred over interrupt offloading, especially on routers.

    But just for the sake of curiosity: what does enabling _both_ bring about to
    the network performancy and latency? I'm thinking that latency would be
    greatly increased because the poller would often miss the bundled packets.

    What's your take on this?

    Regards,

    Roderick

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  • Next message: Marko Zec: "Re: DEVICE_POLLING together with link0 interrupt offloading?"