Re: DEVICE_POLLING with SMP

veedee_at_c7.campus.utcluj.ro
Date: 01/28/04

  • Next message: Ruslan Ermilov: "Re: Large scale NAT - problem resolved" 
    Date: Wed, 28 Jan 2004 21:44:35 +0200
To: freebsd-net@freebsd.org

    On Wed, Jan 28, 2004 at 01:25:13PM -0600, Kevin Day wrote:
    >
    > Has anyone made any headway with getting polling(4) to work with a SMP
    > kernel? Last May this was discussed on here briefly with me, Luigi and
    > Don Bowman, which seemed to indicate that the majority of what needed
    > to be fixed to make this work would be some kind of locking in
    > idle_loop to make sure only one CPU gets into the polling code at once.
    >
    > I've got a case where enabling SMP gives me a 20-30% performance boost,
    > or if I turn polling on I get another 10-15% boost. I'd love to see
    > what the two together could do.

    I was just about to ask the same question. We've just received 2 Athlon MPs
    2400+ and we're about to buy a gigabit Intel PRO/1000MT Dual for one of our
    servers.

    It would be great if SMP could be combined with polling. 

    -- 
| Radu Bogdan 'veedee' Rusu
| NetSysAdm at campus dot utcluj dot ro
| Personal gallery at http://rbrusu.com
| ...mirroring FreeBSD and coffee
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  • Next message: Ruslan Ermilov: "Re: Large scale NAT - problem resolved"

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