Date: Wed, 28 Jan 2004 21:44:35 +0200 From: veedee@c7.campus.utcluj.ro To: freebsd-net@freebsd.org Subject: Re: DEVICE_POLLING with SMP Message-ID: <20040128194435.GA16076@c7.campus.utcluj.ro> In-Reply-To: <B2508BB3-51C7-11D8-B168-000A95A8A1F2@dragondata.com> References: <B2508BB3-51C7-11D8-B168-000A95A8A1F2@dragondata.com>
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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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