Date: Mon, 15 Nov 2004 14:57:08 -0500 From: Lucas Holt <luke@foolishgames.com> To: axel.gruner@suedfactoring.de Cc: freebsd-questions@freebsd.org Subject: Re: device polling on SMP box Message-ID: <88478FE6-3740-11D9-89CA-000A95EFF4CA@foolishgames.com> In-Reply-To: <20041115105749.GA41266@pcs28.suedfactoring.de> References: <20041115105749.GA41266@pcs28.suedfactoring.de>
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There is an assumption that it would be faster to have 2 cpus process the interupts than to use polling which can run on one processor at a time. On my system, it appears to be faster to use polling. I have a dual xeon 2.0 ghz. On Nov 15, 2004, at 5:57 AM, Axel S. Gruner wrote: > Hi. > > I am just wondering why "options DEVICE_POLLING" is not possible with > a SMP-Kernel. > Well, i know that there is a workaround with > "/usr/src/sys/kern/kern_poll.c" which works perfectly building a SMP > Kernel with polling. > My question is, are there any known problems with SMP+polling or why is > it not possible by default? > > asg > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" > > Lucas Holt Luke@FoolishGames.com ________________________________________________________ FoolishGames.com (Jewel Fan Site) JustJournal.com (Free blogging)
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