Date: Mon, 12 Nov 2001 11:59:42 -0600 From: Alfred Perlstein <bright@mu.org> To: "Andrew R. Reiter" <arr@FreeBSD.org> Cc: Hiroharu Tamaru <tamaru@myn.rcast.u-tokyo.ac.jp>, freebsd-smp@FreeBSD.org, John Baldwin <jhb@FreeBSD.org> Subject: Re: cpu affinity Message-ID: <20011112115942.N89342@elvis.mu.org> In-Reply-To: <Pine.NEB.3.96L.1011112124127.28029D-100000@fledge.watson.org>; from arr@FreeBSD.org on Mon, Nov 12, 2001 at 12:45:41PM -0500 References: <sa6g07jdib6.wl@ring.myn.rcast.u-tokyo.ac.jp> <Pine.NEB.3.96L.1011112124127.28029D-100000@fledge.watson.org>
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* Andrew R. Reiter <arr@FreeBSD.org> [011112 11:46] wrote: > > One idea I had been thinking about, tho Im sure others have already > thought about doing this many times, is to allow for something like > chooseproc() to choose a cpu that is on another machine. So, as a stupid > example, say we have a process/thread controlling utility (psctl)... one > would be able to: > > psctl --move --process=<pid> --cpu-location=host:cpu# > > Im not sure how useful this would be for anyone outside myself to use, but > would be interesting to see what we could do with SMP and KSE as things > become stable later on. Like I said, I believe this work has already been > done, but imo is something interesting nevertheless. I've done this work and proved a small but measurable performance improvement using my method. http://people.freebsd.org/~alfred/bind_cpu.diff I'm not sure if that's the one that'll work ATM, i know that KSE most likely broke it and it doesn't include my patch to psctl to fiddle the boundness of a process. I'll try to look it up again. -Alfred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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