From owner-freebsd-smp  Mon Nov 12 22:36:26 2001
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Date: Tue, 13 Nov 2001 15:37:26 +0900
Message-ID: <sa6eln3ch21.wl@ring.myn.rcast.u-tokyo.ac.jp>
From: Hiroharu Tamaru <tamaru@myn.rcast.u-tokyo.ac.jp>
To: freebsd-smp@FreeBSD.org
Cc: "Andrew R. Reiter" <arr@FreeBSD.org>,
	Hiroharu Tamaru <tamaru@myn.rcast.u-tokyo.ac.jp>,
	Alfred Perlstein <bright@mu.org>, John Baldwin <jhb@FreeBSD.org>,
	Terry Lambert <tlambert2@mindspring.com>
Subject: Re: cpu affinity
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Great! I'll try this patch as well when things get set up.
I'll be back again after playing around with them.

Thanks again.

At Mon, 12 Nov 2001 11:59:42 -0600,
Alfred Perlstein wrote:
> 
> * 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

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