Date: Mon, 1 Dec 1997 09:37:51 -0800 (PST) From: Tom <tom@uniserve.com> To: Andrzej Bialecki <abial@korin.warman.org.pl> Cc: freebsd-current@freebsd.org Subject: Re: SMP: binding process to CPU Message-ID: <Pine.BSF.3.96.971201093615.28657B-100000@shell.uniserve.com> In-Reply-To: <Pine.NEB.3.95.971201120020.8098D-100000@korin.warman.org.pl>
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On Mon, 1 Dec 1997, Andrzej Bialecki wrote:
> > Use rtprio on that process. If the priority is high enough, the process
> > will pretty much hog a CPU. This can be dangerous, as other processes
> > may not run at all, but on SMP there is at least one more CPU for other
> > processes to run on.
>
> Well, yes... But I'm pretty sure that the same process gets scheduled on
> BOTH processors (I don't know how actually the scheduler does it,
> though). So I think that if I bounce rtprio high enough, the process in
> question will monopolize BOTH CPU's. Am I right?
Well, unless you have kernel threading working, and your process is
multi-threaded, it will can only be running on one CPU at a time.
> Andrzej Bialecki
>
> ---------------------+---------------------------------------------------------
> abial@warman.org.pl | if(halt_per_mth > 0) { fetch("http://www.freebsd.org") }
> Research & Academic | "Be open-minded, but don't let your brains to fall out."
> Network in Poland | All of the above (and more) is just my personal opinion.
> ---------------------+---------------------------------------------------------
Tom
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