From: Ralf Baechle <ralf@conectiva.com.br>
To: Thomas Duffy <Thomas.Duffy.99@alumni.brown.edu>
Cc: Barry Wu <wqb123@yahoo.com>,
Linux Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: how many cpus can linux support for SMP?
Date: Thu, 17 Jan 2002 00:29:38 -0800 [thread overview]
Message-ID: <20020117002938.A2245@dea.linux-mips.net> (raw)
In-Reply-To: <20020117065841Z288225-13996+7386@vger.kernel.org> <1011252982.5188.5.camel@localhost.localdomain>
In-Reply-To: <1011252982.5188.5.camel@localhost.localdomain>; from Thomas.Duffy.99@alumni.brown.edu on Wed, Jan 16, 2002 at 11:36:19PM -0800
On Wed, Jan 16, 2002 at 11:36:19PM -0800, Thomas Duffy wrote:
> > I am new to this mail list. I do not know how many CPUs linux can
> > support well using SMP. If some one knows, please give me
> > a reply. Thanks.
>
> there is a 32bit cpu mask, meaning 32 is the absolute max, although Ralf
> Baechle has extended it to 64 in order to support SGI origin 2000's, but
> realistically, linux can only do about 8 before falling on the ground...
Actually Kanoj and me hacked it to work with 128. The scalability was
already frightening with 32 and even more so with 128 ...
> depends on your workload really...you should be ok with 4 cpus.
Around 4 procs is certainly the sweet spot currently.
Ralf
--
"Embrace, Enhance, Eliminate" - it worked for the pope, it'll work for Bill.
next prev parent reply other threads:[~2002-01-17 8:30 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-17 6:59 how many cpus can linux support for SMP? Barry Wu
2002-01-17 7:36 ` Thomas Duffy
2002-01-17 7:47 ` Anton Blanchard
2002-01-17 8:29 ` Ralf Baechle [this message]
2002-01-17 7:51 ` Robert Love
2002-01-17 19:43 ` Randy.Dunlap
2002-01-19 0:30 ` James Cleverdon
2002-01-19 1:41 ` Maciej W. Rozycki
2002-01-19 21:54 ` James Cleverdon
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