From: Larry McVoy <lm@bitmover.com>
To: Ruth Ivimey-Cook <Ruth.Ivimey-Cook@ivimey.org>
Cc: Matti Aarnio <matti.aarnio@zmailer.org>,
Dax Kelson <dax@gurulabs.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Does Solaris really scale this well?
Date: Sat, 17 Aug 2002 17:55:17 -0700 [thread overview]
Message-ID: <20020817175517.A31128@work.bitmover.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0208172358460.3111-100000@sharra.ivimey.org>; from Ruth.Ivimey-Cook@ivimey.org on Sun, Aug 18, 2002 at 12:03:24AM +0100
On Sun, Aug 18, 2002 at 12:03:24AM +0100, Ruth Ivimey-Cook wrote:
> >> "When you take a 99-way UltraSPARC III machine and add a 100th processor,
> >> you get 94 percent linear scalability. You can't get 94 percent linear
> >> scalability on your first Intel chip. It's very, very hard to do, and they
> >> have not done it."
>
> I've seen scientific reports of scalability that good in non-shared memory
> computers (mostly in transputer arrays) where (with a scalable algorithm)
> unless you got >90% you were doing something wrong. However, if you insist on
> sharing main memory, I still don't believe you can get anywhere near that...
> IMO 30% is doing very well once past the first few CPUs.
Please reconsider your opinion. Both Sun and SGI scale past 100 CPUs on
reasonable workloads in shared memory. Where "reasonable" != easy to do.
--
---
Larry McVoy lm at bitmover.com http://www.bitmover.com/lm
next prev parent reply other threads:[~2002-08-18 0:51 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-17 13:02 IDE? Adam J. Richter
2002-08-17 13:22 ` IDE? Alexander Kellett
2002-08-17 17:37 ` IDE? Andre Hedrick
2002-08-17 17:53 ` Does Solaris really scale this well? Dax Kelson
2002-08-17 18:27 ` Matti Aarnio
2002-08-17 23:03 ` Ruth Ivimey-Cook
2002-08-18 0:55 ` Larry McVoy [this message]
2002-08-18 8:35 ` David S. Miller
2002-08-18 10:28 ` venom
2002-08-18 12:33 ` Ruth Ivimey-Cook
2002-08-19 13:42 ` Does Solaris really scale this well? [OT] Dana Lacoste
2002-08-18 1:46 ` Does Solaris really scale this well? venom
2002-08-17 19:51 ` IDE? Alan Cox
2002-08-18 12:43 ` IDE? Alexander Kellett
2002-08-17 18:26 ` IDE? Andreas Dilger
2002-08-19 9:54 ` IDE? Vojtech Pavlik
[not found] <15713.30718.950168.358907@wombat.chubb.wattle.id.au>
2002-08-20 10:13 ` Does Solaris really scale this well? venom
2002-08-20 12:13 ` Jakob Oestergaard
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