From: Vitaly Lugovsky <vsl@ontil.ihep.su>
To: Tim Freeman <tim@fungible.com>
Cc: <dbely@mail.ru>, <caml-list@inria.fr>
Subject: Re: [Caml-list] Why systhreads?
Date: Fri, 29 Nov 2002 16:25:11 +0300 (MSK) [thread overview]
Message-ID: <Pine.LNX.4.33.0211291624150.29030-100000@ontil.ihep.su> (raw)
In-Reply-To: <20021127153447.107B47F86@lobus.fungible.com>
On Wed, 27 Nov 2002, Tim Freeman wrote:
> > I tried OCaml in a non memory-consuming numerical applications on SMP.
> >Seems to work well enough (100% load of all the processors).
>
> Wrong metric. You want speedup, not CPU utilization. You can get CPU
> utilization for free by running an infinite loop. Did the application
> run anywhere near N times faster when you were using N processors?
Yes. But, >80% of the system time was in external C functions, without
any memory management. So, really wrong metric...
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next prev parent reply other threads:[~2002-11-29 13:25 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-23 9:08 Lauri Alanko
2002-11-24 7:36 ` Sven Luther
2002-11-24 17:41 ` Chris Hecker
2002-11-24 18:12 ` Basile STARYNKEVITCH
2002-11-24 21:10 ` Christopher Quinn
2002-11-24 17:14 ` Vitaly Lugovsky
2002-11-24 17:18 ` Lauri Alanko
2002-11-24 18:27 ` Dmitry Bely
2002-11-24 23:14 ` Vitaly Lugovsky
2002-11-27 14:33 ` Tim Freeman
2002-11-29 13:25 ` Vitaly Lugovsky [this message]
2002-11-25 10:01 ` Xavier Leroy
2002-11-25 14:20 ` Markus Mottl
2002-11-25 19:01 ` Blair Zajac
2002-11-25 21:06 ` james woodyatt
2002-11-25 22:20 ` Chris Hecker
2002-11-26 6:49 ` Sven Luther
2002-11-27 13:12 ` Damien Doligez
2002-11-27 18:04 ` Chris Hecker
2002-11-27 21:04 ` Gerd Stolpmann
2002-11-27 21:45 ` [Caml-list] Calling ocaml from external threads Quetzalcoatl Bradley
2002-11-26 9:02 ` [Caml-list] Why systhreads? Xavier Leroy
2002-11-26 9:29 ` Sven Luther
2002-11-26 9:34 ` Xavier Leroy
2002-11-26 9:39 ` Sven Luther
2002-11-26 18:42 ` Chris Hecker
2002-11-26 19:04 ` Dave Berry
2002-11-27 0:07 ` Lauri Alanko
2002-11-26 19:23 Gregory Morrisett
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