From: Damien Doligez <damien.doligez@inria.fr>
To: caml-list@inria.fr
Subject: Re: [Caml-list] Why systhreads?
Date: Wed, 27 Nov 2002 14:12:34 +0100 [thread overview]
Message-ID: <E4BA1D26-0209-11D7-8024-0003930FCE12@inria.fr> (raw)
In-Reply-To: <4.3.2.7.2.20021125134858.037b4ef8@localhost>
On Monday, Nov 25, 2002, at 23:20 Europe/Paris, Chris Hecker wrote:
> However, HT changes the cost/benefit equation. How much remains to be
> seen, of course.
Do you really think so ? In my experience, 95% of the costs of threads
(with shared memory) are in the debugging (of the threads
implementation,
AND of the programs). Cheap SMP machines and HT do not change the
cost/benefit equation very much.
More important, you don't need threads and shared memory to make use
of a SMP machine. Any kind of parallelism will do. Several processes
with message-passing can easily get you 100% load on all your
processors.
Also, message-passing is more general; for example it will work on
clusters.
So my opinion is: multiprocessing good, threads bad.
-- Damien
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next prev parent reply other threads:[~2002-11-27 13:11 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
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 [this message]
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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