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From: "Rémi Dewitte" <remi@gide.net>
To: caml-list@yquem.inria.fr
Subject: Threads performance issue.
Date: Mon, 16 Feb 2009 16:15:11 +0100	[thread overview]
Message-ID: <2184b2340902160715y1f935b5ehc0e6195b3f75b66b@mail.gmail.com> (raw)

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Hello,

I would like to read two files in two different threads.

I have made a first version reading the first then the second and it takes
2.8s (native).

I decided to make a threaded version and before any use of thread I realized
that just linking no even using it to the threads library makes my first
version of the program to run in 12s !

I use pcre, extlib, csv libraries as well.

I guess it might come from GC slowing down thinks here, doesn't it ? Where
can it come from otherwise ? Is there a workaround or something I should
know ?

Can ocaml use multiple cores ?

Do you have few pointers on libraries to make parallel I/Os ?

Thanks,
Rémi

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             reply	other threads:[~2009-02-16 15:15 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-02-16 15:15 Rémi Dewitte [this message]
2009-02-16 15:28 ` [Caml-list] " Michał Maciejewski
2009-02-16 15:32   ` Rémi Dewitte
2009-02-16 15:42     ` David Allsopp
2009-02-16 16:07       ` Rémi Dewitte
2009-02-16 16:32 ` Sylvain Le Gall
2009-02-17 13:52   ` [Caml-list] " Frédéric Gava
2009-02-16 16:47 ` [Caml-list] " Yaron Minsky
2009-02-16 17:37   ` Rémi Dewitte
2009-02-17  7:40     ` Rémi Dewitte
2009-02-17  8:59       ` Mark Shinwell
2009-02-17  9:09         ` Rémi Dewitte
2009-02-17  9:53         ` Jon Harrop
2009-02-17 10:07       ` Sylvain Le Gall
2009-02-17 10:26         ` [Caml-list] " Mark Shinwell
2009-02-17 10:50           ` Rémi Dewitte
2009-02-17 10:56             ` Mark Shinwell
2009-02-17 11:33             ` Jon Harrop
2009-02-17 12:20         ` Yaron Minsky
2009-02-17 12:26           ` Rémi Dewitte
2009-02-17 17:14           ` Sylvain Le Gall

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