Mailing list for all users of the OCaml language and system.
 help / color / mirror / Atom feed
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)

[-- Attachment #1: Type: text/plain, Size: 679 bytes --]

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

[-- Attachment #2: Type: text/html, Size: 721 bytes --]

             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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=2184b2340902160715y1f935b5ehc0e6195b3f75b66b@mail.gmail.com \
    --to=remi@gide.net \
    --cc=caml-list@yquem.inria.fr \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox