From: "Jérémie Dimino" <jeremie@dimino.org>
To: "Török Edwin" <edwintorok@gmail.com>
Cc: Dario Teixeira <darioteixeira@yahoo.com>, caml-list@yquem.inria.fr
Subject: Re: [Caml-list] scalable web apps
Date: Mon, 26 Jul 2010 09:59:01 +0200 [thread overview]
Message-ID: <20100726075901.GA5561@aurora> (raw)
In-Reply-To: <20100726102904.10ed4768@deb0>
On Mon, Jul 26, 2010 at 10:29:04AM +0300, Török Edwin wrote:
> Lwt's Lwt_preemptive seems to allow one to use 'preemptive
> threads' (which I assume are just usual OCaml threads).
> So would it be possible to put the file I/O on Lwt_preemptive.detach
> threads?
Yes.
> Has anyone tried to measure the performance of doing that?
Yes, i tried it some time ago with two small C programs which were just
reading a file on the disk. One doing read operations in a simple loop,
and one launching a thread for each read operation (or reusing the same
thread). The threaded version was about 100 times slower than the
non-threaded one.
BTW it is planed to add some kind of asynchronous file I/O support in
Lwt by using mmap and mincore.
Best,
--
Jérémie
next prev parent reply other threads:[~2010-07-26 7:58 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-24 7:49 Joel Reymont
2010-07-24 8:57 ` Sylvain Le Gall
2010-07-24 10:55 ` [Caml-list] " William Le Ferrand
2010-07-25 13:52 ` Dario Teixeira
2010-07-25 19:19 ` Joel Reymont
2010-07-26 7:29 ` Török Edwin
2010-07-26 7:59 ` Jérémie Dimino [this message]
2010-07-26 8:19 ` Török Edwin
2010-07-27 6:46 ` Jérémie Dimino
2010-07-26 11:27 ` Dario Teixeira
2010-07-26 19:57 ` Jake Donham
2010-07-26 20:02 ` Török Edwin
2010-07-27 6:55 ` Jérémie Dimino
2010-07-26 9:11 ` Sylvain Le Gall
2010-07-26 11:10 ` [Caml-list] " Dario Teixeira
2010-07-26 12:58 ` Sylvain Le Gall
2010-07-26 13:20 ` [Caml-list] " William Le Ferrand
2010-07-25 19:46 ` [Caml-list] " Richard Jones
2010-07-25 21:45 ` Dario Teixeira
2010-07-25 21:56 ` Joel Reymont
2010-07-25 22:03 ` Gabriel Kerneis
2010-07-25 22:24 ` Dario Teixeira
2010-07-26 7:34 ` Richard Jones
2010-07-26 11:20 ` Dario Teixeira
2010-07-26 16:50 ` Florent Monnier
2010-07-26 17:10 ` Sylvain Le Gall
2010-07-26 17:21 ` [Caml-list] " Gabriel Kerneis
2010-07-26 17:37 ` Sylvain Le Gall
2010-07-25 22:44 ` [Caml-list] " Yoann Padioleau
2010-07-26 9:08 ` Sylvain Le Gall
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