Version française
Home     About     Download     Resources     Contact us    

This site is updated infrequently. For up-to-date information, please visit the new OCaml website at

Browse thread
[Caml-list] Scheduling thread problem kernel 2.6
[ Home ] [ Index: by date | by threads ]
[ Search: ]

[ Message by date: previous | next ] [ Message in thread: previous | next ] [ Thread: previous | next ]
Date: 2004-04-14 (05:55)
From: Christophe Raffalli <Christophe.Raffalli@u...>
Subject: Re: [Caml-list] Scheduling thread problem kernel 2.6
David Brown wrote:
> On Tue, Apr 13, 2004 at 09:57:35AM +0200, Christophe Raffalli wrote:
>>Message posted to comp.os.linux.misc and caml-list.
>>I am having a scheduling problem with a Caml program that uses two threads:
>>- one CPU intensive thread
>>- one interface thread (using Glut + OpenGL) and often doing nothing
> What wrappers are you using to call to the interface.  Are there any
> blocking calls in it?  You might check the wrappers to these calls to
> make sure that they call enter_blocking_section, and
> leave_blocking_section.  Otherwise, the entire ocaml runtime will be
> blocked.

I do not understand ? First I launch the interface thread from Caml with
Thread.create and the interface thread calls Glut.main_loop which never 
ends (except when the program terminates). This main loop call some Caml 

The interface thread (which is the main thread) is affected a lot may be 
because the main_loop sleep while retaining a mutex blocking the 
computing thread. This is hat you mean ?

> Dave

Christophe Raffalli
Université de Savoie
Batiment Le Chablais, bureau 21
73376 Le Bourget-du-Lac Cedex

tél: (33) 4 79 75 81 03
fax: (33) 4 79 75 87 42
IMPORTANT: this mail is signed using PGP/MIME
At least Enigmail/Mozilla, mutt or evolution
can check this signature