From: Philippe Wang <philippe.wang.lists@gmail.com>
To: "Michał Maciejewski" <michal.m.pl@gmail.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Threads - how it actually works?
Date: Sat, 27 Jun 2009 18:27:13 +0200 [thread overview]
Message-ID: <4d1b2df20906270927v3e32513fh9ad355b2bcdc884@mail.gmail.com> (raw)
In-Reply-To: <906164100906270339j3af90566ta6545d3086449219@mail.gmail.com>
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if you have a thread that never allocates any value in the memory heap, then
the thread may prevent the GC from working properly...
2009/6/27 Michał Maciejewski <michal.m.pl@gmail.com>
> Hi,
>
> Some time ago I had some problems with threads. I had to make a
> traffic lights simulation with cars as a academic project. I decided
> to write it using ocaml with graph module and threads for timing
> (since thread pausing didn't work in the same thread that the graph
> module worked). If I remember correctly there was a loop in graph
> module thread that was drawing some objects. Another looped thread was
> changing objects positions and then was paused for some amount of time
> using (I think) Unix module. I know that wasn't a good and optimal way
> to do it, but I had only few days for it.
>
> Now the problem was that one of those thread never worked. It looked
> like a graph thread was using whole cpu time, and there was no context
> switching. Don't ask me to paste any code, because I dont have it. It
> was quite long time ago and I had to do my project without timing. :-)
> It was ocaml 10.*. So how threads are actually implemented in caml?
> Using some kind of timing or atomic operations?
>
> regards
> M
>
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--
Philippe Wang
mail@philippewang.info
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prev parent reply other threads:[~2009-06-27 16:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-27 10:39 Michał Maciejewski
2009-06-27 16:27 ` Philippe Wang [this message]
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