From: Richard Jones <rich@annexia.org>
To: John Lepikhin <john@ispsystem.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Re: memory usage
Date: Mon, 12 Jan 2009 20:12:19 +0000 [thread overview]
Message-ID: <20090112201219.GB21039@annexia.org> (raw)
In-Reply-To: <1231782999.4376.246.camel@john-laptop>
On Tue, Jan 13, 2009 at 01:56:39AM +0800, John Lepikhin wrote:
> > I'm afraid to say that you'll have to post a short reproducer here
> > before I can look at this further ...
>
> I'm not sure this is the same issue. Look at this test code:
For reasons I don't fully understand, this code doesn't seem to do
anything. A print statement after the Unix.openfile is never printed.
> let read_data _ =
> let fd = Unix.openfile "/dev/random" [] 0o644 in
You probably want to use something like /dev/urandom or /dev/zero
here. This blocks after a very short time because /dev/random (on
Linux) only produces characters while there is entropy in the kernel.
(Not for very long once you start reading blocks of it from 20
threads).
Rich.
--
Richard Jones
Red Hat
next prev parent reply other threads:[~2009-01-12 20:12 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-12 7:41 John Lepikhin
2009-01-12 8:39 ` [Caml-list] " Richard Jones
2009-01-12 9:14 ` John Lepikhin
2009-01-12 10:45 ` Sylvain Le Gall
2009-01-12 11:28 ` [Caml-list] " John Lepikhin
2009-01-12 11:41 ` Richard Jones
2009-01-12 15:03 ` John Lepikhin
2009-01-12 19:55 ` Richard Jones
2009-01-12 17:56 ` John Lepikhin
2009-01-12 20:12 ` Richard Jones [this message]
2009-01-12 21:34 ` John Lepikhin
2009-01-12 22:01 ` Richard Jones
2009-01-13 16:00 ` John Lepikhin
[not found] ` <20090112114837.GB18405@janestcapital.com>
2009-01-12 15:05 ` [Caml-list] " John Lepikhin
2009-01-12 16:29 ` Florian Hars
2009-01-12 16:44 ` John Lepikhin
2009-01-12 17:55 ` Sylvain Le Gall
2009-01-12 18:01 ` [Caml-list] " John Lepikhin
2009-01-12 18:26 ` Sylvain Le Gall
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