From: Xavier Leroy <Xavier.Leroy@inria.fr>
To: Tom Hawkins <tom@launchbird.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Immediate Out_of_memory
Date: Tue, 13 Jul 2004 16:32:59 +0200 [thread overview]
Message-ID: <20040713143259.GA22456@yquem.inria.fr> (raw)
In-Reply-To: <200407130910.12206.tom@launchbird.com>
> After making a few minor changes, my program started raising the
> Out_of_memory exception. The strange thing is it fires a split
> second after the program starts. It happens so fast, 'top' doesn't
> even have a chance to register it on its radar.
> I narrowed it down to a 'Hashtbl.find' application.
This is very likely due to a structural comparison (via =, like
Hashtbl.find does) between cyclic structures. Structural comparison
maintains a recursion stack that is bounded, and raises Out_of_memory
when that stack overflows. With 3.08, you can confirm this hypothesis
by running with OCAMLRUNPARAM set to 'v=63'; structural comparison
will print a message if it runs out of recursion stack.
- Xavier Leroy
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next prev parent reply other threads:[~2004-07-13 14:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-13 14:10 Tom Hawkins
2004-07-13 14:32 ` Xavier Leroy [this message]
2004-07-14 2:33 ` Tom Hawkins
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