From: Jeremy Yallop <yallop@gmail.com>
To: jean-vincent.loddo@lipn.univ-paris13.fr
Cc: Caml List <caml-list@inria.fr>
Subject: Re: [Caml-list] Memory leaks generated by Scanf.fscanf?
Date: Fri, 20 Jun 2014 14:01:52 +0100 [thread overview]
Message-ID: <CAAxsn=GkMuQz_hNqRLxsRbRpK0GxOf_3ZFFq_02bkM_Y95h3Cg@mail.gmail.com> (raw)
In-Reply-To: <e9dba6f33347ae197b0fc1f1974001b0@lipn.univ-paris13.fr>
On 20 June 2014 13:29, <jean-vincent.loddo@lipn.univ-paris13.fr> wrote:
> working on Marionnet (https://launchpad.net/marionnet), I noticed a serious
> memory leak making the system unusable after a few tens of minutes. After
> investigation, the problem seems to be related to Scanf.fscanf.
It looks like your leak is caused by the 'memo' table in the Scanf
module that associates a lookahead buffer with each input channel:
https://github.com/ocaml/ocaml/blob/trunk/stdlib/scanf.ml#L393
as explained by a comment in the Scanf code:
https://github.com/ocaml/ocaml/blob/trunk/stdlib/scanf.ml#L268-L320
Entries are added to the table for each input channel used for
scanning, but there's no mechanism for removing entries. This would
be worth raising on Mantis.
next prev parent reply other threads:[~2014-06-20 13:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-20 12:29 jean-vincent.loddo
2014-06-20 13:01 ` Jeremy Yallop [this message]
2014-06-20 15:35 ` Gabriel Scherer
2014-06-22 17:11 ` Benoît Vaugon
2014-06-23 9:06 ` François Bobot
2014-06-27 14:32 ` Jeremy Yallop
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