Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Date: Tue, 24 Sep 2002 23:03:15 -0400 From: Christopher Faylor To: cygwin@cygwin.com Subject: Re: limit for # of items created with "new" ? Message-ID: <20020925030315.GB10139@redhat.com> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <5.1.0.14.2.20020924185910.02c3d7c8@pop3.cris.com> <5.1.0.14.2.20020924185910.02c3d7c8@pop3.cris.com> <5.1.0.14.2.20020924192949.0302a7e8@pop3.cris.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5.1.0.14.2.20020924192949.0302a7e8@pop3.cris.com> User-Agent: Mutt/1.4i On Tue, Sep 24, 2002 at 07:33:03PM -0700, Randall R Schulz wrote: >At 19:10 2002-09-24, you wrote: >>On Tue, Sep 24, 2002 at 07:06:22PM -0700, Randall R Schulz wrote: >>>Hans, >>> >>> ... >>> >>>If I understand correctly, all Cygwin app memory comes out of a single >>pool >>>(hence the Cygwin heap size registry entry), so a proper accounting of >>>available memory must take the other concurrently executing Cygwin >>>applications into account. >> >>Sorry. This isn't correct. Each application gets its own fixed-size heap. >>The heap isn't shared between applications. > >Chris, > >No. I'm the one who's sorry for posting disinformation. Well, that's a pretty rare event, so I think you can be excused, just this once. :-) I think what may be confusing in this case is that cygwin's shared memory region is getting corrupted. I think it's due to the fact that something is walking off the end of the heap. I don't know why an exception isn't being thrown though. FWIW, the next version of cygwin may actually be able to deal with this scenario a little better. It uses Doug Lea's malloc package and may be able to allocate memory using mmap. I haven't actually tried this scenario yet but if anyone wants to try a recent snapshot, it might be informative. cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/