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Date:	Wed, 27 Jul 2005 18:49:41 -0400 (EDT)
From:	Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To:	cygwin AT cygwin DOT com
To:	Krzysztof Duleba <krzysan AT skrzynka DOT pl>
cc:	cygwin AT cygwin DOT com
Subject:	Re: perl - segfault on "free unused scalar"
In-Reply-To:	<dc926n$tko$1@sea.gmane.org>
Message-ID:	<Pine.GSO.4.61.0507271847340.21789@slinky.cs.nyu.edu>
References:	<dc7n8k$m72$1 AT sea DOT gmane DOT org> <42E76865 DOT 4000301 AT familiehaase DOT de> <dc82t0$r0a$1 AT sea DOT gmane DOT org> <42E7B413 DOT 8040203 AT familiehaase DOT de> <dc8ebq$36m$1 AT sea DOT gmane DOT org> <Pine DOT GSO DOT 4 DOT 61 DOT 0507271350010 DOT 21789 AT slinky DOT cs DOT nyu DOT edu> <dc926n$tko$1 AT sea DOT gmane DOT org>
MIME-Version:	1.0

On Thu, 28 Jul 2005, Krzysztof Duleba wrote:

> Igor Pechtchanski wrote:
> > On Wed, 27 Jul 2005, Krzysztof Duleba wrote:
>
> > > I've simplified the test case. It seems that Cygwin perl can't handle
> > > too much memory. For instance:
> > >
> > > $ perl -e '$a="a"x(200 * 1024 * 1024); sleep 9'
>
> > > $ perl -e '$a="a"x(1024 * 1024);my %b; $b{$_}=$a for(1..400);sleep 9'
>
> > > $ perl -e '$a="a"x(50 * 1024 * 1024);$b=$a;$c=$a;$d=$a;$e=$a;sleep 10'
> >
> > Yeah.  Set heap_chunk_in_mb to include all available memory, and I'm sure
> > you'll find that Cygwin perl works the same too.
>
> After setting heap_chunk_in_mb to 2048, all those tests passed. Thanks! But I
> still don't understand why C isn't bound by heap_chunk_in_mb and perl is.

I think you're confused.  All Cygwin programs, including those written in
C, are bound by heap_chunk_in_mb.  Unless you are somehow generating a
pure Windows program from your C source (e.g., using "gcc -mno-cygwin")...
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

If there's any real truth it's that the entire multidimensional infinity
of the Universe is almost certainly being run by a bunch of maniacs. /DA

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