Date: Thu, 22 Jan 2004 00:45:15 -0600 From: "Brandon D. Valentine" <brandon@dvalentine.com> To: "Bakken, Luke" <Luke.Bakken@getronics.com> Cc: freebsd-ports@freebsd.org Subject: Re: perl 5.8.2 memory leak? Message-ID: <20040122064515.GK10936@geekpunk.net> In-Reply-To: <407DF7D68DD30440B5CEB70ED234D1CF04764B5D@excuswa100.americas.unity> References: <407DF7D68DD30440B5CEB70ED234D1CF04764B5D@excuswa100.americas.unity>
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On Wed, Jan 21, 2004 at 06:22:00PM -0800, Bakken, Luke wrote: > > One difference I did note is in the output of perl -V: > > 5.6.1 -> usemymalloc -> 'n' > 5.8.2 -> usemymalloc -> 'y' The perl5 and perl5.8 ports both have a WITH_PERL_MALLOC option. If this option is defined then the port uses Perl's malloc (usemymalloc=y), if it's undefined it uses the system malloc (usemymalloc=n). In lang/perl5.8 the default is to use Perl's malloc unless WITH_THREADS is defined, in which case it falls back to using the system malloc. In lang/perl5 the default is to use the system malloc. I am uncertain why the defaults are set differently between the two versions of Perl. Perhaps the Perl maintainer could shed some more light on that. At any rate if you build lang/perl5.8 with WITHOUT_PERL_MALLOC defined you can test your theory that the Perl malloc is the cause of your memory leak. [ For future reference, everything I told you above could have been divined from a glance at the relevant port Makefiles. ] Your code could be exposing a bug in the Perl malloc implementation. You should also consider the possibility that your code or one of the modules you are making use of is the cause of the memory leak and perhaps the Perl malloc implementation merely exacerbates the problem. At any rate the best way to find out is to create the simplest possible example program which triggers the bug. Take that program and run it through a Perl interpreter on FreeBSD using both the Perl malloc and the system malloc and then do the same on a Linux machine and compare. If you do this, please take that information and file an upstream bug report against Perl. HTH, Brandon D. Valentine -- brandon@dvalentine.com http://www.geekpunk.net Pseudo-Random Googlism: truth is relative einstein's theory may have to be turned on its head
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