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Date:	Tue, 18 Jul 2006 22:15:14 -0400
From:	"Larry Hall (Cygwin)" <reply-to-list-only-lh AT cygwin DOT com>
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To:	cygwin AT cygwin DOT com
Subject:	Re: Perl failure
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Bruce Dobrin wrote:
> Hi,  
> I stripped down the code to a small testable bit.  The problem seems to
> occur when I reach 256 forks on a cygwin1.5.18 or 19 but not on my
> cygwin1.5.5. win2k system.  The original code give the forked process
> time to finish,  but it still looks like it eats it after about 256
> iterations  ( it actually failed between 259 and 252 iterations,  but
> it's pretty complicated so I'm not sure what else was happening).
> 
> Here is my test code:
> dobrin AT tiburon:/tmp> cat test8.pl 
> ################
> #!/usr/bin/perl -w
> 
> use strict;
> my $pid;
> 
> foreach my $incr (`seq 1 1 800`) {
>          
>                     unless (defined ($pid = fork)) {
>                          die " cannot fork $!";
>                      }
>                     unless ($pid) {
>                       print " the sequence is $incr \n";
>                       exit;
>                     }
>              print "pid is $pid\n";
>            }
> 
> ###############
> 
> The error here is :
> cannot fork Resource temporarily unavailable at ./test8.pl line 11.
> panic: MUTEX_LOCK (45) [op.c:354].
> 
> On cygwin1.5.5 it finishes successfully.  I'm not sure if there is
> anything else I can try,  I'm looking around for some other machines
> with older cygwins on them to establish what version it stopped working
> in.


It may make more sense to move forward and see if the problem still
exists in a snapshot version - <http://cygwin.com/snapshots/>.


-- 
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
216 Dalton Rd.                          (508) 893-9889 - FAX
Holliston, MA 01746

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