Perl failure
Larry Hall (Cygwin)
reply-to-list-only-lh@cygwin.com
Wed Jul 19 02:59:00 GMT 2006
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@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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