Jeremy,
I assume you are probably running the POE version installed through
ActiveStates ppm.
This seems to have issues and I found that by installing through CPAN that
there is a newer version of POE that seems to have a lot of performance
issues fixed. Rather than installing through active states ppm (which seems
to be behind a few POE versions), you can install POE through CPAN:
perl -MCPAN -e "install POE"
See if that helps at all.
Z
On 6/24/07, Jeremy Palmer <[EMAIL PROTECTED]> wrote:
Hi,
I'm building a Win32 POE application that need to make a non-blocking call
to a function in an external Perl package. This function takes references to
Perl objects and array references (however no subroutine refs).
I've looked at the options for completing this sort of task with
POE::Component::Child & Wheel::Run + Filter::Reference, however there seems
to be one limiting factor here - Win32 fork emulation.
The Win32 fork emulation seems very buggy. In tests I've used with
Wheel::Run I get fork failures (i.e. "fork() failed: Resource temporarily
unavailable") after the 64 calls of fork from the parent process. See the
attached simple example that demos the error:
use strict;
use warnings;
my $COUNT = 0;
my $MAXFORK = 2**6;
while ( $COUNT <= $MAXFORK ) {
my $pid = fork();
die "fork() failed: $!" unless defined $pid;
if ($pid) {
$COUNT++;
print "Fork count $COUNT\n";
}
else {
# in child
exit(0);
}
}
Also when running a code subroutine, passing in variables, with Wheel::Run
and Filter::Reference I get huge memory leaks after the forked off child
thread exits. I can't exactly track where the leaks are occurring, but it
seems to have something to do with including packages at runtime using the
"require" keyword. I also get the same issues with POE::Component::Child
which is no surprise considering it also uses Wheel::Run +
Filter::Reference.
I was hoping if someone might have any suggestions as to how I might come
up with a solution to this problem. Moving from Win32 to *NIX is not an
option.
I have thought about using Win32::Process and running a Perl process in
the background (so the kernel can take responsibility for the memory
allocation etc) and then having a POE delayed event that checks every second
or so to see if the process is complete. I'm however unsure on how to pass
specific runtime variables to the spawned off Perl process.
Any help on fixing POE::Wheel::Run or providing another solution would be
greatly appreciated.
I'm using WinXP SP2, ActiveState Perl v5.8.8 Build 820 and POE 0.9917.
Thanks
Jeremy
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