Morning all

I am having problems with my multithreaded tcp listener with IO::Socket. It is leaking memory even after applying the good advice from BrowserUk. I suspect it may be a problem with the Thread::Queue. Here is a simple script that shows the problem (unixy 'cos of ps command, strip that out and use taskmangler to see it on windows).

#!/usr/bin/perl
use strict;
use warnings;
use threads;
use Thread::Queue;
my $queue = Thread::Queue -> new;

threads -> create ("popper", $queue) -> detach for (1..10);

my $message="this is a line of test around the right size";

while (1) {
    $queue -> enqueue ($message) for (1..100);
    sleep 1 while $queue -> pending;
    print $/,`ps -eo vsize,args | grep $0 | grep -v grep`;
}

sub popper {
    print "started a popper\n";
    my $queue = shift;
    while ($queue -> dequeue) {
        print ".";
    }
}

[download]
Here is a snatch of output ... 
 6300 /usr/bin/perl ./threadtest.pl
......................................................................
+..............................
 6316 /usr/bin/perl ./threadtest.pl
......................................................................
+..............................
 6340 /usr/bin/perl ./threadtest.pl
......................................................................
+..............................
 6364 /usr/bin/perl ./threadtest.pl
......................................................................
+..............................
 6408 /usr/bin/perl ./threadtest.pl
......................................................................
+..............................

[download]

Is this because a variable on the queue is being made shared between all threads and never going out of scope ? If so is this fixable or an imutable feature of thread queues ?

Cheers,
R.

Pereant, qui ante nos nostra dixerunt!

In reply to memory leak with Thread::Queue ? by Random_Walk

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