Your program finishes too fast. Try this: 

use threads;
use threads::shared;
my $test :shared;
$test = 0;
testing_thread();

sub testing_thread {
        my $thr1 = threads->create(\&progress_count, $test);
        while ($test <= 1000000) {
                $test += 1;
        }
        $thr1->join();
}

sub progress_count {
        while( $test < 1000000 ) {
                print $test, " \n";
        }
}

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In reply to Re^3: Threading in a loop by hdb
in thread Threading in a loop by jerre_111

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