in reply to Proc::Queue problem

You don't want to parallelize your main tasks so, don't fork on your main loop and ensure that no children are running at the end of every iteration: 
use Proc::Queue size => 5;

for (1..20) {
  # you don't want to fork here!!!
  do_task($_);
  1 while wait != -1;
}

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Re^2: Proc::Queue problem
by afresh1 (Hermit) on Oct 24, 2008 at 01:57 UTC

    I took it that he wanted to parallize several sub-tasks, like

    foreach (@subtask1) {
    fork;
    # do subtask1
}

wait; # for all subtasks to finish

foreach (@subtask2) {
    fork;
    # do subtask2
}

wait; # for all subtasks to finish

repeat for subtaskX

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    l8rZ,
    --
    andrew
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