Dear Monks,

I have a perlscript called swap.pl an want to start it several times with another perl script to use my 4 CPU cores. Each time, the swap.pl script processes a different part of a given dataset. My code looks like:

foreach(1..$number_of_cpus)
    {
    open(TEMP_CTRL,">temp_ctrl");
    print TEMP_CTRL "$_"; # contains information for swap.pl
    close TEMP_CTRL;
    system("swap.pl"); # swap.pl reads temp_ctrl to know which part of
+ the dataset to process
    sleep(1);
    }

[download]

The problem is, that the system command waits until the process is finished, which means there is no parallelization at all. And the problem with exec command is that it does not return.

Can anyone help?

UPDATE: Thanks for the suggestions. I found 

system(1,"swap.pl")

[download]
to work well.

In reply to exec vs. system by Microcebus

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