zentara, not sure if your code addresses the problem. The OP seems to want to run one process continuously and every 10 minutes pause that process to run another.

I might try something with alarm.

#! /usr/bin/perl -w

$SIG{ALRM} = \&ten_min_task;

alarm(600);
while (1) {
    # run in between task here
    #sleep 1; print "foo\n";
}

sub ten_min_task {
    alarm(600);
    # run this code every 10 minutes
    #print "bar\n";
}
[download]

Set the alarm timer back to 600s at the beginning of the ten minute task (as shown) to keep execution every 10 minutes regardless of its execution time. Put it at the end of the function if you want it to execute 10 minutes from its last completion.