my $time_to_run = time;

while ($time_to_run)
{
     # If it's time to run...
     if (time < $time_to_run)
     {
           DoSomething();

           # ...then wait 10 minutes (60 seconds * 10)
           $time_to_run += 60*10;
     }
     else
     {
           # Snooze for 10 seconds
           select(undef,undef,undef,10.0);
     }
}