Change your long sleep to a loop: 

my $count = 100;
sleep 1 while --$count;

[download]

This will consume negligable cpu but remain responsive even under safe-signals on any platform.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
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In reply to Re: sleep and waking on signal handlers by BrowserUk
in thread sleep and waking on signal handlers by TedYoung

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