C:/Perl_64/bin\perl.exe  d:/Users/lanx/pm/core_sleep.pl 
Version 5.016003 at d:/Users/lanx/pm/core_sleep.pl line 4.
Prototype;$ at d:/Users/lanx/pm/core_sleep.pl line 5.
start wrapper at d:/Users/lanx/pm/core_sleep.pl line 13.
stop wrapper at d:/Users/lanx/pm/core_sleep.pl line 16.
total sleep( 3 ) at d:/Users/lanx/pm/core_sleep.pl line 26.