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Re^3: How to sleep 1 microsecond?

by sophate (Beadle)
on Aug 17, 2012 at 08:15 UTC ( #987936=note: print w/replies, xml ) Need Help??


in reply to Re^2: How to sleep 1 microsecond?
in thread How to sleep 1 microsecond?

Hi, the sample codes above use usleep. Here is the program using nanosleep.

#!/usr/bin/perl use strict; use warnings; use Time::HiRes qw(usleep nanosleep gettimeofday); my @start = gettimeofday (); my $sleep = nanosleep(1000); my @end = gettimeofday (); print "[$sleep][@start][@end]\n"; Results: [1000][1345190945 846575][1345190945 846739]

Compared with the codes that just get the timestamps two times(without the nanosleep line). The nanosleep actually sleeps much longer than 1 microsecond.

#!/usr/bin/perl use strict; use warnings; use Time::HiRes qw(usleep nanosleep gettimeofday); my @start = gettimeofday (); my @end = gettimeofday (); print "[@start][@end]\n"; Results: [1345190988 610721][1345190988 610723]

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