Dear Monks,

I'm writing some codes that need to sleep for a very short time, say 1 microsecond. I tried "Time-HiRes" and used "usleep" or "nanosleep". However, usleep and nanosleep actually sleep much longer than 1 microsecond. From the returned value of the function calls, they sleep about 1 milisecond(1000 microseconds) even though I specify the sleep interval to 1 microsecond. Here is my program. Any suggestions how I can force my Perl program to sleep about 1 microsecond? Thanks in advance.

#!/usr/bin/perl
use strict;
use warnings;

use Time::HiRes qw(usleep nanosleep gettimeofday);

my @start = gettimeofday ();
my $sleep = usleep(1);
my @end = gettimeofday ();
print "[$sleep][@start][@end]\n";

---------------------------------------
Sample Results:
[805][1345188496 560216][1345188496 561029]

[download]

In reply to How to sleep 1 microsecond? by sophate

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