Hi,
I am using Time:HiRes module. I just measuring the before and after time as shown in the script below. However, in many cases the "after time" comes out less than "before time", when I run it on Windows with multi-core CPU's. I don't get this when I am running the below script on a VM which has Linux with only one processor allocated to it. Why could this be happening?
#!/usr/bin/perl -w
use Time::HiRes;
$count = 1000000; print "\nStarting loop\n";
for ($c = $count; $c >= 1; $c--)
{
$t3 = 0; $t4 =0; $t5 = 0;
#print "\n";
#print "t3: "; printf "%.2f\n",$t3;
#print "t4: "; printf "%.2f\n",$t4;
#print "\n";
$t3 = Time::HiRes::time();
$t4 = Time::HiRes::time();
$t5 = $t4-$t3;
#print "t5: "; printf "%.6f\n",$t5;
if($t5<=0)
{
print"\n Value negative in count: $c";
print "\n t3: "; printf "%.6f",$t3;
print "\n t4: "; printf "%.6f\n",$t4;
print "\n Negative or zero value: $t5";
}
}
print "\nEnd of loop\n";
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