I have some processes that depend on other processes before starting. I'm trying to come up with a way to compute the "avg" start time. The problem is, sometimes, the start time will cross midnight. At first, I thought I could just get the # of seconds since the epoch, avg them, and then divide. But, as you can see in this case, that just doesn't work. Ideas? 
#!/bin/perl
use Date::Calc qw(Date_to_Time);
use POSIX;

$time1 = Date_to_Time(2007,8,8,23,00,0);
$time2 = Date_to_Time(2007,8,9,03,00,0);
$time3 = Date_to_Time(2007,8,10,01,00,0);

print "$time1\t$time2\t$time3\n";

$avg = sprintf "%0.0f", (($time1+$time2+$time3)/3);
print "$avg\n";

print strftime "%H:%M:%S\n", gmtime($avg);

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OUTPUT:
1186614000 1186628400 1186707600
1186650000
09:00:00 ---------------------------------- This seems to do it. I can ignore the actual mm/dd/yy that the job ran on and just pay attention to what time of day it started. If it started before 5pm, then I know it crossed midnight since all jobs kick off at 5pm. 
$count = 0;
$starthour = 17;

foreach $time (@times) {
        $count ++;
        ($hour,$minute,$second) = split(/:/,$time`);
        if ($hour >= $starthour) {
                $time += Date_to_Time(1970,1,1,$hour,$minute,$second);
        }
        else {
                $time += Date_to_Time(1970,1,2,$hour,$minute,$second);
        }
}

$timeavg = $time/$count;
print strftime '%H:%M:%S', gmtime($timeavg);

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In reply to Getting avg start time by Earindil

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