Octavian,
I am not sure of another HPUX utility that calculates the CPU utilization percentage on the fly like top does. Since you are being tasked to do this, I am betting this is the value they want you to use.

#!/usr/bin/perl -w
use strict;

unlink "/tmp/prochogs.$$" if (-e "/tmp/prochogs.$$");
system ("top -u -h -d1 -s1 -f /tmp/prochogs.$$");

open (TOP,"/tmp/prochogs.$$") or die "Unable to open top file - $!";

my %Proc;
my $FoundList;
while (<TOP>) {    
    if (/^CPU/) {
        $FoundList = 1;
        next;
    }
    next unless ($FoundList);
    my @Values = split;
    $Proc{$Values[2]} = \@Values;
}
foreach(keys %Proc) {
    print "$_ : $Proc{$_}->[11]\n";
}
[download]

So why write the output to a file and read it back in instead of creating a pipe? Well, when run interactively, top on HPUX formats the output with a bunch of ANSI escape sequences that is a pain to parse.

This should give you what you want and is easy to modify. You want to make sure your temporary file makes sense on your system.

Cheers - L~R