An option is to use perl's nested hash.
The keys would be your start time / end time and other important tokens, with their values assigned according to the logic in your perl script.
this is what first got me hooked to perl.:D
1 #!/usr/bin/perl
2
3 %process_hash = (
4 'pid_1' => {
5 'start_time' => '00:00:00',
6 'end_time' => '12:00:00'
7 },
8 'pid_2' => {
9 'start_time' => '00:00:01',
10 'end_time' => '12:00:02'
11 }
12 );
13
14 print $process_hash{'pid_2'}->{'start_time'};
please check perlvar,perldata and perlreftut for further info.
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