-sub mlfqs_stats {
- my (@output) = @_;
- my (%stats) = (CPU => {}, IO => {}, MIX => {});
- my (%map) = ("CPU intensive" => 'CPU',
- "IO intensive" => 'IO',
- "Alternating IO/CPU" => 'MIX');
- my (%rmap) = reverse %map;
- my ($ticks);
- local ($_);
- foreach (@output) {
- $ticks = $1 if /Timer: (\d+) ticks/;
- my ($thread, $pri) = /^([A-Za-z\/ ]+): (\d+)$/ or next;
- my ($t) = $map{$thread} or next;
-
- my ($s) = $stats{$t};
- $$s{N}++;
- $$s{SUM} += $pri;
- $$s{SUM2} += $pri * $pri;
- $$s{MIN} = $pri if !defined ($$s{MIN}) || $pri < $$s{MIN};
- $$s{MAX} = $pri if !defined ($$s{MAX}) || $pri > $$s{MAX};
- }
-
- my (%expect_n) = (CPU => 5000, IO => 1000, MIX => 12000);
- for my $cat (values (%map)) {
- my ($s) = $stats{$cat};
- die "$rmap{$cat} printed $$s{N} times, not $expect_n{$cat}\n"
- if $$s{N} != $expect_n{$cat};
- die "$rmap{$cat} priority dropped to $$s{MIN}, below PRI_MIN (0)\n"
- if $$s{MIN} < 0;
- die "$rmap{$cat} priority rose to $$s{MAX}, above PRI_MAX (59)\n"
- if $$s{MAX} > 59;
- $$s{MEAN} = $$s{SUM} / $$s{N};
- }
-
- return (\%stats, $ticks);
-}