1#!/usr/bin/perl
2
3# Parse a massif.out.xxx file and output peak total memory usage
4
5use warnings;
6use strict;
7
8use utf8;
9use open qw(:std utf8);
10
11die unless @ARGV == 1;
12
13my @snaps;
14open my $fh, '<', $ARGV[0] or die;
15{ local $/ = 'snapshot='; @snaps = <$fh>; }
16close $fh or die;
17
18my ($max, $max_heap, $max_he, $max_stack) = (0, 0, 0, 0);
19for (@snaps)
20{
21    my ($heap, $heap_extra, $stack) = m{
22        mem_heap_B=(\d+)\n
23        mem_heap_extra_B=(\d+)\n
24        mem_stacks_B=(\d+)
25    }xm;
26    next unless defined $heap;
27    my $total = $heap + $heap_extra + $stack;
28    if( $total > $max ) {
29        ($max, $max_heap, $max_he, $max_stack) = ($total, $heap, $heap_extra, $stack);
30    }
31}
32
33printf "$max (heap $max_heap+$max_he, stack $max_stack)\n";
34