2020-02-27 19:23:58 +08:00
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#!/usr/bin/env perl
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2019-05-01 00:27:23 +08:00
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# Parse a massif.out.xxx file and output peak total memory usage
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use warnings;
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use strict;
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use utf8;
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use open qw(:std utf8);
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die unless @ARGV == 1;
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my @snaps;
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open my $fh, '<', $ARGV[0] or die;
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{ local $/ = 'snapshot='; @snaps = <$fh>; }
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close $fh or die;
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my ($max, $max_heap, $max_he, $max_stack) = (0, 0, 0, 0);
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for (@snaps)
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{
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my ($heap, $heap_extra, $stack) = m{
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mem_heap_B=(\d+)\n
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mem_heap_extra_B=(\d+)\n
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mem_stacks_B=(\d+)
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}xm;
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next unless defined $heap;
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my $total = $heap + $heap_extra + $stack;
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if( $total > $max ) {
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($max, $max_heap, $max_he, $max_stack) = ($total, $heap, $heap_extra, $stack);
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}
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}
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printf "$max (heap $max_heap+$max_he, stack $max_stack)\n";
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