Diff: scripts/massif_max.pl

Revision:

1:9ebc941037d5

diff -r cdf462088d13 -r 9ebc941037d5 scripts/massif_max.pl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/massif_max.pl	Fri Sep 29 18:41:59 2017 +0100
@@ -0,0 +1,33 @@
+#!/usr/bin/perl
+
+# Parse a massif.out.xxx file and output peak total memory usage
+
+use warnings;
+use strict;
+
+use utf8;
+use open qw(:std utf8);
+
+die unless @ARGV == 1;
+
+my @snaps;
+open my $fh, '<', $ARGV[0] or die;
+{ local $/ = 'snapshot='; @snaps = <$fh>; }
+close $fh or die;
+
+my ($max, $max_heap, $max_he, $max_stack) = (0, 0, 0, 0);
+for (@snaps)
+{
+    my ($heap, $heap_extra, $stack) = m{
+        mem_heap_B=(\d+)\n
+        mem_heap_extra_B=(\d+)\n
+        mem_stacks_B=(\d+)
+    }xm;
+    next unless defined $heap;
+    my $total = $heap + $heap_extra + $stack;
+    if( $total > $max ) {
+        ($max, $max_heap, $max_he, $max_stack) = ($total, $heap, $heap_extra, $stack);
+    }
+}
+
+printf "$max (heap $max_heap+$max_he, stack $max_stack)\n";