scripts/bootgraph.pl

   1 #!/usr/bin/perl
   2
   3 # Copyright 2008, Intel Corporation
   4 #
   5 # This file is part of the Linux kernel
   6 #
   7 # This program file is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by the
   9 # Free Software Foundation; version 2 of the License.
  10 #
  11 # This program is distributed in the hope that it will be useful, but WITHOUT
  12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 # for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program in a file named COPYING; if not, write to the
  18 # Free Software Foundation, Inc.,
  19 # 51 Franklin Street, Fifth Floor,
  20 # Boston, MA 02110-1301 USA
  21 #
  22 # Authors:
  23 #       Arjan van de Ven <arjan@linux.intel.com>
  24
  25
  26 #
  27 # This script turns a dmesg output into a SVG graphic that shows which
  28 # functions take how much time. You can view SVG graphics with various
  29 # programs, including Inkscape, The Gimp and Firefox.
  30 #
  31 #
  32 # For this script to work, the kernel needs to be compiled with the
  33 # CONFIG_PRINTK_TIME configuration option enabled, and with
  34 # "initcall_debug" passed on the kernel command line.
  35 #
  36 # usage:
  37 #       dmesg | perl scripts/bootgraph.pl > output.svg
  38 #
  39
  40 my @rows;
  41 my %start, %end, %row;
  42 my $done = 0;
  43 my $rowcount = 0;
  44 my $maxtime = 0;
  45 my $firsttime = 100;
  46 my $count = 0;
  47 while (<>) {
  48         my $line = $_;
  49         if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z0-9\_]+)\+/) {
  50                 my $func = $2;
  51                 if ($done == 0) {
  52                         $start{$func} = $1;
  53                         if ($1 < $firsttime) {
  54                                 $firsttime = $1;
  55                         }
  56                 }
  57                 $row{$func} = 1;
  58                 if ($line =~ /\@ ([0-9]+)/) {
  59                         my $pid = $1;
  60                         if (!defined($rows[$pid])) {
  61                                 $rowcount = $rowcount + 1;
  62                                 $rows[$pid] = $rowcount;
  63                         }
  64                         $row{$func} = $rows[$pid];
  65                 }
  66                 $count = $count + 1;
  67         }
  68
  69         if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_]+)\+.*returned/) {
  70                 if ($done == 0) {
  71                         $end{$2} = $1;
  72                         $maxtime = $1;
  73                 }
  74         }
  75         if ($line =~ /Write protecting the/) {
  76                 $done = 1;
  77         }
  78         if ($line =~ /Freeing unused kernel memory/) {
  79                 $done = 1;
  80         }
  81 }
  82
  83 if ($count == 0) {
  84         print "No data found in the dmesg. Make sure that 'printk.time=1' and\n";
  85         print "'initcall_debug' are passed on the kernel command line.\n\n";
  86         print "Usage: \n";
  87         print "      dmesg | perl scripts/bootgraph.pl > output.svg\n\n";
  88         exit;
  89 }
  90
  91 print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
  92 print "<svg width=\"1000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
  93
  94 my @styles;
  95
  96 $styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  97 $styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  98 $styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  99 $styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 100 $styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 101 $styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 102 $styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 103 $styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 104 $styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 105 $styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 106 $styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 107 $styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 108
 109 my $mult = 950.0 / ($maxtime - $firsttime);
 110 my $threshold = ($maxtime - $firsttime) / 60.0;
 111 my $stylecounter = 0;
 112 while (($key,$value) = each %start) {
 113         my $duration = $end{$key} - $start{$key};
 114
 115         if ($duration >= $threshold) {
 116                 my $s, $s2, $e, $y;
 117                 $s = ($value - $firsttime) * $mult;
 118                 $s2 = $s + 6;
 119                 $e = ($end{$key} - $firsttime) * $mult;
 120                 $w = $e - $s;
 121
 122                 $y = $row{$key} * 150;
 123                 $y2 = $y + 4;
 124
 125                 $style = $styles[$stylecounter];
 126                 $stylecounter = $stylecounter + 1;
 127                 if ($stylecounter > 11) {
 128                         $stylecounter = 0;
 129                 };
 130
 131                 print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
 132                 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
 133         }
 134 }
 135
 136
 137 # print the time line on top
 138 my $time = $firsttime;
 139 my $step = ($maxtime - $firsttime) / 15;
 140 while ($time < $maxtime) {
 141         my $s2 = ($time - $firsttime) * $mult;
 142         my $tm = int($time * 100) / 100.0;
 143         print "<text transform=\"translate($s2,89) rotate(90)\">$tm</text>\n";
 144         $time = $time + $step;
 145 }
 146
 147 print "</svg>\n";