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 $count = 0;
  46 while (<>) {
  47         my $line = $_;
  48         if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z\_]+)\+/) {
  49                 my $func = $2;
  50                 if ($done == 0) {
  51                         $start{$func} = $1;
  52                 }
  53                 $row{$func} = 1;
  54                 if ($line =~ /\@ ([0-9]+)/) {
  55                         my $pid = $1;
  56                         if (!defined($rows[$pid])) {
  57                                 $rowcount = $rowcount + 1;
  58                                 $rows[$pid] = $rowcount;
  59                         }
  60                         $row{$func} = $rows[$pid];
  61                 }
  62                 $count = $count + 1;
  63         }
  64
  65         if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z\_]+)\+.*returned/) {
  66                 if ($done == 0) {
  67                         $end{$2} = $1;
  68                         $maxtime = $1;
  69                 }
  70         }
  71         if ($line =~ /Write protecting the/) {
  72                 $done = 1;
  73         }
  74 }
  75
  76 if ($count == 0) {
  77         print "No data found in the dmesg. Make sure CONFIG_PRINTK_TIME is enabled and\n";
  78         print "that initcall_debug is passed on the kernel command line.\n\n";
  79         print "Usage: \n";
  80         print "      dmesg | perl scripts/bootgraph.pl > output.svg\n\n";
  81         exit;
  82 }
  83
  84 print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
  85 print "<svg width=\"1000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
  86
  87 my @styles;
  88
  89 $styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  90 $styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  91 $styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  92 $styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  93 $styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  94 $styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  95 $styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  96 $styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  97 $styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  98 $styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  99 $styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 100 $styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 101
 102 my $mult = 950.0 / $maxtime;
 103 my $threshold = 0.0500 / $maxtime;
 104 my $stylecounter = 0;
 105 while (($key,$value) = each %start) {
 106         my $duration = $end{$key} - $start{$key};
 107
 108         if ($duration >= $threshold) {
 109                 my $s, $s2, $e, $y;
 110                 $s = $value * $mult;
 111                 $s2 = $s + 6;
 112                 $e = $end{$key} * $mult;
 113                 $w = $e - $s;
 114
 115                 $y = $row{$key} * 150;
 116                 $y2 = $y + 4;
 117
 118                 $style = $styles[$stylecounter];
 119                 $stylecounter = $stylecounter + 1;
 120                 if ($stylecounter > 11) {
 121                         $stylecounter = 0;
 122                 };
 123
 124                 print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
 125                 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
 126         }
 127 }
 128
 129
 130 # print the time line on top
 131 my $time = 0.0;
 132 while ($time < $maxtime) {
 133         my $s2 = $time * $mult;
 134         print "<text transform=\"translate($s2,89) rotate(90)\">$time</text>\n";
 135         $time = $time + 0.1;
 136 }
 137
 138 print "</svg>\n";