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 use strict;
  41
  42 my %start;
  43 my %end;
  44 my %type;
  45 my $done = 0;
  46 my $maxtime = 0;
  47 my $firsttime = 99999;
  48 my $count = 0;
  49 my %pids;
  50 my %pidctr;
  51
  52 while (<>) {
  53         my $line = $_;
  54         if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z0-9\_\.]+)\+/) {
  55                 my $func = $2;
  56                 if ($done == 0) {
  57                         $start{$func} = $1;
  58                         $type{$func} = 0;
  59                         if ($1 < $firsttime) {
  60                                 $firsttime = $1;
  61                         }
  62                 }
  63                 if ($line =~ /\@ ([0-9]+)/) {
  64                         $pids{$func} = $1;
  65                 }
  66                 $count = $count + 1;
  67         }
  68
  69         if ($line =~ /([0-9\.]+)\] async_waiting @ ([0-9]+)/) {
  70                 my $pid = $2;
  71                 my $func;
  72                 if (!defined($pidctr{$pid})) {
  73                         $func = "wait_" . $pid . "_1";
  74                         $pidctr{$pid} = 1;
  75                 } else {
  76                         $pidctr{$pid} = $pidctr{$pid} + 1;
  77                         $func = "wait_" . $pid . "_" . $pidctr{$pid};
  78                 }
  79                 if ($done == 0) {
  80                         $start{$func} = $1;
  81                         $type{$func} = 1;
  82                         if ($1 < $firsttime) {
  83                                 $firsttime = $1;
  84                         }
  85                 }
  86                 $pids{$func} = $pid;
  87                 $count = $count + 1;
  88         }
  89
  90         if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
  91                 if ($done == 0) {
  92                         $end{$2} = $1;
  93                         $maxtime = $1;
  94                 }
  95         }
  96
  97         if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
  98                 my $pid = $2;
  99                 my $func =  "wait_" . $pid . "_" . $pidctr{$pid};
 100                 $end{$func} = $1;
 101                 $maxtime = $1;
 102         }
 103         if ($line =~ /Write protecting the/) {
 104                 $done = 1;
 105         }
 106         if ($line =~ /Freeing unused kernel memory/) {
 107                 $done = 1;
 108         }
 109 }
 110
 111 if ($count == 0) {
 112     print STDERR <<END;
 113 No data found in the dmesg. Make sure that 'printk.time=1' and
 114 'initcall_debug' are passed on the kernel command line.
 115 Usage:
 116       dmesg | perl scripts/bootgraph.pl > output.svg
 117 END
 118     exit 1;
 119 }
 120
 121 print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
 122 print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
 123
 124 my @styles;
 125
 126 $styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 127 $styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 128 $styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 129 $styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 130 $styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 131 $styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 132 $styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 133 $styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 134 $styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 135 $styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 136 $styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 137 $styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 138
 139 my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
 140
 141 my $mult = 1950.0 / ($maxtime - $firsttime);
 142 my $threshold2 = ($maxtime - $firsttime) / 120.0;
 143 my $threshold = $threshold2/10;
 144 my $stylecounter = 0;
 145 my %rows;
 146 my $rowscount = 1;
 147 my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
 148
 149 foreach my $key (@initcalls) {
 150         my $duration = $end{$key} - $start{$key};
 151
 152         if ($duration >= $threshold) {
 153                 my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
 154                 my $pid = $pids{$key};
 155
 156                 if (!defined($rows{$pid})) {
 157                         $rows{$pid} = $rowscount;
 158                         $rowscount = $rowscount + 1;
 159                 }
 160                 $s = ($start{$key} - $firsttime) * $mult;
 161                 $s2 = $s + 6;
 162                 $s3 = $s + 1;
 163                 $e = ($end{$key} - $firsttime) * $mult;
 164                 $w = $e - $s;
 165
 166                 $y = $rows{$pid} * 150;
 167                 $y2 = $y + 4;
 168
 169                 $style = $styles[$stylecounter];
 170                 $stylecounter = $stylecounter + 1;
 171                 if ($stylecounter > 11) {
 172                         $stylecounter = 0;
 173                 };
 174
 175                 if ($type{$key} == 1) {
 176                         $y = $y + 15;
 177                         print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
 178                 } else {
 179                         print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
 180                         if ($duration >= $threshold2) {
 181                                 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
 182                         } else {
 183                                 print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text>\n";
 184                         }
 185                 }
 186         }
 187 }
 188
 189
 190 # print the time line on top
 191 my $time = $firsttime;
 192 my $step = ($maxtime - $firsttime) / 15;
 193 while ($time < $maxtime) {
 194         my $s3 = ($time - $firsttime) * $mult;
 195         my $tm = int($time * 100) / 100.0;
 196         print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
 197         $time = $time + $step;
 198 }
 199
 200 print "</svg>\n";