scripts/bootgraph.pl

   1 #!/usr/bin/env 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 use Getopt::Long;
  42 my $header = 0;
  43
  44 sub help {
  45         my $text = << "EOM";
  46 Usage:
  47 1) dmesg | perl scripts/bootgraph.pl [OPTION] > output.svg
  48 2) perl scripts/bootgraph.pl -h
  49
  50 Options:
  51         -header Insert kernel version and date
  52 EOM
  53         my $std=shift;
  54         if ($std == 1) {
  55                 print STDERR $text;
  56         } else {
  57                 print $text;
  58         }
  59         exit;
  60 }
  61
  62 GetOptions(
  63         'h|help'        =>\&help,
  64         'header'        =>\$header
  65 );
  66
  67 my %start;
  68 my %end;
  69 my %type;
  70 my $done = 0;
  71 my $maxtime = 0;
  72 my $firsttime = 99999;
  73 my $count = 0;
  74 my %pids;
  75 my %pidctr;
  76
  77 my $headerstep = 20;
  78 my $xheader = 15;
  79 my $yheader = 25;
  80 my $cyheader = 0;
  81
  82 while (<>) {
  83         my $line = $_;
  84         if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z0-9\_\.]+)\+/) {
  85                 my $func = $2;
  86                 if ($done == 0) {
  87                         $start{$func} = $1;
  88                         $type{$func} = 0;
  89                         if ($1 < $firsttime) {
  90                                 $firsttime = $1;
  91                         }
  92                 }
  93                 if ($line =~ /\@ ([0-9]+)/) {
  94                         $pids{$func} = $1;
  95                 }
  96                 $count = $count + 1;
  97         }
  98
  99         if ($line =~ /([0-9\.]+)\] async_waiting @ ([0-9]+)/) {
 100                 my $pid = $2;
 101                 my $func;
 102                 if (!defined($pidctr{$pid})) {
 103                         $func = "wait_" . $pid . "_1";
 104                         $pidctr{$pid} = 1;
 105                 } else {
 106                         $pidctr{$pid} = $pidctr{$pid} + 1;
 107                         $func = "wait_" . $pid . "_" . $pidctr{$pid};
 108                 }
 109                 if ($done == 0) {
 110                         $start{$func} = $1;
 111                         $type{$func} = 1;
 112                         if ($1 < $firsttime) {
 113                                 $firsttime = $1;
 114                         }
 115                 }
 116                 $pids{$func} = $pid;
 117                 $count = $count + 1;
 118         }
 119
 120         if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
 121                 if ($done == 0) {
 122                         $end{$2} = $1;
 123                         $maxtime = $1;
 124                 }
 125         }
 126
 127         if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
 128                 my $pid = $2;
 129                 my $func =  "wait_" . $pid . "_" . $pidctr{$pid};
 130                 $end{$func} = $1;
 131                 $maxtime = $1;
 132         }
 133         if ($line =~ /Write protecting the/) {
 134                 $done = 1;
 135         }
 136         if ($line =~ /Freeing unused kernel memory/) {
 137                 $done = 1;
 138         }
 139 }
 140
 141 if ($count == 0) {
 142     print STDERR <<END;
 143 No data found in the dmesg. Make sure that 'printk.time=1' and
 144 'initcall_debug' are passed on the kernel command line.
 145 END
 146         help(1);
 147     exit 1;
 148 }
 149
 150 print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
 151 print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
 152
 153
 154 if ($header) {
 155         my $version = `uname -a`;
 156         my $date = `date`;
 157         print "<text transform=\"translate($xheader,$yheader)\">Kernel version: $version</text>\n";
 158         $cyheader = $yheader+$headerstep;
 159         print "<text transform=\"translate($xheader,$cyheader)\">Date: $date</text>\n";
 160 }
 161
 162 my @styles;
 163
 164 $styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 165 $styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 166 $styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 167 $styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 168 $styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 169 $styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 170 $styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 171 $styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 172 $styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 173 $styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 174 $styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 175 $styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 176
 177 my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
 178
 179 my $mult = 1950.0 / ($maxtime - $firsttime);
 180 my $threshold2 = ($maxtime - $firsttime) / 120.0;
 181 my $threshold = $threshold2/10;
 182 my $stylecounter = 0;
 183 my %rows;
 184 my $rowscount = 1;
 185 my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
 186
 187 foreach my $key (@initcalls) {
 188         my $duration = $end{$key} - $start{$key};
 189
 190         if ($duration >= $threshold) {
 191                 my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
 192                 my $pid = $pids{$key};
 193
 194                 if (!defined($rows{$pid})) {
 195                         $rows{$pid} = $rowscount;
 196                         $rowscount = $rowscount + 1;
 197                 }
 198                 $s = ($start{$key} - $firsttime) * $mult;
 199                 $s2 = $s + 6;
 200                 $s3 = $s + 1;
 201                 $e = ($end{$key} - $firsttime) * $mult;
 202                 $w = $e - $s;
 203
 204                 $y = $rows{$pid} * 150;
 205                 $y2 = $y + 4;
 206
 207                 $style = $styles[$stylecounter];
 208                 $stylecounter = $stylecounter + 1;
 209                 if ($stylecounter > 11) {
 210                         $stylecounter = 0;
 211                 };
 212
 213                 if ($type{$key} == 1) {
 214                         $y = $y + 15;
 215                         print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
 216                 } else {
 217                         print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
 218                         if ($duration >= $threshold2) {
 219                                 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
 220                         } else {
 221                                 print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text>\n";
 222                         }
 223                 }
 224         }
 225 }
 226
 227
 228 # print the time line on top
 229 my $time = $firsttime;
 230 my $step = ($maxtime - $firsttime) / 15;
 231 while ($time < $maxtime) {
 232         my $s3 = ($time - $firsttime) * $mult;
 233         my $tm = int($time * 100) / 100.0;
 234         print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
 235         $time = $time + $step;
 236 }
 237
 238 print "</svg>\n";