scripts/bootgraph.pl

   1 #!/usr/bin/env perl
   2 # SPDX-License-Identifier: GPL-2.0-only
   3
   4 # Copyright 2008, Intel Corporation
   5 #
   6 # This file is part of the Linux kernel
   7 #
   8 # Authors:
   9 #       Arjan van de Ven <arjan@linux.intel.com>
  10
  11
  12 #
  13 # This script turns a dmesg output into a SVG graphic that shows which
  14 # functions take how much time. You can view SVG graphics with various
  15 # programs, including Inkscape, The Gimp and Firefox.
  16 #
  17 #
  18 # For this script to work, the kernel needs to be compiled with the
  19 # CONFIG_PRINTK_TIME configuration option enabled, and with
  20 # "initcall_debug" passed on the kernel command line.
  21 #
  22 # usage:
  23 #       dmesg | perl scripts/bootgraph.pl > output.svg
  24 #
  25
  26 use strict;
  27 use Getopt::Long;
  28 my $header = 0;
  29
  30 sub help {
  31         my $text = << "EOM";
  32 Usage:
  33 1) dmesg | perl scripts/bootgraph.pl [OPTION] > output.svg
  34 2) perl scripts/bootgraph.pl -h
  35
  36 Options:
  37         -header Insert kernel version and date
  38 EOM
  39         my $std=shift;
  40         if ($std == 1) {
  41                 print STDERR $text;
  42         } else {
  43                 print $text;
  44         }
  45         exit;
  46 }
  47
  48 GetOptions(
  49         'h|help'        =>\&help,
  50         'header'        =>\$header
  51 );
  52
  53 my %start;
  54 my %end;
  55 my %type;
  56 my $done = 0;
  57 my $maxtime = 0;
  58 my $firsttime = 99999;
  59 my $count = 0;
  60 my %pids;
  61 my %pidctr;
  62
  63 my $headerstep = 20;
  64 my $xheader = 15;
  65 my $yheader = 25;
  66 my $cyheader = 0;
  67
  68 while (<>) {
  69         my $line = $_;
  70         if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z0-9\_\.]+)\+/) {
  71                 my $func = $2;
  72                 if ($done == 0) {
  73                         $start{$func} = $1;
  74                         $type{$func} = 0;
  75                         if ($1 < $firsttime) {
  76                                 $firsttime = $1;
  77                         }
  78                 }
  79                 if ($line =~ /\@ ([0-9]+)/) {
  80                         $pids{$func} = $1;
  81                 }
  82                 $count = $count + 1;
  83         }
  84
  85         if ($line =~ /([0-9\.]+)\] async_waiting @ ([0-9]+)/) {
  86                 my $pid = $2;
  87                 my $func;
  88                 if (!defined($pidctr{$pid})) {
  89                         $func = "wait_" . $pid . "_1";
  90                         $pidctr{$pid} = 1;
  91                 } else {
  92                         $pidctr{$pid} = $pidctr{$pid} + 1;
  93                         $func = "wait_" . $pid . "_" . $pidctr{$pid};
  94                 }
  95                 if ($done == 0) {
  96                         $start{$func} = $1;
  97                         $type{$func} = 1;
  98                         if ($1 < $firsttime) {
  99                                 $firsttime = $1;
 100                         }
 101                 }
 102                 $pids{$func} = $pid;
 103                 $count = $count + 1;
 104         }
 105
 106         if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
 107                 if ($done == 0) {
 108                         $end{$2} = $1;
 109                         $maxtime = $1;
 110                 }
 111         }
 112
 113         if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
 114                 my $pid = $2;
 115                 my $func =  "wait_" . $pid . "_" . $pidctr{$pid};
 116                 $end{$func} = $1;
 117                 $maxtime = $1;
 118         }
 119         if ($line =~ /Write protecting the/) {
 120                 $done = 1;
 121         }
 122         if ($line =~ /Freeing unused kernel memory/) {
 123                 $done = 1;
 124         }
 125 }
 126
 127 if ($count == 0) {
 128     print STDERR <<END;
 129 No data found in the dmesg. Make sure that 'printk.time=1' and
 130 'initcall_debug' are passed on the kernel command line.
 131 END
 132         help(1);
 133     exit 1;
 134 }
 135
 136 print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
 137 print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
 138
 139
 140 if ($header) {
 141         my $version = `uname -a`;
 142         my $date = `date`;
 143         print "<text transform=\"translate($xheader,$yheader)\">Kernel version: $version</text>\n";
 144         $cyheader = $yheader+$headerstep;
 145         print "<text transform=\"translate($xheader,$cyheader)\">Date: $date</text>\n";
 146 }
 147
 148 my @styles;
 149
 150 $styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 151 $styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 152 $styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 153 $styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 154 $styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 155 $styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 156 $styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 157 $styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 158 $styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 159 $styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 160 $styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 161 $styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 162
 163 my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
 164
 165 my $mult = 1950.0 / ($maxtime - $firsttime);
 166 my $threshold2 = ($maxtime - $firsttime) / 120.0;
 167 my $threshold = $threshold2/10;
 168 my $stylecounter = 0;
 169 my %rows;
 170 my $rowscount = 1;
 171 my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
 172
 173 foreach my $key (@initcalls) {
 174         my $duration = $end{$key} - $start{$key};
 175
 176         if ($duration >= $threshold) {
 177                 my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
 178                 my $pid = $pids{$key};
 179
 180                 if (!defined($rows{$pid})) {
 181                         $rows{$pid} = $rowscount;
 182                         $rowscount = $rowscount + 1;
 183                 }
 184                 $s = ($start{$key} - $firsttime) * $mult;
 185                 $s2 = $s + 6;
 186                 $s3 = $s + 1;
 187                 $e = ($end{$key} - $firsttime) * $mult;
 188                 $w = $e - $s;
 189
 190                 $y = $rows{$pid} * 150;
 191                 $y2 = $y + 4;
 192
 193                 $style = $styles[$stylecounter];
 194                 $stylecounter = $stylecounter + 1;
 195                 if ($stylecounter > 11) {
 196                         $stylecounter = 0;
 197                 };
 198
 199                 if ($type{$key} == 1) {
 200                         $y = $y + 15;
 201                         print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
 202                 } else {
 203                         print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
 204                         if ($duration >= $threshold2) {
 205                                 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
 206                         } else {
 207                                 print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text>\n";
 208                         }
 209                 }
 210         }
 211 }
 212
 213
 214 # print the time line on top
 215 my $time = $firsttime;
 216 my $step = ($maxtime - $firsttime) / 15;
 217 while ($time < $maxtime) {
 218         my $s3 = ($time - $firsttime) * $mult;
 219         my $tm = int($time * 100) / 100.0;
 220         print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
 221         $time = $time + $step;
 222 }
 223
 224 print "</svg>\n";