linux/scripts/bootgraph.pl
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   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
  40use strict;
  41
  42my %start;
  43my %end;
  44my %type;
  45my $done = 0;
  46my $maxtime = 0;
  47my $firsttime = 99999;
  48my $count = 0;
  49my %pids;
  50my %pidctr;
  51
  52while (<>) {
  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                $done = 1;
 108        }
 109}
 110
 111if ($count == 0) {
 112    print STDERR <<END;
 113No data found in the dmesg. Make sure that 'printk.time=1' and
 114'initcall_debug' are passed on the kernel command line.
 115Usage:
 116      dmesg | perl scripts/bootgraph.pl > output.svg
 117END
 118    exit 1;
 119}
 120
 121print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
 122print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
 123
 124my @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
 139my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
 140
 141my $mult = 1950.0 / ($maxtime - $firsttime);
 142my $threshold2 = ($maxtime - $firsttime) / 120.0;
 143my $threshold = $threshold2/10;
 144my $stylecounter = 0;
 145my %rows;
 146my $rowscount = 1;
 147my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
 148
 149foreach 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
 191my $time = $firsttime;
 192my $step = ($maxtime - $firsttime) / 15;
 193while ($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
 200print "</svg>\n";
 201
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