LXR linux/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
  40use strict;
  41use Getopt::Long;
  42my $header = 0;
  43
  44sub help {
  45        my $text = << "EOM";
  46Usage:
  471) dmesg | perl scripts/bootgraph.pl [OPTION] > output.svg
  482) perl scripts/bootgraph.pl -h
  49
  50Options:
  51        -header Insert kernel version and date
  52EOM
  53        my $std=shift;
  54        if ($std == 1) {
  55                print STDERR $text;
  56        } else {
  57                print $text;
  58        }
  59        exit;
  60}
  61
  62GetOptions(
  63        'h|help'        =>\&help,
  64        'header'        =>\$header
  65);
  66
  67my %start;
  68my %end;
  69my %type;
  70my $done = 0;
  71my $maxtime = 0;
  72my $firsttime = 99999;
  73my $count = 0;
  74my %pids;
  75my %pidctr;
  76
  77my $headerstep = 20;
  78my $xheader = 15;
  79my $yheader = 25;
  80my $cyheader = 0;
  81
  82while (<>) {
  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                $done = 1;
 138        }
 139}
 140
 141if ($count == 0) {
 142    print STDERR <<END;
 143No data found in the dmesg. Make sure that 'printk.time=1' and
 144'initcall_debug' are passed on the kernel command line.
 145END
 146        help(1);
 147    exit 1;
 148}
 149
 150print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
 151print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
 152
 153
 154if ($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: $date</text>\n";
 160}
 161
 162my @styles;
 163
 164$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
 177my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
 178
 179my $mult = 1950.0 / ($maxtime - $firsttime);
 180my $threshold2 = ($maxtime - $firsttime) / 120.0;
 181my $threshold = $threshold2/10;
 182my $stylecounter = 0;
 183my %rows;
 184my $rowscount = 1;
 185my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
 186
 187foreach 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
 229my $time = $firsttime;
 230my $step = ($maxtime - $firsttime) / 15;
 231while ($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
 238print "</svg>\n";
 239