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 = 100; 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