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 <[email protected]> 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 $done = 0; 45my $maxtime = 0; 46my $firsttime = 100; 47my $count = 0; 48my %pids; 49 50while (<>) { 51 my $line = $_; 52 if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_]+)\+/) { 53 my $func = $2; 54 if ($done == 0) { 55 $start{$func} = $1; 56 if ($1 < $firsttime) { 57 $firsttime = $1; 58 } 59 } 60 if ($line =~ /\@ ([0-9]+)/) { 61 $pids{$func} = $1; 62 } 63 $count = $count + 1; 64 } 65 66 if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_]+)\+.*returned/) { 67 if ($done == 0) { 68 $end{$2} = $1; 69 $maxtime = $1; 70 } 71 } 72 if ($line =~ /Write protecting the/) { 73 $done = 1; 74 } 75 if ($line =~ /Freeing unused kernel memory/) { 76 $done = 1; 77 } 78} 79 80if ($count == 0) { 81 print STDERR <<END; 82No data found in the dmesg. Make sure that 'printk.time=1' and 83'initcall_debug' are passed on the kernel command line. 84Usage: 85 dmesg | perl scripts/bootgraph.pl > output.svg 86END 87 exit 1; 88} 89 90print "<?xml version=\"1.0\" standalone=\"no\"?> \n"; 91print "<svg width=\"1000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n"; 92 93my @styles; 94 95$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 96$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 97$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 98$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 99$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 100$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 101$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 102$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 103$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 104$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 105$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 106$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 107 108my $mult = 950.0 / ($maxtime - $firsttime); 109my $threshold = ($maxtime - $firsttime) / 60.0; 110my $stylecounter = 0; 111my %rows; 112my $rowscount = 1; 113my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start); 114 115foreach my $key (@initcalls) { 116 my $duration = $end{$key} - $start{$key}; 117 118 if ($duration >= $threshold) { 119 my ($s, $s2, $e, $w, $y, $y2, $style); 120 my $pid = $pids{$key}; 121 122 if (!defined($rows{$pid})) { 123 $rows{$pid} = $rowscount; 124 $rowscount = $rowscount + 1; 125 } 126 $s = ($start{$key} - $firsttime) * $mult; 127 $s2 = $s + 6; 128 $e = ($end{$key} - $firsttime) * $mult; 129 $w = $e - $s; 130 131 $y = $rows{$pid} * 150; 132 $y2 = $y + 4; 133 134 $style = $styles[$stylecounter]; 135 $stylecounter = $stylecounter + 1; 136 if ($stylecounter > 11) { 137 $stylecounter = 0; 138 }; 139 140 print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n"; 141 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n"; 142 } 143} 144 145 146# print the time line on top 147my $time = $firsttime; 148my $step = ($maxtime - $firsttime) / 15; 149while ($time < $maxtime) { 150 my $s3 = ($time - $firsttime) * $mult; 151 my $tm = int($time * 100) / 100.0; 152 print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n"; 153 $time = $time + $step; 154} 155 156print "</svg>\n"; 157