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 40my %start, %end; 41my $done = 0; 42my $maxtime = 0; 43my $firsttime = 100; 44my $count = 0; 45my %pids; 46 47while (<>) { 48 my $line = $_; 49 if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_]+)\+/) { 50 my $func = $2; 51 if ($done == 0) { 52 $start{$func} = $1; 53 if ($1 < $firsttime) { 54 $firsttime = $1; 55 } 56 } 57 if ($line =~ /\@ ([0-9]+)/) { 58 $pids{$func} = $1; 59 } 60 $count = $count + 1; 61 } 62 63 if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_]+)\+.*returned/) { 64 if ($done == 0) { 65 $end{$2} = $1; 66 $maxtime = $1; 67 } 68 } 69 if ($line =~ /Write protecting the/) { 70 $done = 1; 71 } 72 if ($line =~ /Freeing unused kernel memory/) { 73 $done = 1; 74 } 75} 76 77if ($count == 0) { 78 print "No data found in the dmesg. Make sure that 'printk.time=1' and\n"; 79 print "'initcall_debug' are passed on the kernel command line.\n\n"; 80 print "Usage: \n"; 81 print " dmesg | perl scripts/bootgraph.pl > output.svg\n\n"; 82 exit; 83} 84 85print "<?xml version=\"1.0\" standalone=\"no\"?> \n"; 86print "<svg width=\"1000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n"; 87 88my @styles; 89 90$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 91$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 92$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 93$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 94$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 95$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 96$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 97$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 98$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 99$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 100$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 101$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 102 103my $mult = 950.0 / ($maxtime - $firsttime); 104my $threshold = ($maxtime - $firsttime) / 60.0; 105my $stylecounter = 0; 106my %rows; 107my $rowscount = 1; 108while (($key,$value) = each %start) { 109 my $duration = $end{$key} - $start{$key}; 110 111 if ($duration >= $threshold) { 112 my $s, $s2, $e, $y; 113 $pid = $pids{$key}; 114 115 if (!defined($rows{$pid})) { 116 $rows{$pid} = $rowscount; 117 $rowscount = $rowscount + 1; 118 } 119 $s = ($value - $firsttime) * $mult; 120 $s2 = $s + 6; 121 $e = ($end{$key} - $firsttime) * $mult; 122 $w = $e - $s; 123 124 $y = $rows{$pid} * 150; 125 $y2 = $y + 4; 126 127 $style = $styles[$stylecounter]; 128 $stylecounter = $stylecounter + 1; 129 if ($stylecounter > 11) { 130 $stylecounter = 0; 131 }; 132 133 print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n"; 134 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n"; 135 } 136} 137 138 139# print the time line on top 140my $time = $firsttime; 141my $step = ($maxtime - $firsttime) / 15; 142while ($time < $maxtime) { 143 my $s2 = ($time - $firsttime) * $mult; 144 my $tm = int($time * 100) / 100.0; 145 print "<text transform=\"translate($s2,89) rotate(90)\">$tm</text>\n"; 146 $time = $time + $step; 147} 148 149print "</svg>\n"; 150