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 40my @rows; 41my %start, %end, %row; 42my $done = 0; 43my $rowcount = 0; 44my $maxtime = 0; 45my $count = 0; 46while (<>) { 47 my $line = $_; 48 if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z\_]+)\+/) { 49 my $func = $2; 50 if ($done == 0) { 51 $start{$func} = $1; 52 } 53 $row{$func} = 1; 54 if ($line =~ /\@ ([0-9]+)/) { 55 my $pid = $1; 56 if (!defined($rows[$pid])) { 57 $rowcount = $rowcount + 1; 58 $rows[$pid] = $rowcount; 59 } 60 $row{$func} = $rows[$pid]; 61 } 62 $count = $count + 1; 63 } 64 65 if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z\_]+)\+.*returned/) { 66 if ($done == 0) { 67 $end{$2} = $1; 68 $maxtime = $1; 69 } 70 } 71 if ($line =~ /Write protecting the/) { 72 $done = 1; 73 } 74} 75 76if ($count == 0) { 77 print "No data found in the dmesg. Make sure CONFIG_PRINTK_TIME is enabled and\n"; 78 print "that initcall_debug is passed on the kernel command line.\n\n"; 79 print "Usage: \n"; 80 print " dmesg | perl scripts/bootgraph.pl > output.svg\n\n"; 81 exit; 82} 83 84print "<?xml version=\"1.0\" standalone=\"no\"?> \n"; 85print "<svg width=\"1000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n"; 86 87my @styles; 88 89$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 90$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 91$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 92$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 93$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 94$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 95$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 96$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 97$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 98$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 99$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 100$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)"; 101 102my $mult = 950.0 / $maxtime; 103my $threshold = 0.0500 / $maxtime; 104my $stylecounter = 0; 105while (($key,$value) = each %start) { 106 my $duration = $end{$key} - $start{$key}; 107 108 if ($duration >= $threshold) { 109 my $s, $s2, $e, $y; 110 $s = $value * $mult; 111 $s2 = $s + 6; 112 $e = $end{$key} * $mult; 113 $w = $e - $s; 114 115 $y = $row{$key} * 150; 116 $y2 = $y + 4; 117 118 $style = $styles[$stylecounter]; 119 $stylecounter = $stylecounter + 1; 120 if ($stylecounter > 11) { 121 $stylecounter = 0; 122 }; 123 124 print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n"; 125 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n"; 126 } 127} 128 129 130# print the time line on top 131my $time = 0.0; 132while ($time < $maxtime) { 133 my $s2 = $time * $mult; 134 print "<text transform=\"translate($s2,89) rotate(90)\">$time</text>\n"; 135 $time = $time + 0.1; 136} 137 138print "</svg>\n"; 139