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Arjan van de Venaa5d9152008-09-13 09:36:06 -07001#!/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
Frederic Weisbeckerddc7a012008-10-04 21:35:48 +020040my %start, %end;
Arjan van de Venaa5d9152008-09-13 09:36:06 -070041my $done = 0;
Arjan van de Venaa5d9152008-09-13 09:36:06 -070042my $maxtime = 0;
Arjan van de Ven80a398a2008-09-14 15:30:52 -070043my $firsttime = 100;
Arjan van de Venaa5d9152008-09-13 09:36:06 -070044my $count = 0;
Frederic Weisbeckerddc7a012008-10-04 21:35:48 +020045my %pids;
46
Arjan van de Venaa5d9152008-09-13 09:36:06 -070047while (<>) {
48 my $line = $_;
49 if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z\_]+)\+/) {
50 my $func = $2;
51 if ($done == 0) {
52 $start{$func} = $1;
Arjan van de Ven80a398a2008-09-14 15:30:52 -070053 if ($1 < $firsttime) {
54 $firsttime = $1;
55 }
Arjan van de Venaa5d9152008-09-13 09:36:06 -070056 }
Arjan van de Venaa5d9152008-09-13 09:36:06 -070057 if ($line =~ /\@ ([0-9]+)/) {
Frederic Weisbeckerddc7a012008-10-04 21:35:48 +020058 $pids{$func} = $1;
Arjan van de Venaa5d9152008-09-13 09:36:06 -070059 }
60 $count = $count + 1;
61 }
62
63 if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z\_]+)\+.*returned/) {
64 if ($done == 0) {
65 $end{$2} = $1;
66 $maxtime = $1;
67 }
68 }
69 if ($line =~ /Write protecting the/) {
70 $done = 1;
71 }
Arjan van de Ven80a398a2008-09-14 15:30:52 -070072 if ($line =~ /Freeing unused kernel memory/) {
73 $done = 1;
74 }
Arjan van de Venaa5d9152008-09-13 09:36:06 -070075}
76
77if ($count == 0) {
78 print "No data found in the dmesg. Make sure CONFIG_PRINTK_TIME is enabled and\n";
79 print "that initcall_debug is 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
Arjan van de Ven80a398a2008-09-14 15:30:52 -0700103my $mult = 950.0 / ($maxtime - $firsttime);
104my $threshold = ($maxtime - $firsttime) / 60.0;
Arjan van de Venaa5d9152008-09-13 09:36:06 -0700105my $stylecounter = 0;
Frederic Weisbeckerddc7a012008-10-04 21:35:48 +0200106my %rows;
107my $rowscount = 1;
Arjan van de Venaa5d9152008-09-13 09:36:06 -0700108while (($key,$value) = each %start) {
109 my $duration = $end{$key} - $start{$key};
110
111 if ($duration >= $threshold) {
112 my $s, $s2, $e, $y;
Frederic Weisbeckerddc7a012008-10-04 21:35:48 +0200113 $s = ($value - $firsttime) * $mult;
Arjan van de Venaa5d9152008-09-13 09:36:06 -0700114 $s2 = $s + 6;
Arjan van de Ven80a398a2008-09-14 15:30:52 -0700115 $e = ($end{$key} - $firsttime) * $mult;
Arjan van de Venaa5d9152008-09-13 09:36:06 -0700116 $w = $e - $s;
117
Frederic Weisbeckerddc7a012008-10-04 21:35:48 +0200118 $y = $rows{$pid} * 150;
Arjan van de Venaa5d9152008-09-13 09:36:06 -0700119 $y2 = $y + 4;
120
121 $style = $styles[$stylecounter];
122 $stylecounter = $stylecounter + 1;
123 if ($stylecounter > 11) {
124 $stylecounter = 0;
125 };
126
127 print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
128 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
129 }
130}
131
132
133# print the time line on top
Arjan van de Ven80a398a2008-09-14 15:30:52 -0700134my $time = $firsttime;
135my $step = ($maxtime - $firsttime) / 15;
Arjan van de Venaa5d9152008-09-13 09:36:06 -0700136while ($time < $maxtime) {
Arjan van de Ven80a398a2008-09-14 15:30:52 -0700137 my $s2 = ($time - $firsttime) * $mult;
138 my $tm = int($time * 100) / 100.0;
139 print "<text transform=\"translate($s2,89) rotate(90)\">$tm</text>\n";
140 $time = $time + $step;
Arjan van de Venaa5d9152008-09-13 09:36:06 -0700141}
142
143print "</svg>\n";