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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
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40use strict;
41
42my %start;
43my %end;
d3f8ddea 44my %type;
aa5d9151 45my $done = 0;
aa5d9151 46my $maxtime = 0;
c443453c 47my $firsttime = 99999;
aa5d9151 48my $count = 0;
ddc7a01a 49my %pids;
d3f8ddea 50my %pidctr;
ddc7a01a 51
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52while (<>) {
53 my $line = $_;
0bb98e23 54 if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_\.]+)\+/) {
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55 my $func = $2;
56 if ($done == 0) {
57 $start{$func} = $1;
d3f8ddea 58 $type{$func} = 0;
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59 if ($1 < $firsttime) {
60 $firsttime = $1;
61 }
aa5d9151 62 }
aa5d9151 63 if ($line =~ /\@ ([0-9]+)/) {
ddc7a01a 64 $pids{$func} = $1;
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65 }
66 $count = $count + 1;
67 }
68
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69 if ($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 = $count + 1;
88 }
89
0bb98e23 90 if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
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91 if ($done == 0) {
92 $end{$2} = $1;
93 $maxtime = $1;
94 }
95 }
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96
97 if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
98 my $pid = $2;
99 my $func = "wait_" . $pid . "_" . $pidctr{$pid};
100 $end{$func} = $1;
101 $maxtime = $1;
102 }
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103 if ($line =~ /Write protecting the/) {
104 $done = 1;
105 }
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106 if ($line =~ /Freeing unused kernel memory/) {
107 $done = 1;
108 }
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109}
110
111if ($count == 0) {
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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;
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119}
120
121print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
40c8c85a 122print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
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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
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139my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
140
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141my $mult = 1950.0 / ($maxtime - $firsttime);
142my $threshold2 = ($maxtime - $firsttime) / 120.0;
143my $threshold = $threshold2/10;
aa5d9151 144my $stylecounter = 0;
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145my %rows;
146my $rowscount = 1;
06d1cd26 147my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
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148
149foreach my $key (@initcalls) {
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150 my $duration = $end{$key} - $start{$key};
151
152 if ($duration >= $threshold) {
40c8c85a 153 my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
2a813f8c 154 my $pid = $pids{$key};
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155
156 if (!defined($rows{$pid})) {
157 $rows{$pid} = $rowscount;
158 $rowscount = $rowscount + 1;
159 }
06d1cd26 160 $s = ($start{$key} - $firsttime) * $mult;
aa5d9151 161 $s2 = $s + 6;
40c8c85a 162 $s3 = $s + 1;
80a398a5 163 $e = ($end{$key} - $firsttime) * $mult;
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164 $w = $e - $s;
165
ddc7a01a 166 $y = $rows{$pid} * 150;
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167 $y2 = $y + 4;
168
169 $style = $styles[$stylecounter];
170 $stylecounter = $stylecounter + 1;
171 if ($stylecounter > 11) {
172 $stylecounter = 0;
173 };
174
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175 if ($type{$key} == 1) {
176 $y = $y + 15;
177 print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
40c8c85a 178 } else {
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179 print "<rect x=\"$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 }
40c8c85a 185 }
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186 }
187}
188
189
190# print the time line on top
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191my $time = $firsttime;
192my $step = ($maxtime - $firsttime) / 15;
aa5d9151 193while ($time < $maxtime) {
2a813f8c 194 my $s3 = ($time - $firsttime) * $mult;
80a398a5 195 my $tm = int($time * 100) / 100.0;
2a813f8c 196 print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
80a398a5 197 $time = $time + $step;
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198}
199
200print "</svg>\n";