Root/scripts/bootgraph.pl

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
40use strict;
41use Getopt::Long;
42my $header = 0;
43
44sub help {
45    my $text = << "EOM";
46Usage:
471) dmesg | perl scripts/bootgraph.pl [OPTION] > output.svg
482) perl scripts/bootgraph.pl -h
49
50Options:
51    -header Insert kernel version and date
52EOM
53    my $std=shift;
54    if ($std == 1) {
55        print STDERR $text;
56    } else {
57        print $text;
58    }
59    exit;
60}
61
62GetOptions(
63    'h|help' =>\&help,
64    'header' =>\$header
65);
66
67my %start;
68my %end;
69my %type;
70my $done = 0;
71my $maxtime = 0;
72my $firsttime = 99999;
73my $count = 0;
74my %pids;
75my %pidctr;
76
77my $headerstep = 20;
78my $xheader = 15;
79my $yheader = 25;
80my $cyheader = 0;
81
82while (<>) {
83    my $line = $_;
84    if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_\.]+)\+/) {
85        my $func = $2;
86        if ($done == 0) {
87            $start{$func} = $1;
88            $type{$func} = 0;
89            if ($1 < $firsttime) {
90                $firsttime = $1;
91            }
92        }
93        if ($line =~ /\@ ([0-9]+)/) {
94            $pids{$func} = $1;
95        }
96        $count = $count + 1;
97    }
98
99    if ($line =~ /([0-9\.]+)\] async_waiting @ ([0-9]+)/) {
100        my $pid = $2;
101        my $func;
102        if (!defined($pidctr{$pid})) {
103            $func = "wait_" . $pid . "_1";
104            $pidctr{$pid} = 1;
105        } else {
106            $pidctr{$pid} = $pidctr{$pid} + 1;
107            $func = "wait_" . $pid . "_" . $pidctr{$pid};
108        }
109        if ($done == 0) {
110            $start{$func} = $1;
111            $type{$func} = 1;
112            if ($1 < $firsttime) {
113                $firsttime = $1;
114            }
115        }
116        $pids{$func} = $pid;
117        $count = $count + 1;
118    }
119
120    if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
121        if ($done == 0) {
122            $end{$2} = $1;
123            $maxtime = $1;
124        }
125    }
126
127    if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
128        my $pid = $2;
129        my $func = "wait_" . $pid . "_" . $pidctr{$pid};
130        $end{$func} = $1;
131        $maxtime = $1;
132    }
133    if ($line =~ /Write protecting the/) {
134        $done = 1;
135    }
136    if ($line =~ /Freeing unused kernel memory/) {
137        $done = 1;
138    }
139}
140
141if ($count == 0) {
142    print STDERR <<END;
143No data found in the dmesg. Make sure that 'printk.time=1' and
144'initcall_debug' are passed on the kernel command line.
145END
146    help(1);
147    exit 1;
148}
149
150print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
151print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
152
153
154if ($header) {
155    my $version = `uname -a`;
156    my $date = `date`;
157    print "<text transform=\"translate($xheader,$yheader)\">Kernel version: $version</text>\n";
158    $cyheader = $yheader+$headerstep;
159    print "<text transform=\"translate($xheader,$cyheader)\">Date: $date</text>\n";
160}
161
162my @styles;
163
164$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
165$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
166$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
167$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
168$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
169$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
170$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
171$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
172$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
173$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
174$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
175$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
176
177my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
178
179my $mult = 1950.0 / ($maxtime - $firsttime);
180my $threshold2 = ($maxtime - $firsttime) / 120.0;
181my $threshold = $threshold2/10;
182my $stylecounter = 0;
183my %rows;
184my $rowscount = 1;
185my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
186
187foreach my $key (@initcalls) {
188    my $duration = $end{$key} - $start{$key};
189
190    if ($duration >= $threshold) {
191        my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
192        my $pid = $pids{$key};
193
194        if (!defined($rows{$pid})) {
195            $rows{$pid} = $rowscount;
196            $rowscount = $rowscount + 1;
197        }
198        $s = ($start{$key} - $firsttime) * $mult;
199        $s2 = $s + 6;
200        $s3 = $s + 1;
201        $e = ($end{$key} - $firsttime) * $mult;
202        $w = $e - $s;
203
204        $y = $rows{$pid} * 150;
205        $y2 = $y + 4;
206
207        $style = $styles[$stylecounter];
208        $stylecounter = $stylecounter + 1;
209        if ($stylecounter > 11) {
210            $stylecounter = 0;
211        };
212
213        if ($type{$key} == 1) {
214            $y = $y + 15;
215            print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
216        } else {
217            print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
218            if ($duration >= $threshold2) {
219                print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
220            } else {
221                print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text>\n";
222            }
223        }
224    }
225}
226
227
228# print the time line on top
229my $time = $firsttime;
230my $step = ($maxtime - $firsttime) / 15;
231while ($time < $maxtime) {
232    my $s3 = ($time - $firsttime) * $mult;
233    my $tm = int($time * 100) / 100.0;
234    print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
235    $time = $time + $step;
236}
237
238print "</svg>\n";
239

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