xref: /openbmc/linux/scripts/bootgraph.pl (revision 92b19ff5) 
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