xref: /openbmc/linux/scripts/bootgraph.pl (revision bbb774d9) 
1#!/usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0-only
3
4# Copyright 2008, Intel Corporation
5#
6# This file is part of the Linux kernel
7#
8# Authors:
9# 	Arjan van de Ven <arjan@linux.intel.com>
10
11
12#
13# This script turns a dmesg output into a SVG graphic that shows which
14# functions take how much time. You can view SVG graphics with various
15# programs, including Inkscape, The Gimp and Firefox.
16#
17#
18# For this script to work, the kernel needs to be compiled with the
19# CONFIG_PRINTK_TIME configuration option enabled, and with
20# "initcall_debug" passed on the kernel command line.
21#
22# usage:
23# 	dmesg | perl scripts/bootgraph.pl > output.svg
24#
25
26use strict;
27use Getopt::Long;
28my $header = 0;
29
30sub help {
31	my $text = << "EOM";
32Usage:
331) dmesg | perl scripts/bootgraph.pl [OPTION] > output.svg
342) perl scripts/bootgraph.pl -h
35
36Options:
37	-header	Insert kernel version and date
38EOM
39	my $std=shift;
40	if ($std == 1) {
41		print STDERR $text;
42	} else {
43		print $text;
44	}
45	exit;
46}
47
48GetOptions(
49	'h|help'	=>\&help,
50	'header'	=>\$header
51);
52
53my %start;
54my %end;
55my %type;
56my $done = 0;
57my $maxtime = 0;
58my $firsttime = 99999;
59my $count = 0;
60my %pids;
61my %pidctr;
62
63my $headerstep = 20;
64my $xheader = 15;
65my $yheader = 25;
66my $cyheader = 0;
67
68while (<>) {
69	my $line = $_;
70	if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z0-9\_\.]+)\+/) {
71		my $func = $2;
72		if ($done == 0) {
73			$start{$func} = $1;
74			$type{$func} = 0;
75			if ($1 < $firsttime) {
76				$firsttime = $1;
77			}
78		}
79		if ($line =~ /\@ ([0-9]+)/) {
80			$pids{$func} = $1;
81		}
82		$count = $count + 1;
83	}
84
85	if ($line =~ /([0-9\.]+)\] async_waiting @ ([0-9]+)/) {
86		my $pid = $2;
87		my $func;
88		if (!defined($pidctr{$pid})) {
89			$func = "wait_" . $pid . "_1";
90			$pidctr{$pid} = 1;
91		} else {
92			$pidctr{$pid} = $pidctr{$pid} + 1;
93			$func = "wait_" . $pid . "_" . $pidctr{$pid};
94		}
95		if ($done == 0) {
96			$start{$func} = $1;
97			$type{$func} = 1;
98			if ($1 < $firsttime) {
99				$firsttime = $1;
100			}
101		}
102		$pids{$func} = $pid;
103		$count = $count + 1;
104	}
105
106	if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
107		if ($done == 0) {
108			$end{$2} = $1;
109			$maxtime = $1;
110		}
111	}
112
113	if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
114		my $pid = $2;
115		my $func =  "wait_" . $pid . "_" . $pidctr{$pid};
116		$end{$func} = $1;
117		$maxtime = $1;
118	}
119	if ($line =~ /Write protecting the/) {
120		$done = 1;
121	}
122	if ($line =~ /Freeing unused kernel memory/) {
123		$done = 1;
124	}
125}
126
127if ($count == 0) {
128    print STDERR <<END;
129No data found in the dmesg. Make sure that 'printk.time=1' and
130'initcall_debug' are passed on the kernel command line.
131END
132	help(1);
133    exit 1;
134}
135
136print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
137print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
138
139
140if ($header) {
141	my $version = `uname -a`;
142	my $date = `date`;
143	print "<text transform=\"translate($xheader,$yheader)\">Kernel version: $version</text>\n";
144	$cyheader = $yheader+$headerstep;
145	print "<text transform=\"translate($xheader,$cyheader)\">Date: $date</text>\n";
146}
147
148my @styles;
149
150$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
151$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
152$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
153$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
154$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
155$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
156$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
157$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
158$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
159$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
160$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
161$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
162
163my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
164
165my $mult = 1950.0 / ($maxtime - $firsttime);
166my $threshold2 = ($maxtime - $firsttime) / 120.0;
167my $threshold = $threshold2/10;
168my $stylecounter = 0;
169my %rows;
170my $rowscount = 1;
171my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
172
173foreach my $key (@initcalls) {
174	my $duration = $end{$key} - $start{$key};
175
176	if ($duration >= $threshold) {
177		my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
178		my $pid = $pids{$key};
179
180		if (!defined($rows{$pid})) {
181			$rows{$pid} = $rowscount;
182			$rowscount = $rowscount + 1;
183		}
184		$s = ($start{$key} - $firsttime) * $mult;
185		$s2 = $s + 6;
186		$s3 = $s + 1;
187		$e = ($end{$key} - $firsttime) * $mult;
188		$w = $e - $s;
189
190		$y = $rows{$pid} * 150;
191		$y2 = $y + 4;
192
193		$style = $styles[$stylecounter];
194		$stylecounter = $stylecounter + 1;
195		if ($stylecounter > 11) {
196			$stylecounter = 0;
197		};
198
199		if ($type{$key} == 1) {
200			$y = $y + 15;
201			print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
202		} else {
203			print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
204			if ($duration >= $threshold2) {
205				print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
206			} else {
207				print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text>\n";
208			}
209		}
210	}
211}
212
213
214# print the time line on top
215my $time = $firsttime;
216my $step = ($maxtime - $firsttime) / 15;
217while ($time < $maxtime) {
218	my $s3 = ($time - $firsttime) * $mult;
219	my $tm = int($time * 100) / 100.0;
220	print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
221	$time = $time + $step;
222}
223
224print "</svg>\n";
225