projects/linux·blob v2.6.28-rc9 · refs

154 lines · 4.6 KiB

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 <[email protected]>
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;
41
42my %start;
43my %end;
44my $done = 0;
45my $maxtime = 0;
46my $firsttime = 100;
47my $count = 0;
48my %pids;
49
50while (<>) {
51 my $line = $_;
52 if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_]+)\+/) {
53 my $func = $2;
54 if ($done == 0) {
55 $start{$func} = $1;
56 if ($1 < $firsttime) {
57 $firsttime = $1;
58 }
59 }
60 if ($line =~ /\@ ([0-9]+)/) {
61 $pids{$func} = $1;
62 }
63 $count = $count + 1;
64 }
65
66 if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_]+)\+.*returned/) {
67 if ($done == 0) {
68 $end{$2} = $1;
69 $maxtime = $1;
70 }
71 }
72 if ($line =~ /Write protecting the/) {
73 $done = 1;
74 }
75 if ($line =~ /Freeing unused kernel memory/) {
76 $done = 1;
77 }
78}
79
80if ($count == 0) {
81 print "No data found in the dmesg. Make sure that 'printk.time=1' and\n";
82 print "'initcall_debug' are passed on the kernel command line.\n\n";
83 print "Usage: \n";
84 print " dmesg | perl scripts/bootgraph.pl > output.svg\n\n";
85 exit;
86}
87
88print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
89print "<svg width=\"1000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
90
91my @styles;
92
93$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
94$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
95$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
96$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
97$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
98$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
99$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
100$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
101$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
102$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
103$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
104$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
105
106my $mult = 950.0 / ($maxtime - $firsttime);
107my $threshold = ($maxtime - $firsttime) / 60.0;
108my $stylecounter = 0;
109my %rows;
110my $rowscount = 1;
111my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
112my $key;
113foreach $key (@initcalls) {
114 my $duration = $end{$key} - $start{$key};
115
116 if ($duration >= $threshold) {
117 my ($s, $s2, $e, $w, $y, $y2, $style);
118 my $pid = $pids{$key};
119
120 if (!defined($rows{$pid})) {
121 $rows{$pid} = $rowscount;
122 $rowscount = $rowscount + 1;
123 }
124 $s = ($start{$key} - $firsttime) * $mult;
125 $s2 = $s + 6;
126 $e = ($end{$key} - $firsttime) * $mult;
127 $w = $e - $s;
128
129 $y = $rows{$pid} * 150;
130 $y2 = $y + 4;
131
132 $style = $styles[$stylecounter];
133 $stylecounter = $stylecounter + 1;
134 if ($stylecounter > 11) {
135 $stylecounter = 0;
136 };
137
138 print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
139 print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
140 }
141}
142
143
144# print the time line on top
145my $time = $firsttime;
146my $step = ($maxtime - $firsttime) / 15;
147while ($time < $maxtime) {
148 my $s3 = ($time - $firsttime) * $mult;
149 my $tm = int($time * 100) / 100.0;
150 print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
151 $time = $time + $step;
152}
153
154print "</svg>\n";