Root/scripts/bootgraph.pl

Source at commit cdde9cf73945d547acd3e96f9508c79e84ad0bf1 created 9 years 4 months ago.
By Maarten ter Huurne, MMC: JZ4740: Added support for CPU frequency changing
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;
41
42my %start;
43my %end;
44my %type;
45my $done = 0;
46my $maxtime = 0;
47my $firsttime = 99999;
48my $count = 0;
49my %pids;
50my %pidctr;
51
52while (<>) {
53    my $line = $_;
54    if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_\.]+)\+/) {
55        my $func = $2;
56        if ($done == 0) {
57            $start{$func} = $1;
58            $type{$func} = 0;
59            if ($1 < $firsttime) {
60                $firsttime = $1;
61            }
62        }
63        if ($line =~ /\@ ([0-9]+)/) {
64            $pids{$func} = $1;
65        }
66        $count = $count + 1;
67    }
68
69    if ($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 = $count + 1;
88    }
89
90    if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
91        if ($done == 0) {
92            $end{$2} = $1;
93            $maxtime = $1;
94        }
95    }
96
97    if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
98        my $pid = $2;
99        my $func = "wait_" . $pid . "_" . $pidctr{$pid};
100        $end{$func} = $1;
101        $maxtime = $1;
102    }
103    if ($line =~ /Write protecting the/) {
104        $done = 1;
105    }
106    if ($line =~ /Freeing unused kernel memory/) {
107        $done = 1;
108    }
109}
110
111if ($count == 0) {
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;
119}
120
121print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
122print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
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
139my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
140
141my $mult = 1950.0 / ($maxtime - $firsttime);
142my $threshold2 = ($maxtime - $firsttime) / 120.0;
143my $threshold = $threshold2/10;
144my $stylecounter = 0;
145my %rows;
146my $rowscount = 1;
147my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
148
149foreach my $key (@initcalls) {
150    my $duration = $end{$key} - $start{$key};
151
152    if ($duration >= $threshold) {
153        my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
154        my $pid = $pids{$key};
155
156        if (!defined($rows{$pid})) {
157            $rows{$pid} = $rowscount;
158            $rowscount = $rowscount + 1;
159        }
160        $s = ($start{$key} - $firsttime) * $mult;
161        $s2 = $s + 6;
162        $s3 = $s + 1;
163        $e = ($end{$key} - $firsttime) * $mult;
164        $w = $e - $s;
165
166        $y = $rows{$pid} * 150;
167        $y2 = $y + 4;
168
169        $style = $styles[$stylecounter];
170        $stylecounter = $stylecounter + 1;
171        if ($stylecounter > 11) {
172            $stylecounter = 0;
173        };
174
175        if ($type{$key} == 1) {
176            $y = $y + 15;
177            print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
178        } else {
179            print "<rect x=\"$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            }
185        }
186    }
187}
188
189
190# print the time line on top
191my $time = $firsttime;
192my $step = ($maxtime - $firsttime) / 15;
193while ($time < $maxtime) {
194    my $s3 = ($time - $firsttime) * $mult;
195    my $tm = int($time * 100) / 100.0;
196    print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
197    $time = $time + $step;
198}
199
200print "</svg>\n";
201

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