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#!/usr/bin/perl

# Copyright 2008, Intel Corporation

#

# This file is part of the Linux kernel

#

# This program file is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License as published by the

# Free Software Foundation; version 2 of the License.

#

# This program is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License

# for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program in a file named COPYING; if not, write to the

# Free Software Foundation, Inc.,

# 51 Franklin Street, Fifth Floor,

# Boston, MA 02110-1301 USA

#

# Authors:

# Arjan van de Ven <arjan@linux.intel.com>

#

# This script turns a dmesg output into a SVG graphic that shows which

# functions take how much time. You can view SVG graphics with various

# programs, including Inkscape, The Gimp and Firefox.

#

#

# For this script to work, the kernel needs to be compiled with the

# CONFIG_PRINTK_TIME configuration option enabled, and with

# "initcall_debug" passed on the kernel command line.

#

# usage:

# dmesg | perl scripts/bootgraph.pl > output.svg

#

use strict;

my %start;

my %end;

my $done = 0;

my $maxtime = 0;

my $firsttime = 100;

my $count = 0;

my %pids;

while (<>) {

my $line = $_;

if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_]+)\+/) {

my $func = $2;

if ($done == 0) {

$start{$func} = $1;

if ($1 < $firsttime) {

$firsttime = $1;

}

}

if ($line =~ /\@ ([0-9]+)/) {

$pids{$func} = $1;

}

$count = $count + 1;

}

if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_]+)\+.*returned/) {

if ($done == 0) {

$end{$2} = $1;

$maxtime = $1;

}

}

if ($line =~ /Write protecting the/) {

$done = 1;

}

if ($line =~ /Freeing unused kernel memory/) {

$done = 1;

}

}

if ($count == 0) {

print "No data found in the dmesg. Make sure that 'printk.time=1' and\n";

print "'initcall_debug' are passed on the kernel command line.\n\n";

print "Usage: \n";

print " dmesg | perl scripts/bootgraph.pl > output.svg\n\n";

exit;

}

print "<?xml version=\"1.0\" standalone=\"no\"?> \n";

print "<svg width=\"1000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";

my @styles;

$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";

my $mult = 950.0 / ($maxtime - $firsttime);

my $threshold = ($maxtime - $firsttime) / 60.0;

my $stylecounter = 0;

my %rows;

my $rowscount = 1;

my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);

my $key;

foreach $key (@initcalls) {

my $duration = $end{$key} - $start{$key};

if ($duration >= $threshold) {

my ($s, $s2, $e, $w, $y, $y2, $style);

my $pid = $pids{$key};

if (!defined($rows{$pid})) {

$rows{$pid} = $rowscount;

$rowscount = $rowscount + 1;

}

$s = ($start{$key} - $firsttime) * $mult;

$s2 = $s + 6;

$e = ($end{$key} - $firsttime) * $mult;

$w = $e - $s;

$y = $rows{$pid} * 150;

$y2 = $y + 4;

$style = $styles[$stylecounter];

$stylecounter = $stylecounter + 1;

if ($stylecounter > 11) {

$stylecounter = 0;

};

print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";

print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";

}

}

# print the time line on top

my $time = $firsttime;

my $step = ($maxtime - $firsttime) / 15;

while ($time < $maxtime) {

my $s3 = ($time - $firsttime) * $mult;

my $tm = int($time * 100) / 100.0;

print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";

$time = $time + $step;

}

print "</svg>\n";