Add a script to visualize the kernel boot process / time

	int result;

	if (initcall_debug) {

		printk("calling  %pF\n", fn);

		printk("calling  %pF @ %i\n", fn, task_pid_nr(current));

		t0 = ktime_get();

	}

#!/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

#

my @rows;

my %start, %end, %row;

my $done = 0;

my $rowcount = 0;

my $maxtime = 0;

my $count = 0;

while (<>) {

	my $line = $_;

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

		my $func = $2;

		if ($done == 0) {

			$start{$func} = $1;

		}

		$row{$func} = 1;

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

			my $pid = $1;

			if (!defined($rows[$pid])) {

				$rowcount = $rowcount + 1;

				$rows[$pid] = $rowcount;

			}

			$row{$func} = $rows[$pid];

		}

		$count = $count + 1;

	}

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

		if ($done == 0) {

			$end{$2} = $1;

			$maxtime = $1;

		}

	}

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

		$done = 1;

	}

}

if ($count == 0) {

	print "No data found in the dmesg. Make sure CONFIG_PRINTK_TIME is enabled and\n";

	print "that initcall_debug is 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;

my $threshold = 0.0500 / $maxtime;

my $stylecounter = 0;

while (($key,$value) = each %start) {

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

	if ($duration >= $threshold) {

		my $s, $s2, $e, $y;

		$s = $value * $mult;

		$s2 = $s + 6;

		$e = $end{$key} * $mult;

		$w = $e - $s;

		$y = $row{$key} * 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 = 0.0;

while ($time < $maxtime) {

	my $s2 = $time * $mult;

	print "<text transform=\"translate($s2,89) rotate(90)\">$time</text>\n";

	$time = $time + 0.1;

}

print "</svg>\n";