#!/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 %type;
my $done = 0;
my $maxtime = 0;
my $firsttime = 100;
my $count = 0;
my %pids;
my %pidctr;

while (<>) {
	my $line = $_;