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bootgraph.pl
bootgraph.pl 6.28 KiB
#!/usr/bin/env 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;
use Getopt::Long;
my $header = 0;
sub help {
my $text = << "EOM";
Usage:
1) dmesg | perl scripts/bootgraph.pl [OPTION] > output.svg
2) perl scripts/bootgraph.pl -h
Options:
-header Insert kernel version and date
EOM
my $std=shift;
if ($std == 1) {
print STDERR $text;
} else {
print $text;
}
exit;
}
GetOptions(
'h|help' =>\&help,
'header' =>\$header
);
my %start;
my %end;
my %type;
my $done = 0;