#!/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 $firsttime = 100; my $count = 0; 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; } } $row{$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-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 $stylecounter = 0; while (($key,$value) = each %start) { my $duration = $end{$key} - $start{$key}; if ($duration >= $threshold) { my $s, $s2, $e, $y; $s = ($value - $firsttime) * $mult; $s2 = $s + 6; $e = ($end{$key} - $firsttime) * $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 = $firsttime; my $step = ($maxtime - $firsttime) / 15; while ($time < $maxtime) { my $s2 = ($time - $firsttime) * $mult; my $tm = int($time * 100) / 100.0; print "<text transform=\"translate($s2,89) rotate(90)\">$tm</text>\n"; $time = $time + $step; } print "</svg>\n";