LXR linux/scripts/bootgraph.pl

   1#!/usr/bin/env perl
   2# SPDX-License-Identifier: GPL-2.0-only
   3
   4# Copyright 2008, Intel Corporation
   5#
   6# This file is part of the Linux kernel
   7#
   8# Authors:
   9#       Arjan van de Ven <arjan@linux.intel.com>
  10
  11
  12#
  13# This script turns a dmesg output into a SVG graphic that shows which
  14# functions take how much time. You can view SVG graphics with various
  15# programs, including Inkscape, The Gimp and Firefox.
  16#
  17#
  18# For this script to work, the kernel needs to be compiled with the
  19# CONFIG_PRINTK_TIME configuration option enabled, and with
  20# "initcall_debug" passed on the kernel command line.
  21#
  22# usage:
  23#       dmesg | perl scripts/bootgraph.pl > output.svg
  24#
  25
  26use strict;
  27use Getopt::Long;
  28my $header = 0;
  29
  30sub help {
  31        my $text = << "EOM";
  32Usage:
  331) dmesg | perl scripts/bootgraph.pl [OPTION] > output.svg
  342) perl scripts/bootgraph.pl -h
  35
  36Options:
  37        -header Insert kernel version and date
  38EOM
  39        my $std=shift;
  40        if ($std == 1) {
  41                print STDERR $text;
  42        } else {
  43                print $text;
  44        }
  45        exit;
  46}
  47
  48GetOptions(
  49        'h|help'        =>\&help,
  50        'header'        =>\$header
  51);
  52
  53my %start;
  54my %end;
  55my %type;
  56my $done = 0;
  57my $maxtime = 0;
  58my $firsttime = 99999;
  59my $count = 0;
  60my %pids;
  61my %pidctr;
  62
  63my $headerstep = 20;
  64my $xheader = 15;
  65my $yheader = 25;
  66my $cyheader = 0;
  67
  68while (<>) {
  69        my $line = $_;
  70        if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z0-9\_\.]+)\+/) {
  71                my $func = $2;
  72                if ($done == 0) {
  73                        $start{$func} = $1;
  74                        $type{$func} = 0;
  75                        if ($1 < $firsttime) {
  76                                $firsttime = $1;
  77                        }
  78                }
  79                if ($line =~ /\@ ([0-9]+)/) {
  80                        $pids{$func} = $1;
  81                }
  82                $count = $count + 1;
  83        }
  84
  85        if ($line =~ /([0-9\.]+)\] async_waiting @ ([0-9]+)/) {
  86                my $pid = $2;
  87                my $func;
  88                if (!defined($pidctr{$pid})) {
  89                        $func = "wait_" . $pid . "_1";
  90                        $pidctr{$pid} = 1;
  91                } else {
  92                        $pidctr{$pid} = $pidctr{$pid} + 1;
  93                        $func = "wait_" . $pid . "_" . $pidctr{$pid};
  94                }
  95                if ($done == 0) {
  96                        $start{$func} = $1;
  97                        $type{$func} = 1;
  98                        if ($1 < $firsttime) {
  99                                $firsttime = $1;
 100                        }
 101                }
 102                $pids{$func} = $pid;
 103                $count = $count + 1;
 104        }
 105
 106        if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
 107                if ($done == 0) {
 108                        $end{$2} = $1;
 109                        $maxtime = $1;
 110                }
 111        }
 112
 113        if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
 114                my $pid = $2;
 115                my $func =  "wait_" . $pid . "_" . $pidctr{$pid};
 116                $end{$func} = $1;
 117                $maxtime = $1;
 118        }
 119        if ($line =~ /Write protecting the/) {
 120                $done = 1;
 121        }
 122        if ($line =~ /Freeing unused kernel memory/) {
 123                $done = 1;
 124        }
 125}
 126
 127if ($count == 0) {
 128    print STDERR <<END;
 129No data found in the dmesg. Make sure that 'printk.time=1' and
 130'initcall_debug' are passed on the kernel command line.
 131END
 132        help(1);
 133    exit 1;
 134}
 135
 136print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
 137print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
 138
 139
 140if ($header) {
 141        my $version = `uname -a`;
 142        my $date = `date`;
 143        print "<text transform=\"translate($xheader,$yheader)\">Kernel version: $version</text>\n";
 144        $cyheader = $yheader+$headerstep;
 145        print "<text transform=\"translate($xheader,$cyheader)\">Date: $date</text>\n";
 146}
 147
 148my @styles;
 149
 150$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 151$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 152$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 153$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 154$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 155$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 156$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 157$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 158$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 159$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 160$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 161$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
 162
 163my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
 164
 165my $mult = 1950.0 / ($maxtime - $firsttime);
 166my $threshold2 = ($maxtime - $firsttime) / 120.0;
 167my $threshold = $threshold2/10;
 168my $stylecounter = 0;
 169my %rows;
 170my $rowscount = 1;
 171my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
 172
 173foreach my $key (@initcalls) {
 174        my $duration = $end{$key} - $start{$key};
 175
 176        if ($duration >= $threshold) {
 177                my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
 178                my $pid = $pids{$key};
 179
 180                if (!defined($rows{$pid})) {
 181                        $rows{$pid} = $rowscount;
 182                        $rowscount = $rowscount + 1;
 183                }
 184                $s = ($start{$key} - $firsttime) * $mult;
 185                $s2 = $s + 6;
 186                $s3 = $s + 1;
 187                $e = ($end{$key} - $firsttime) * $mult;
 188                $w = $e - $s;
 189
 190                $y = $rows{$pid} * 150;
 191                $y2 = $y + 4;
 192
 193                $style = $styles[$stylecounter];
 194                $stylecounter = $stylecounter + 1;
 195                if ($stylecounter > 11) {
 196                        $stylecounter = 0;
 197                };
 198
 199                if ($type{$key} == 1) {
 200                        $y = $y + 15;
 201                        print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
 202                } else {
 203                        print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
 204                        if ($duration >= $threshold2) {
 205                                print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
 206                        } else {
 207                                print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text>\n";
 208                        }
 209                }
 210        }
 211}
 212
 213
 214# print the time line on top
 215my $time = $firsttime;
 216my $step = ($maxtime - $firsttime) / 15;
 217while ($time < $maxtime) {
 218        my $s3 = ($time - $firsttime) * $mult;
 219        my $tm = int($time * 100) / 100.0;
 220        print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
 221        $time = $time + $step;
 222}
 223
 224print "</svg>\n";
 225