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scripts/bootgraph.pl
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#!/usr/bin/env perl |
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# SPDX-License-Identifier: GPL-2.0-only |
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# Copyright 2008, Intel Corporation # # This file is part of the Linux kernel # |
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# 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 # |
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use strict; |
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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 ); |
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my %start; my %end; |
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my %type; |
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my $done = 0; |
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my $maxtime = 0; |
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my $firsttime = 99999; |
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my $count = 0; |
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my %pids; |
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my %pidctr; |
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my $headerstep = 20; my $xheader = 15; my $yheader = 25; my $cyheader = 0; |
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while (<>) { my $line = $_; |
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if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_\.]+)\+/) { |
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my $func = $2; if ($done == 0) { $start{$func} = $1; |
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$type{$func} = 0; |
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if ($1 < $firsttime) { $firsttime = $1; } |
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} |
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if ($line =~ /\@ ([0-9]+)/) { |
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$pids{$func} = $1; |
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} $count = $count + 1; } |
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if ($line =~ /([0-9\.]+)\] async_waiting @ ([0-9]+)/) { my $pid = $2; my $func; if (!defined($pidctr{$pid})) { $func = "wait_" . $pid . "_1"; $pidctr{$pid} = 1; } else { $pidctr{$pid} = $pidctr{$pid} + 1; $func = "wait_" . $pid . "_" . $pidctr{$pid}; } if ($done == 0) { $start{$func} = $1; $type{$func} = 1; if ($1 < $firsttime) { $firsttime = $1; } } $pids{$func} = $pid; $count = $count + 1; } |
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if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) { |
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if ($done == 0) { $end{$2} = $1; $maxtime = $1; } } |
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if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) { my $pid = $2; my $func = "wait_" . $pid . "_" . $pidctr{$pid}; $end{$func} = $1; $maxtime = $1; } |
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if ($line =~ /Write protecting the/) { $done = 1; } |
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if ($line =~ /Freeing unused kernel memory/) { $done = 1; } |
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} if ($count == 0) { |
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print STDERR <<END; No data found in the dmesg. Make sure that 'printk.time=1' and 'initcall_debug' are passed on the kernel command line. |
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END |
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help(1); |
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exit 1; |
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} print "<?xml version=\"1.0\" standalone=\"no\"?> "; |
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print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\"> "; |
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if ($header) { my $version = `uname -a`; my $date = `date`; print "<text transform=\"translate($xheader,$yheader)\">Kernel version: $version</text> "; $cyheader = $yheader+$headerstep; print "<text transform=\"translate($xheader,$cyheader)\">Date: $date</text> "; } |
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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)"; |
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my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)"; |
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my $mult = 1950.0 / ($maxtime - $firsttime); my $threshold2 = ($maxtime - $firsttime) / 120.0; my $threshold = $threshold2/10; |
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my $stylecounter = 0; |
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my %rows; my $rowscount = 1; |
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my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start); |
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foreach my $key (@initcalls) { |
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my $duration = $end{$key} - $start{$key}; if ($duration >= $threshold) { |
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my ($s, $s2, $s3, $e, $w, $y, $y2, $style); |
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my $pid = $pids{$key}; |
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if (!defined($rows{$pid})) { $rows{$pid} = $rowscount; $rowscount = $rowscount + 1; } |
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$s = ($start{$key} - $firsttime) * $mult; |
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$s2 = $s + 6; |
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$s3 = $s + 1; |
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$e = ($end{$key} - $firsttime) * $mult; |
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$w = $e - $s; |
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$y = $rows{$pid} * 150; |
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$y2 = $y + 4; $style = $styles[$stylecounter]; $stylecounter = $stylecounter + 1; if ($stylecounter > 11) { $stylecounter = 0; }; |
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if ($type{$key} == 1) { $y = $y + 15; print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/> "; |
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} else { |
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print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/> "; if ($duration >= $threshold2) { print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text> "; } else { print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text> "; } |
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} |
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} } # print the time line on top |
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my $time = $firsttime; my $step = ($maxtime - $firsttime) / 15; |
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while ($time < $maxtime) { |
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my $s3 = ($time - $firsttime) * $mult; |
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my $tm = int($time * 100) / 100.0; |
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print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text> "; |
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$time = $time + $step; |
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} print "</svg> "; |