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![Alan Jenkins](/assets/img/avatar_default.png)
When bootgraph.pl parses a file, it gives one row for each initcall's pid. But they are displayed in random (perl hash) order. Let's sort the pids by the start time of their first initcall instead. This helps trace module initcalls, where each has a separate pid. bootgraph.pl will show module initcalls during the initramfs; it may also be adapted to show subsequent module initcalls. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Acked-by: Frédéric Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
154 lines
4.6 KiB
Perl
154 lines
4.6 KiB
Perl
#!/usr/bin/perl
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# Copyright 2008, Intel Corporation
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#
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# This file is part of the Linux kernel
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#
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# This program file is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program in a file named COPYING; if not, write to the
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# Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor,
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# Boston, MA 02110-1301 USA
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#
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# Authors:
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# Arjan van de Ven <arjan@linux.intel.com>
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#
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# This script turns a dmesg output into a SVG graphic that shows which
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# functions take how much time. You can view SVG graphics with various
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# programs, including Inkscape, The Gimp and Firefox.
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#
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#
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# For this script to work, the kernel needs to be compiled with the
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# CONFIG_PRINTK_TIME configuration option enabled, and with
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# "initcall_debug" passed on the kernel command line.
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#
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# usage:
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# dmesg | perl scripts/bootgraph.pl > output.svg
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#
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use strict;
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my %start;
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my %end;
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my $done = 0;
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my $maxtime = 0;
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my $firsttime = 100;
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my $count = 0;
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my %pids;
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while (<>) {
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my $line = $_;
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if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_]+)\+/) {
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my $func = $2;
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if ($done == 0) {
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$start{$func} = $1;
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if ($1 < $firsttime) {
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$firsttime = $1;
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}
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}
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if ($line =~ /\@ ([0-9]+)/) {
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$pids{$func} = $1;
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}
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$count = $count + 1;
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}
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if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_]+)\+.*returned/) {
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if ($done == 0) {
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$end{$2} = $1;
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$maxtime = $1;
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}
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}
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if ($line =~ /Write protecting the/) {
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$done = 1;
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}
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if ($line =~ /Freeing unused kernel memory/) {
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$done = 1;
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}
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}
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if ($count == 0) {
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print "No data found in the dmesg. Make sure that 'printk.time=1' and\n";
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print "'initcall_debug' are passed on the kernel command line.\n\n";
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print "Usage: \n";
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print " dmesg | perl scripts/bootgraph.pl > output.svg\n\n";
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exit;
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}
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print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
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print "<svg width=\"1000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
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my @styles;
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$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
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my $mult = 950.0 / ($maxtime - $firsttime);
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my $threshold = ($maxtime - $firsttime) / 60.0;
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my $stylecounter = 0;
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my %rows;
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my $rowscount = 1;
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my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
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my $key;
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foreach $key (@initcalls) {
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my $duration = $end{$key} - $start{$key};
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if ($duration >= $threshold) {
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my ($s, $s2, $e, $w, $y, $y2, $style);
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my $pid = $pids{$key};
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if (!defined($rows{$pid})) {
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$rows{$pid} = $rowscount;
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$rowscount = $rowscount + 1;
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}
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$s = ($start{$key} - $firsttime) * $mult;
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$s2 = $s + 6;
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$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 = $y + 4;
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$style = $styles[$stylecounter];
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$stylecounter = $stylecounter + 1;
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if ($stylecounter > 11) {
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$stylecounter = 0;
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};
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print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
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print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
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}
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}
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# print the time line on top
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my $time = $firsttime;
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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>\n";
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$time = $time + $step;
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}
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print "</svg>\n";
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