tracing/fastboot: add a script to visualize the kernel boot process / time

[linux-2.6-block.git] / scripts / bootgraph.pl

diff --git a/scripts/bootgraph.pl b/scripts/bootgraph.pl
new file mode 100644 (file)
index 0000000..d459b8b
--- /dev/null
+++ b/scripts/bootgraph.pl
@@ -0,0 +1,138 @@
+#!/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 $count = 0;
+while (<>) {
+       my $line = $_;
+       if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z\_]+)\+/) {
+               my $func = $2;
+               if ($done == 0) {
+                       $start{$func} = $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-Z\_]+)\+.*returned/) {
+               if ($done == 0) {
+                       $end{$2} = $1;
+                       $maxtime = $1;
+               }
+       }
+       if ($line =~ /Write protecting the/) {
+               $done = 1;
+       }
+}
+
+if ($count == 0) {
+       print "No data found in the dmesg. Make sure CONFIG_PRINTK_TIME is enabled and\n";
+       print "that initcall_debug is 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;
+my $threshold = 0.0500 / $maxtime;
+my $stylecounter = 0;
+while (($key,$value) = each %start) {
+       my $duration = $end{$key} - $start{$key};
+
+       if ($duration >= $threshold) {
+               my $s, $s2, $e, $y;
+               $s = $value * $mult;
+               $s2 = $s + 6;
+               $e = $end{$key} * $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 $time = 0.0;
+while ($time < $maxtime) {
+       my $s2 = $time * $mult;
+       print "<text transform=\"translate($s2,89) rotate(90)\">$time</text>\n";
+       $time = $time + 0.1;
+}
+
+print "</svg>\n";