1 files changed, 183 insertions, 0 deletions

diff --git a/meta/packages/linux/linux-moblin-2.6.27-rc6/0039-Add-a-script-to-visualize-the-kernel-boot-process.patch b/meta/packages/linux/linux-moblin-2.6.27-rc6/0039-Add-a-script-to-visualize-the-kernel-boot-process.patch
new file mode 100644
index 0000000000..da72d3bb75
--- /dev/null
+++ b/meta/packages/linux/linux-moblin-2.6.27-rc6/0039-Add-a-script-to-visualize-the-kernel-boot-process.patch
@@ -0,0 +1,183 @@
+From 77e9695b9d5c9ce761dedc193045d9cb64b8e245 Mon Sep 17 00:00:00 2001
+From: Arjan van de Ven <arjan@linux.intel.com>
+Date: Sat, 13 Sep 2008 09:36:06 -0700
+Subject: [PATCH] Add a script to visualize the kernel boot process / time
+
+When optimizing the kernel boot time, it's very valuable to visualize
+what is going on at which time. In addition, with the fastboot asynchronous
+initcall level, it's very valuable to see which initcall gets run where
+and when.
+
+This patch adds a script to turn a dmesg into a SVG graph (that can be
+shown with tools such as InkScape, Gimp or Firefox) and a small change
+to the initcall code to print the PID of the thread calling the initcall
+(so that the script can work out the parallelism).
+
+Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
+---
+ init/main.c          |    3 +-
+ scripts/bootgraph.pl |  138 ++++++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 140 insertions(+), 1 deletions(-)
+ create mode 100644 scripts/bootgraph.pl
+
+diff --git a/init/main.c b/init/main.c
+index a1b95f3..14f2609 100644
+--- a/init/main.c
++++ b/init/main.c
+@@ -708,7 +708,8 @@ int do_one_initcall(initcall_t fn)
+        int result;
+ 
+        if (initcall_debug) {
+-               print_fn_descriptor_symbol("calling  %s\n", fn);
++               print_fn_descriptor_symbol("calling  %s", fn);
++               printk(" @ %i\n",  task_pid_nr(current));
+                t0 = ktime_get();
+        }
+ 
+diff --git a/scripts/bootgraph.pl b/scripts/bootgraph.pl
+new file mode 100644
+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";
+-- 
+1.5.4.3
+