scripts/trace/power.pl

   1 #!/usr/bin/perl
   2
   3 # Copyright 2008, Intel Corporation
   4 #
   5 # This file is part of the Linux kernel
   6 #
   7 # This program file is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by the
   9 # Free Software Foundation; version 2 of the License.
  10 #
  11 # This program is distributed in the hope that it will be useful, but WITHOUT
  12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 # for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program in a file named COPYING; if not, write to the
  18 # Free Software Foundation, Inc.,
  19 # 51 Franklin Street, Fifth Floor,
  20 # Boston, MA 02110-1301 USA
  21 #
  22 # Authors:
  23 #       Arjan van de Ven <arjan@linux.intel.com>
  24
  25
  26 #
  27 # This script turns a cstate ftrace output into a SVG graphic that shows
  28 # historic C-state information
  29 #
  30 #
  31 #       cat /sys/kernel/debug/tracing/trace | perl power.pl > out.svg
  32 #
  33
  34 my @styles;
  35 my $base = 0;
  36
  37 my @pstate_last;
  38 my @pstate_level;
  39
  40 $styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  41 $styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  42 $styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  43 $styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  44 $styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  45 $styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  46 $styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  47 $styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  48 $styles[8] = "fill:rgb(0,25,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
  49
  50
  51 print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
  52 print "<svg width=\"10000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
  53
  54 my $scale = 30000.0;
  55 while (<>) {
  56         my $line = $_;
  57         if ($line =~ /([0-9\.]+)\] CSTATE: Going to C([0-9]) on cpu ([0-9]+) for ([0-9\.]+)/) {
  58                 if ($base == 0) {
  59                         $base = $1;
  60                 }
  61                 my $time = $1 - $base;
  62                 $time = $time * $scale;
  63                 my $C = $2;
  64                 my $cpu = $3;
  65                 my $y = 400 * $cpu;
  66                 my $duration = $4 * $scale;
  67                 my $msec = int($4 * 100000)/100.0;
  68                 my $height = $C * 20;
  69                 $style = $styles[$C];
  70
  71                 $y = $y + 140 - $height;
  72
  73                 $x2 = $time + 4;
  74                 $y2 = $y + 4;
  75
  76
  77                 print "<rect x=\"$time\" width=\"$duration\" y=\"$y\" height=\"$height\" style=\"$style\"/>\n";
  78                 print "<text transform=\"translate($x2,$y2) rotate(90)\">C$C $msec</text>\n";
  79         }
  80         if ($line =~ /([0-9\.]+)\] PSTATE: Going to P([0-9]) on cpu ([0-9]+)/) {
  81                 my $time = $1 - $base;
  82                 my $state = $2;
  83                 my $cpu = $3;
  84
  85                 if (defined($pstate_last[$cpu])) {
  86                         my $from = $pstate_last[$cpu];
  87                         my $oldstate = $pstate_state[$cpu];
  88                         my $duration = ($time-$from) * $scale;
  89
  90                         $from = $from * $scale;
  91                         my $to = $from + $duration;
  92                         my $height = 140 - ($oldstate * (140/8));
  93
  94                         my $y = 400 * $cpu + 200 + $height;
  95                         my $y2 = $y+4;
  96                         my $style = $styles[8];
  97
  98                         print "<rect x=\"$from\" y=\"$y\" width=\"$duration\" height=\"5\" style=\"$style\"/>\n";
  99                         print "<text transform=\"translate($from,$y2)\">P$oldstate (cpu $cpu)</text>\n";
 100                 };
 101
 102                 $pstate_last[$cpu] = $time;
 103                 $pstate_state[$cpu] = $state;
 104         }
 105 }
 106
 107
 108 print "</svg>\n";