mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 14:46:39 +07:00
f3f47a6768
Impact: new "power-tracer" ftrace plugin This patch adds a C/P-state ftrace plugin that will generate detailed statistics about the C/P-states that are being used, so that we can look at detailed decisions that the C/P-state code is making, rather than the too high level "average" that we have today. An example way of using this is: mount -t debugfs none /sys/kernel/debug echo cstate > /sys/kernel/debug/tracing/current_tracer echo 1 > /sys/kernel/debug/tracing/tracing_enabled sleep 1 echo 0 > /sys/kernel/debug/tracing/tracing_enabled cat /sys/kernel/debug/tracing/trace | perl scripts/trace/cstate.pl > out.svg Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
109 lines
3.3 KiB
Perl
109 lines
3.3 KiB
Perl
#!/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 cstate ftrace output into a SVG graphic that shows
|
|
# historic C-state information
|
|
#
|
|
#
|
|
# cat /sys/kernel/debug/tracing/trace | perl power.pl > out.svg
|
|
#
|
|
|
|
my @styles;
|
|
my $base = 0;
|
|
|
|
my @pstate_last;
|
|
my @pstate_level;
|
|
|
|
$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(0,25,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
|
|
|
|
|
|
print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
|
|
print "<svg width=\"10000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
|
|
|
|
my $scale = 30000.0;
|
|
while (<>) {
|
|
my $line = $_;
|
|
if ($line =~ /([0-9\.]+)\] CSTATE: Going to C([0-9]) on cpu ([0-9]+) for ([0-9\.]+)/) {
|
|
if ($base == 0) {
|
|
$base = $1;
|
|
}
|
|
my $time = $1 - $base;
|
|
$time = $time * $scale;
|
|
my $C = $2;
|
|
my $cpu = $3;
|
|
my $y = 400 * $cpu;
|
|
my $duration = $4 * $scale;
|
|
my $msec = int($4 * 100000)/100.0;
|
|
my $height = $C * 20;
|
|
$style = $styles[$C];
|
|
|
|
$y = $y + 140 - $height;
|
|
|
|
$x2 = $time + 4;
|
|
$y2 = $y + 4;
|
|
|
|
|
|
print "<rect x=\"$time\" width=\"$duration\" y=\"$y\" height=\"$height\" style=\"$style\"/>\n";
|
|
print "<text transform=\"translate($x2,$y2) rotate(90)\">C$C $msec</text>\n";
|
|
}
|
|
if ($line =~ /([0-9\.]+)\] PSTATE: Going to P([0-9]) on cpu ([0-9]+)/) {
|
|
my $time = $1 - $base;
|
|
my $state = $2;
|
|
my $cpu = $3;
|
|
|
|
if (defined($pstate_last[$cpu])) {
|
|
my $from = $pstate_last[$cpu];
|
|
my $oldstate = $pstate_state[$cpu];
|
|
my $duration = ($time-$from) * $scale;
|
|
|
|
$from = $from * $scale;
|
|
my $to = $from + $duration;
|
|
my $height = 140 - ($oldstate * (140/8));
|
|
|
|
my $y = 400 * $cpu + 200 + $height;
|
|
my $y2 = $y+4;
|
|
my $style = $styles[8];
|
|
|
|
print "<rect x=\"$from\" y=\"$y\" width=\"$duration\" height=\"5\" style=\"$style\"/>\n";
|
|
print "<text transform=\"translate($from,$y2)\">P$oldstate (cpu $cpu)</text>\n";
|
|
};
|
|
|
|
$pstate_last[$cpu] = $time;
|
|
$pstate_state[$cpu] = $state;
|
|
}
|
|
}
|
|
|
|
|
|
print "</svg>\n";
|