/usr/bin/likwid-setFrequencies is in likwid 3.1.3+dfsg1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | #!/usr/bin/perl
# =======================================================================================
#
# Filename: likwid-setFrequencies
#
# Description: Application allowing to change core frequencies
#
# Version: <VERSION>
# Released: <DATE>
#
# Author: Jan Treibig (jt), jan.treibig@gmail.com
# Project: likwid
#
# Copyright (C) 2014 Jan Treibig
#
# This program 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, either version 3 of the License, or (at your option) any later
# version.
#
# 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. If not, see <http://www.gnu.org/licenses/>.
#
# =======================================================================================
use Getopt::Std;
my $LIKWIDPIN = '/usr/bin/likwid-pin';
my $SYSPATH = '/sys/devices/system/cpu';
my $SYSCMD = '/usr/sbin/likwid-setFreq';
my $domain = 'N';
my $governor = 'ondemand';
my @processors;
my %frequencies;
my $freq_string;
use vars qw/ %opt /;
sub init
{
my $opt_string = 'g:c:f:lph';
getopts( $opt_string, \%opt ) or usage();
usage() if $opt{h};
if (scalar(keys %opt) == 0)
{
usage();
}
}
sub usage
{
print STDERR << "EOF";
This script allows to switch governors and set fixed
frequencies on Linux system.
usage: $0 [-hlp] [-g governor] [-c domain] [-f frequency]
-h : this (help) message
-p : print current frequencies
-l : list available frequencies
-c domain : likwid thread domain which to apply settings
(set to N if omitted)
-g governor : set governor (ondemand, performance, turbo)
(set to ondemand if omitted)
-f frequency: set fixed frequency, implicitly sets userspace
governor
example: $0 -c S0 -f 2.7 (set all CPUs on socket 0 to 2.7 GHz)
EOF
exit;
}
sub extractAvailableFrequencies
{
my @tmp_keys;
open FILE, "<$SYSPATH/cpu0/cpufreq/scaling_available_frequencies";
my $tmp = <FILE>;
my @list = split(/ /,$tmp);
close FILE;
$frequencies{'turbo'} = $list[0];
foreach my $item ( @list ) {
if( not $item =~ /\n/ ) {
my $key = $item/1000000.0;
push @tmp_keys, $key;
$frequencies{$key} = $item;
}
}
$freq_string = join(' ', sort @tmp_keys);
}
sub extractProcessorList
{
my $output = `$LIKWIDPIN -p`;
my $found = 0;
foreach my $line (split("\n",$output)) {
if ($line =~ /Tag ([NSCM][0-9]*): ([0-9 ]+)/) {
if ($domain eq $1) {
$found = 1;
@processors = split(/ /,$2);
last;
}
}
}
if ( not $found ) {
print "Domain $domain not available!\n";
exit;
}
}
init();
if (! -s $SYSCMD) {
die "ERROR Binary $SYSCMD not existing!\n\n";
}
if ( defined $opt{c}) {
$domain = $opt{c};
}
extractProcessorList();
extractAvailableFrequencies();
if ($opt{f}) {
$freq = $opt{f};
if (not exists($frequencies{$freq})) {
print "Frequency $freq not available!\nPlease select one of $freq_string\n";
exit;
}
foreach my $processID (@processors) {
# print "$SYSCMD $processID $frequencies{$freq}\n";
system("$SYSCMD $processID $frequencies{$freq}");
}
}
if ($opt{p}) {
foreach my $processID (@processors) {
open FILE,"<$SYSPATH/cpu".$processID."/cpufreq/scaling_governor";
my $gov = <FILE>;
chomp $gov;
close FILE;
open FILE,"<$SYSPATH/cpu".$processID."/cpufreq/scaling_cur_freq";
my $freq = <FILE>;
chomp $freq;
close FILE;
print "CPU $processID: governor $gov frequency $freq\n"
}
exit;
}
if ($opt{l}) {
print "Available frequencies: $freq_string\n";
exit;
}
if ($opt{g} eq 'turbo') {
foreach my $processID (@processors) {
# print "$SYSCMD $processID $frequencies{turbo}\n";
system("$SYSCMD $processID $frequencies{turbo}");
}
exit;
}
if ($opt{g}) {
$governor = $opt{g};
if (($governor ne "ondemand") and ($governor ne "performance")) {
print "Governor $governor not valid\n";
} else {
print "Set governor in domain $domain to $governor \n";
foreach my $processID (@processors) {
system("$SYSCMD $processID 0 $governor");
}
}
}
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