/usr/share/perl5/ImVirt/Utils/jiffies.pm is in libimvirt-perl 0.9.6-3.
This file is owned by root:root, with mode 0o644.
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 | # ImVirt - I'm virtualized?
#
# Authors:
# Thomas Liske <liske@ibh.de>
#
# Copyright Holder:
# 2012 (C) IBH IT-Service GmbH [http://www.ibh.de/]
#
# License:
# 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 2 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 package; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
package ImVirt::Utils::jiffies;
use strict;
use warnings;
use File::Slurp;
use ImVirt::Utils::procfs;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(
jiffies_hz
jiffies_sec
);
our $VERSION = '0.1';
my @HZ = qw(100 250 300 1000);
my $hz = undef;
sub jiffies_hz() {
return $hz if(defined($hz));
my $uptime = procfs_read('uptime');
my $tlist = procfs_read('timer_list');
unless(defined($uptime) && defined($tlist)) {
ImVirt::debug(__PACKAGE__, "could not get timing data from procfs");
return undef;
}
$uptime =~ s/\s.+$//;
$tlist =~ /^jiffies: (\d+)$/m;
my $jiffies = $1 % (2**32);
$hz = $jiffies / $uptime;
ImVirt::debug(__PACKAGE__, "calculated jiffies: $hz");
foreach my $h (@HZ) {
if(abs($h - $hz) < $h*0.1) {
$hz = $h;
ImVirt::debug(__PACKAGE__, "estimated jiffies: $hz");
last;
}
}
return $hz;
}
sub jiffies_sec($) {
jiffies_hz();
return (shift) / $hz if(defined($hz));
return undef;
}
1;
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