/usr/share/perl5/DiskstatsGroupByDisk.pm is in percona-toolkit 3.0.6+dfsg-2.
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 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 | # This program is copyright 2011 Percona Ireland Ltd.
# Feedback and improvements are welcome.
#
# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
# MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
# 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, version 2; OR the Perl Artistic License. On UNIX and similar
# systems, you can issue `man perlgpl' or `man perlartistic' to read these
# licenses.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 USA.
# ###########################################################################
# DiskstatsGroupByDisk package
# ###########################################################################
{
# Package: DiskstatsGroupByDisk
#
package DiskstatsGroupByDisk;
use warnings;
use strict;
use English qw(-no_match_vars);
use constant PTDEBUG => $ENV{PTDEBUG} || 0;
use base qw( Diskstats );
use POSIX qw( ceil );
sub new {
my ($class, %args) = @_;
my $self = $class->SUPER::new(%args);
$self->{_iterations} = 0;
return $self;
}
# Prints out one line for each disk, summing over the interval from first to
# last sample.
sub group_by {
my ($self, %args) = @_;
my @optional_args = qw( header_callback rows_callback );
my ($header_callback, $rows_callback) = $args{ @optional_args };
$self->clear_state() unless $self->interactive();
my $original_offset = ($args{filehandle} || ref($args{data}))
? tell($args{filehandle} || $args{data})
: undef;
my $lines_read = $self->parse_from(
sample_callback => sub {
my ($self, $ts) = @_;
if ( $self->has_stats() ) {
$self->{_iterations}++;
if ($self->interactive() && $self->{_iterations} >= 2) {
my $elapsed = ( $self->curr_ts() || 0 )
- ( $self->first_ts() || 0 );
if ( $ts > 0 && ceil($elapsed) >= $self->sample_time() ) {
$self->print_deltas(
header_callback => sub {
my ($self, @args) = @_;
if ( $self->force_header() ) {
my $method = $args{header_callback}
|| "print_header";
$self->$method(@args);
}
$self->set_force_header(undef);
},
rows_callback => $args{rows_callback},
);
return;
}
}
}
},
filehandle => $args{filehandle},
filename => $args{filename},
data => $args{data},
);
if ($self->interactive()) {
# This is a guard against the weird but nasty situation where
# we read several samples from the filehandle, but reach
# the end of file before $elapsed >= $self->sample_time().
# If that happens, we need to rewind the filehandle to
# where we started, so subsequent attempts (i.e. when
# the file has more data) have greater chances of succeeding,
# and no data goes unreported.
return $lines_read;
}
return if $self->{_iterations} < 2;
$self->print_deltas(
header_callback => $args{header_callback},
rows_callback => $args{rows_callback},
);
$self->clear_state();
return $lines_read;
}
sub clear_state {
my ($self, @args) = @_;
my $orig_print_h = $self->{force_header};
$self->{_iterations} = 0;
$self->SUPER::clear_state(@args);
$self->{force_header} = $orig_print_h;
}
sub compute_line_ts {
my ($self, %args) = @_;
if ( $self->show_timestamps() ) {
return $self->SUPER::compute_line_ts(%args);
}
else {
return "{" . ($self->{_iterations} - 1) . "}";
}
}
sub delta_against {
my ($self, $dev) = @_;
return $self->first_stats_for($dev);
}
sub ts_line_for_timestamp {
my ($self) = @_;
return $self->prev_ts_line();
}
sub delta_against_ts {
my ($self) = @_;
return $self->first_ts();
}
sub compute_in_progress {
my ($self, $in_progress, $tot_in_progress) = @_;
return $tot_in_progress / ($self->{_iterations} - 1);
}
1;
}
# ###########################################################################
# End DiskstatsGroupByDisk package
# ###########################################################################
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