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Work in progress: Redesign pt-diskstats in Perl.

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Mostly bits and pieces at the moments. ReadKeyMini is a portable-ish
Term::ReadKey. Used here by DiskstatsMenu, which is currently only
for show.

Diskstats has most of the logic of the old pt-diskstats, with parts
now implemented by the DiskstatsGroupBy* classes; The latter subclass
the former.

As mentioned at the start, this is a work in progress. In addition to to
not having all the parts attached, also missing are the data-gathering mode,
the command-line argument parsing, and a large amount of tests.
This commit is contained in:
Brian Fraser
2011-12-08 19:26:04 -03:00
parent bbfaa22615
commit 43b29d6374
24 changed files with 17949 additions and 0 deletions
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90
lib/DiskstatsGroupByDisk.pm Normal file
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# This program is copyright 2011 Percona Inc.
# 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 MKDEBUG => $ENV{MKDEBUG} || 0;
use base qw( Diskstats );
sub new {
my ($class, %args) = @_;
my $self = $class->SUPER::new(%args);
$self->{iterations} = 0;
return $self;
}
# Prints out one line for each disk, summing over the interval from first to
# last sample.
sub group_by_disk {
my ($self, %args) = @_;
my ($header_cb, $rest_cb) = $args{ qw( header_cb rest_cb ) };
$self->clear_state;
$self->parse_from(
ts_callback => sub {
if ( $self->has_stats ) {
$self->{iterations}++
}
},
map({ ($_ => $args{$_}) } qw(filehandle filename data)),
);
if ( $self->{iterations} < 2 ) {
return;
}
$self->print_deltas( map( { ( $_ => $args{$_} ) } qw( header_cb rest_cb ) ) );
$self->clear_state;
}
sub clear_state {
my ($self, @args) = @_;
$self->{iterations} = 0;
$self->SUPER::clear_state(@args);
}
sub compute_line_ts {
my ($self, %args) = @_;
return "{" . ($self->{iterations} - 1) . "}";
}
sub delta_against {
my ($self, $dev) = @_;
return $self->first_stats_for($dev);
}
sub compute_in_progress {
my ($self, $in_progress, $tot_in_progress) = @_;
return $tot_in_progress / ($self->{iterations} - 1);
}
1;
}
# ###########################################################################
# End DiskstatsGroupByDisk package
# ###########################################################################