mirror of
https://github.com/percona/percona-toolkit.git
synced 2025-09-18 09:43:09 +00:00
13c9c5b0bb
Missing a doc overhaul and tests, but this deals with most of the feature upgrades in the blueprint. The shell version of pt-diskstats is now in bin has pt-diskstats-shell, in case that's needed.
402 lines
12 KiB
Perl
402 lines
12 KiB
Perl
# 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.
|
|
# ###########################################################################
|
|
# DiskstatsMenu
|
|
# ###########################################################################
|
|
{
|
|
package DiskstatsMenu;
|
|
|
|
# DiskstatsMenu
|
|
|
|
use strict;
|
|
use warnings FATAL => 'all';
|
|
use English qw(-no_match_vars);
|
|
use constant MKDEBUG => $ENV{MKDEBUG} || 0;
|
|
|
|
use re qw( regexp_pattern );
|
|
|
|
use IO::Handle;
|
|
use IO::Select;
|
|
use Scalar::Util qw( looks_like_number blessed );
|
|
|
|
use ReadKeyMini qw( ReadMode );
|
|
|
|
require DiskstatsGroupByAll;
|
|
require DiskstatsGroupByDisk;
|
|
require DiskstatsGroupBySample;
|
|
|
|
our $VERSION = '0.01';
|
|
|
|
my %actions = (
|
|
'A' => \&group_by,
|
|
'D' => \&group_by,
|
|
'S' => \&group_by,
|
|
'i' => \&hide_inactive_disks,
|
|
'd' => get_new_value_for( "redisplay_interval", "Enter a new redisplay interval in seconds: " ),
|
|
'z' => get_new_value_for( "sample_time", "Enter a new interval between samples in seconds: " ),
|
|
'c' => get_new_x_regex( "column_regex", "Enter a column pattern: " ),
|
|
'/' => get_new_x_regex( "device_regex", "Enter a disk/device pattern: " ),
|
|
'q' => sub { return 'last' },
|
|
'p' => \&pause,
|
|
'?' => \&help,
|
|
);
|
|
|
|
my %option_to_object = (
|
|
D => "DiskstatsGroupByDisk",
|
|
A => "DiskstatsGroupByAll",
|
|
S => "DiskstatsGroupBySample",
|
|
);
|
|
|
|
my %object_to_option = reverse %option_to_object;
|
|
|
|
sub run_interactive {
|
|
my ($self, %args) = @_;
|
|
|
|
die "I need an [o] argument" unless $args{o} && blessed($args{o})
|
|
&& (
|
|
$args{o}->isa("OptionParser")
|
|
|| $args{o}->can("get")
|
|
);
|
|
my $o = $args{o};
|
|
|
|
my %opts = (
|
|
save_samples => $o->get('save-samples') || undef,
|
|
samples_to_gather => $o->get('iterations') || undef,
|
|
sampling_interval => $o->get('interval') || 1,
|
|
display_interval => 1,
|
|
sample_time => $o->get('sample-time') || 1,
|
|
column_regex => $o->get('columns') || undef,
|
|
device_regex => $o->get('devices') || undef,
|
|
interactive => 1,
|
|
filter_zeroed_rows => 0,
|
|
);
|
|
|
|
for my $re_key ( grep { $opts{$_} } qw( column_regex device_regex ) ) {
|
|
$opts{$re_key} = qr/$opts{$re_key}/i;
|
|
}
|
|
|
|
my ($tmp_fh, $filename, $child_pid, $child_fh);
|
|
|
|
# Here's a big crux of the program. If we have a filename, we don't
|
|
# need to fork and create a child, just read from it.
|
|
if ( $args{filename} ) {
|
|
$filename = $args{filename};
|
|
open $tmp_fh, "<", $filename or die "Couldn't open [$filename]: $OS_ERROR";
|
|
}
|
|
else {
|
|
($tmp_fh, $filename) = file_to_use( $opts{save_samples} );
|
|
|
|
# fork(), but future-proofing it in case we ever need to speak to
|
|
# the child
|
|
$child_pid = open $child_fh, "|-";
|
|
|
|
if (not defined $child_pid) {
|
|
die "Couldn't fork: $OS_ERROR";
|
|
}
|
|
|
|
if ( !$child_pid ) {
|
|
# Child
|
|
|
|
# Bit of helpful magic: Changes how the program's name is displayed,
|
|
# so it's easier to track in things like ps.
|
|
local $PROGRAM_NAME = "$PROGRAM_NAME (data-gathering daemon)";
|
|
|
|
close($tmp_fh);
|
|
|
|
open my $fh, ">>", $filename or die $!;
|
|
|
|
gather_samples(
|
|
gather_while => sub { getppid() },
|
|
samples_to_gather => $opts{samples_to_gather},
|
|
sampling_interval => $opts{sampling_interval},
|
|
filehandle => $fh,
|
|
);
|
|
|
|
close $fh or die $!;
|
|
unlink $filename unless $opts{save_samples};
|
|
exit(0);
|
|
}
|
|
}
|
|
|
|
local $SIG{CHLD} = 'IGNORE';
|
|
|
|
STDOUT->autoflush;
|
|
STDIN->blocking(0);
|
|
|
|
my $sel = IO::Select->new(\*STDIN);
|
|
my $class = $option_to_object{ substr uc($o->get('group-by') || 'Disk'), 0, 1 };
|
|
$opts{obj} = $class->new( %opts );
|
|
|
|
if ( $args{filename} ) {
|
|
group_by(
|
|
header_cb => sub { shift->print_header(@_) },
|
|
select_obj => $sel,
|
|
options => \%opts,
|
|
filehandle => $tmp_fh,
|
|
got => substr(uc($o->get('group-by') || 'Disk'), 0, 1),
|
|
);
|
|
}
|
|
|
|
ReadKeyMini::cbreak();
|
|
MAIN_LOOP:
|
|
while (1) {
|
|
if ( $sel->can_read( $opts{display_interval} ) ) {
|
|
while ( my $got = <STDIN> ) {
|
|
if ($actions{$got}) {
|
|
my $ret = $actions{$got}->(
|
|
select_obj => $sel,
|
|
options => \%opts,
|
|
got => $got,
|
|
filehandle => $tmp_fh,
|
|
) || '';
|
|
last MAIN_LOOP if $ret eq 'last';
|
|
}
|
|
}
|
|
}
|
|
# As a possible source of confusion, note that this calls the group_by
|
|
# _method_ in DiskstatsGroupBySomething, not the group_by _function_
|
|
# defined below.
|
|
$opts{obj}->group_by( filehandle => $tmp_fh, clear_state => 0 ) || 0;
|
|
|
|
if ( eof $tmp_fh ) {
|
|
# If we are gathering samples (don't have a filename), and we have a sample
|
|
# limit (set by --iterations), the child process just calls it quits once
|
|
# it gathers enough samples. When that happens, we are also done.
|
|
if ( !$args{filename} && $opts{samples_to_gather} && kill 0, $child_pid ) {
|
|
last MAIN_LOOP;
|
|
}
|
|
|
|
# This one comes from IO::Handle. I clears the eof flag
|
|
# from a filehandle, so we can try reading from it again.
|
|
$tmp_fh->clearerr;
|
|
}
|
|
}
|
|
ReadKeyMini::cooked();
|
|
|
|
if ( !$args{filename} ) {
|
|
close( $child_fh ) or die "Child error: $?";
|
|
kill 9, $child_pid;
|
|
}
|
|
close($tmp_fh) or die "Couldn't close: $OS_ERROR";
|
|
return;
|
|
}
|
|
|
|
sub gather_samples {
|
|
my (%opts) = @_;
|
|
my $samples = 0;
|
|
|
|
GATHER_DATA:
|
|
while ( $opts{gather_while}->() ) {
|
|
sleep($opts{sampling_interval});
|
|
open my $diskstats_fh, "<", "/proc/diskstats"
|
|
or die $!;
|
|
|
|
my @to_print = <$diskstats_fh>;
|
|
push @to_print, `date +'TS %s.%N %F %T'`;
|
|
|
|
# Lovely little method from IO::Handle: turns on autoflush,
|
|
# prints, and then restores the original autoflush state.
|
|
$opts{filehandle}->printflush(@to_print);
|
|
close $diskstats_fh or die $!;
|
|
|
|
$samples++;
|
|
if ( defined($opts{samples_to_gather}) && $samples >= $opts{samples_to_gather} ) {
|
|
last GATHER_DATA;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
sub group_by {
|
|
my (%args) = @_;
|
|
|
|
my $got = $args{got};
|
|
|
|
if ( ref( $args{options}->{obj} ) ne $option_to_object{$got} ) {
|
|
# Particularly important! Otherwise we would depend on the
|
|
# object's ->new being smart about discarding unrecognized
|
|
# values.
|
|
delete $args{options}->{obj};
|
|
# This would fail on a stricter constructor, so it probably
|
|
# needs fixing.
|
|
$args{options}->{obj} = $option_to_object{$got}->new( %{$args{options}});
|
|
}
|
|
seek $args{filehandle}, 0, 0;
|
|
|
|
# Just aliasing this for a bit.
|
|
for my $obj ( $args{options}->{obj} ) {
|
|
if ( $option_to_object{$got} eq "DiskstatsGroupBySample" ) {
|
|
$obj->interactive(1);
|
|
}
|
|
else {
|
|
$obj->interactive(0);
|
|
}
|
|
$obj->group_by(
|
|
filehandle => $args{filehandle},
|
|
# Only print the header once, as if in interactive.
|
|
header_cb => $args{header_cb} || sub {
|
|
my $print_header;
|
|
return sub {
|
|
unless ($print_header++) {
|
|
shift->print_header(@_)
|
|
}
|
|
};
|
|
}->(),
|
|
);
|
|
$obj->interactive(1);
|
|
$obj->{_print_header} = 0;
|
|
}
|
|
}
|
|
|
|
sub help {
|
|
my (%args) = @_;
|
|
my $obj = $args{options}->{obj};
|
|
my $mode = $object_to_option{ref($obj)};
|
|
my ($column_re) = regexp_pattern( $obj->column_regex() );
|
|
my ($device_re) = regexp_pattern( $obj->device_regex() );
|
|
my $interval = $obj->sample_time() || '(none)';
|
|
my $disp_int = $args{options}->{display_interval} || '(none)';
|
|
my $inact_disk = $obj->filter_zeroed_rows() || '';
|
|
|
|
for my $re ( $column_re, $device_re ) {
|
|
$re ||= '(none)';
|
|
$re =~ s/^\Q(?=)\E$//;
|
|
}
|
|
|
|
print <<"HELP";
|
|
You can control this program by key presses:
|
|
------------------- Key ------------------- ---- Current Setting ----
|
|
A, D, S) Set the group-by mode $mode
|
|
c) Enter a Perl regex to match column names $column_re
|
|
/) Enter a Perl regex to match disk names $device_re
|
|
z) Set the sample size in seconds $interval
|
|
i) Hide/show inactive disks $inact_disk
|
|
d) Set the redisplay interval in seconds $disp_int
|
|
p) Pause the program
|
|
q) Quit the program
|
|
------------------- Press any key to continue -----------------------
|
|
HELP
|
|
pause(@_);
|
|
}
|
|
|
|
sub file_to_use {
|
|
my ( $filename ) = @_;
|
|
#$filename ||= `mktemp -d /tmp/pt-diskstats.$PID.XXXXXXXX`;
|
|
if ( $filename ) {
|
|
open my $fh, "<", $filename
|
|
or die "Couldn't open $filename: $OS_ERROR";
|
|
return $fh, $filename;
|
|
}
|
|
else {
|
|
local $EVAL_ERROR;
|
|
if ( !eval { require File::Temp } ) {
|
|
die "Can't call mktemp nor load File::Temp. Please install either of those or pass in an explicit filename.";
|
|
}
|
|
my $dir = File::Temp::tempdir( CLEANUP => 1 );
|
|
return File::Temp::tempfile(
|
|
"pt-diskstats.$PID.XXXXXXXX",
|
|
DIR => $dir,
|
|
UNLINK => 1,
|
|
OPEN => 1,
|
|
);
|
|
}
|
|
}
|
|
|
|
sub get_input {
|
|
my ($message) = @_;
|
|
|
|
STDIN->blocking(1);
|
|
ReadKeyMini::cooked();
|
|
|
|
print $message;
|
|
chomp(my $new_opt = <STDIN>);
|
|
|
|
ReadKeyMini::cbreak();
|
|
STDIN->blocking(0);
|
|
return $new_opt;
|
|
}
|
|
|
|
sub hide_inactive_disks {
|
|
my (%args) = @_;
|
|
my $new_val = !!get_input("Filter inactive rows? (Leave blank for 'No') ");
|
|
|
|
$args{options}->{filter_zeroed_rows} = $new_val;
|
|
$args{options}->{obj}->filter_zeroed_rows($new_val);
|
|
return;
|
|
}
|
|
|
|
sub get_new_value_for {
|
|
my ($looking_for, $message) = @_;
|
|
return sub {
|
|
my (%args) = @_;
|
|
my $new_interval = get_input($message);
|
|
|
|
$new_interval ||= 0;
|
|
|
|
if ( looks_like_number($new_interval) ) {
|
|
if ( $args{options}->{obj}->can($looking_for) ) {
|
|
$args{options}->{obj}->$looking_for($new_interval);
|
|
}
|
|
return $args{options}->{$looking_for} = $new_interval;
|
|
}
|
|
else {
|
|
die("invalid timeout specification");
|
|
}
|
|
};
|
|
}
|
|
|
|
sub get_new_x_regex {
|
|
my ($looking_for, $message) = @_;
|
|
return sub {
|
|
my (%args) = @_;
|
|
my $new_regex = get_input($message);
|
|
|
|
local $EVAL_ERROR;
|
|
if ( $new_regex && (my $re = eval { qr/$new_regex/i }) ) {
|
|
$args{options}->{$looking_for} = $re;
|
|
}
|
|
elsif ( !$EVAL_ERROR && !$new_regex ) {
|
|
# This might seem weird, but an empty pattern is
|
|
# somewhat magical, and basically just asking for trouble.
|
|
# Instead we give them what awk would, a pattern that always
|
|
# matches.
|
|
$args{options}->{$looking_for} = qr/(?=)/;
|
|
}
|
|
else {
|
|
die("invalid regex specification: $EVAL_ERROR");
|
|
}
|
|
$args{options}->{obj}->$looking_for( $args{options}->{$looking_for} );
|
|
};
|
|
}
|
|
|
|
sub pause {
|
|
my (%args) = @_;
|
|
STDIN->blocking(1);
|
|
$args{select_obj}->can_read();
|
|
STDIN->blocking(0);
|
|
scalar <STDIN>;
|
|
return;
|
|
}
|
|
|
|
1;
|
|
#XXX TODO
|
|
#__PACKAGE__->run_interactive(@ARGV, o => bless {}, "OptionParser") unless caller;
|
|
|
|
}
|
|
# ###########################################################################
|
|
# End DiskstatsMenu package
|
|
# ########################################################################### |