This file is indexed.

/usr/bin/llstat is in lustre-utils 1.8.5+dfsg-3ubuntu1.

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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
#!/usr/bin/perl
# llstat is a utility that takes stats files as input with optional 
# clear-flag. The clear-flag is used to clear the stats file before 
# printing stats information. The lustre stats files generally located
# inside proc/fs/lustre/. This program first reads the required statistics
# information from specified stat file, process the information and prints
# the output after every interval specified by user.

# Subroutine for printing usages information
sub usage()
{
	print STDERR "Usage: $pname [-c] [-g] [-i <interval>] [-h <help>] <stats_file>\n";
	print STDERR "       stats_file : /proc/fs/lustre/.../stat\n";
	print STDERR "       -i interval: polling period\n";
	print STDERR "       -c         : clear stats file first\n";
	print STDERR "       -g         : graphable output format\n";
	print STDERR "       -h         : help, display this information\n";
	print STDERR "example: $pname -i 1 ost (monitors /proc/fs/lustre/ost/OSS/ost/stats)\n";
	print STDERR "Use CTRL + C to stop statistics printing\n";
	exit 1;
}

sub print_headings()
{	my $cc = $_[0];
	if ($graphable) {
		if ( $print_once && $interval ) {
			printf "Timestamp [Name Count Rate Total Unit]...";
			printf "\n--------------------------------------------------------------------";
			$print_once = 0;
		}
		if ($cc && !$starttime) {
			$starttime = $cc
		}
	       	printf "\n%-5.0f", ($cc - $starttime);
	} else {
		printf "$statspath @ $cc\n";
		printf "%-25s %-10s %-10s %-10s", "Name", "Cur.Count", "Cur.Rate", "#Events";
		if ( $anysum ) {
			printf "%-8s %10s %10s %12s %10s", "Unit", "last", "min", "avg", "max";
		}
		if ( $anysumsquare ) {
			printf "%10s", "stddev";
		}
		printf "\n";
	}
}

# known units are: reqs, bytes, usec, bufs, regs, pages
# readstat subroutine reads and processes statistics from stats file.
# This subroutine gets called after every interval specified by user.
sub readstat()
{
	seek STATS, 0, 0;
	while (<STATS>) {
	chop;
	($name, $cumulcount, $samples, $unit, $min, $max, $sum, $sumsquare) 
		= split(/\s+/, $_);
	$prevcount = %cumulhash->{$name};
	if (defined($prevcount)) {
		$diff = $cumulcount - $prevcount;
		if ($name eq "snapshot_time") {
			$tdiff = int($diff);
			&print_headings($cumulcount);
			$| = 1;
			if ($tdiff == 0) {
			    $tdiff = 1; # avoid division by zero
			}
		}
		elsif ($cumulcount!=0) {
			if ($graphable) {
			    my $myunit = $unit;
			    my $myname = $name;
			    if (defined($sum)) {
				$myunit = "[reqs]";
				$myname = $myname . "_rq";
			    }
			    printf "   %s %lu %lu %lu %s", 
			    $myname, $diff, ($diff/$tdiff), $cumulcount, $myunit;
			} else {
			    printf "%-25s %-10lu %-10lu %-10lu",
			    $name, $diff, ($diff/$tdiff), $cumulcount;
			}
			if (defined($sum)) {
				my $sum_orig = $sum;
				my $sum_diff = $sum - %sumhash->{$name};
				if ($graphable) {
				    printf "   %s %lu %.2f %lu %s",
				    $name, $sum_diff, ($sum_diff/$tdiff), $sum, $unit;
				} else {
				    printf "%-8s %10lu %10lu %12.2f %10lu", $unit, 
				    $sum_diff, $min, ($sum/$cumulcount), $max;
				}
				if (defined($sumsquare)) {
					my $s = $sumsquare - (($sum_orig*$sum_orig)/$cumulcount);
					if ($s >= 0) {
						my $cnt = ($cumulcount >= 2) ? $cumulcount : 2 ;
						my $stddev = sqrt($s/($cnt - 1));
						if (!$graphable) {
							printf " %9.2f ", $stddev;
						}
					}
				}
			}
			if (!$graphable) {
				printf "\n";
			}
			$| = 1;
		}
	} else {
		if ($cumulcount!=0) {
			# print info when interval is not specified.
			printf "%-25s $cumulcount\n", $name
		}
		if (defined($sum)) {
			$anysum = 1;
		}
		if (defined($sumsquare)) {
			$anysumsquare = 1;
		}
	}
	%cumulhash->{$name} = $cumulcount;
	%sumhash->{$name} = $sum;
	} #end of while
}

#Globals
$pname = $0;
$defaultpath = "/proc/fs/lustre";
$obdstats = "stats";
$clear = 0;
$graphable = 0;
$interval = 0;
$statspath = "None";
$anysumsquare = 0;
$mhz = 0;
$print_once = 1;
%cumulhash;
%sumhash;
$anysum = 0;
$obddev = "";
$starttime = 0;
$ONE_MB = 1048576;

# Command line parameter parsing
use Getopt::Std;
getopts('hcgi:') or usage();
usage() if $opt_h;
$clear = 1 if $opt_c;
$graphable = 1 if $opt_g;
$interval = $opt_i if $opt_i;

my $i = 0;
foreach (@ARGV) {
        $obddev = $_;
        $i++;
        if ($i > 1) {
                print "ERROR: extra argument $_\n";
                usage();
        }
}
if ( !$obddev ) {
	print "ERROR: Need to specify stats_file\n";
	usage();
}
# Process arguments
if ( -f $obddev ) {
	$statspath = $obddev;
} elsif ( -f "$obddev/$obdstats" ) {
	$statspath = "$obddev/$obdstats";
} else {
	my $st = glob("$defaultpath/*/$obddev/$obdstats");
	if ( -f "$st" ) {
		$statspath = $st;
	} else {
		$st = glob("$defaultpath/*/*/$obddev/$obdstats");
		if ( -f "$st" ) {
			$statspath = $st;
		}
	}
}
if ( $statspath =~ /^None$/ ) {
	die "Cannot locate stat file for: $obddev\n";
}
# Clears stats file before printing information in intervals
if ( $clear ) {
	open ( STATS, "> $statspath") || die "Cannot clear $statspath: $!\n";
	print STATS " ";
	close STATS;
	sleep($interval);	    
}
use POSIX qw(strftime);
$time_v = time();
$hostname = `lctl list_nids | head -1`;
chop($hostname);
print "$pname: STATS on ", strftime("%D", localtime($time_v));
print " $statspath on $hostname\n";
open(STATS, $statspath) || die "Cannot open $statspath: $!\n";
do {
	readstat();
	if ($interval) { 
		sleep($interval);
	}
} while ($interval);
close STATS;