This file is indexed.

/usr/bin/llobdstat 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
#!/usr/bin/perl
# llobdstat is a utility that parses obdfilter statistics files
# found at proc/fs/lustre/<ostname>/stats.
# It is mainly useful to watch the statistics change over time.

my $pname = $0;

my $defaultpath = "/proc/fs/lustre";
my $obdstats = "stats";

sub usage()
{
    print STDERR "Usage: $pname <ost_name> [<interval> [<count>}]\n";
    print STDERR "where  ost_name  : ost name under $defaultpath/obdfilter\n";
    print STDERR "       interval  : sample interaval in seconds\n";
    print STDERR "example: $pname lustre-OST0000 2\n";
    print STDERR "Use CTRL + C to stop statistics printing\n";
    exit 1;
}

my $statspath = "None";
my $interval = 0;
my $counter = undef;

if (($#ARGV < 0) || ($#ARGV > 2)) {
    usage();
} else {
    if ( $ARGV[0] =~ /help$/ ) {
        usage();
    }
    if ( -f $ARGV[0] ) {
        $statspath = $ARGV[0];
    } elsif ( -f "$ARGV[0]/$obdstats" ) {
        $statspath = "$ARGV[0]/$obdstats";
    } else {
        my $st = `ls $defaultpath/obdfilter/$ARGV[0]/$obdstats 2> /dev/null`;
        chop $st;
        if ( -f "$st" ) {
            $statspath = $st;
        }
    }
    if ( $statspath =~ /^None$/ ) {
        die "Cannot locate stat file for: $ARGV[0]\n";
    }
    if ($#ARGV > 0) {
        $interval = $ARGV[1];
    }
    if ($#ARGV > 1) {
        $counter = $ARGV[2];
    }
}

print "$pname on $statspath\n";

my %cur;
my %last;
my $mhz = 0;

# Removed some statstics like open, close that obdfilter doesn't contain.
# To add statistics parameters one needs to specify parameter names in the
# below declarations in the same sequence.
my ($read_bytes, $write_bytes, $create, $destroy, $statfs, $punch,
    $snapshot_time) = ("read_bytes", "write_bytes", "create", "destroy",
                       "statfs", "punch", "snapshot_time");

my @extinfo = ($create, $destroy, $statfs, $punch);
my %shortname = ($create => "cx", $destroy => "dx", $statfs => "st", $punch => "pu");

sub get_cpumhz()
{
    my $cpu_freq;
    my $itc_freq; # On Itanium systems use this
    if (open(CPUINFO, "/proc/cpuinfo")==0) {
        return;
    }
    while (<CPUINFO>) {
        if (/^cpu MHz\s+:\s*([\d\.]+)/) { $cpu_freq=$1; }
        elsif (/^itc MHz\s+:\s*([\d\.]+)/) { $itc_freq=$1; }
    }
    if (defined($itc_freq)) {
        $mhz = $itc_freq;
    } elsif (defined($cpu_freq)) {
        $mhz = $cpu_freq;
    } else {
        $mhz = 1;
    }
    close CPUINFO;
}

get_cpumhz();
print "Processor counters run at $mhz MHz\n";

# read statistics from obdfilter stats file.
# This subroutine gets called after every interval specified by user.
sub readstat()
{
    my $prevcount;
    my @iodata;

    seek STATS, 0, 0;
    while (<STATS>) {
        chop;
#        ($name, $cumulcount, $samples, $unit, $min, $max, $sum, $sumsquare)
        @iodata = split(/\s+/, $_);
        my $name = $iodata[0];

        $prevcount = $cur{$name};
        if (defined($prevcount)) {
            $last{$name} = $prevcount;
        }
        if ($name =~ /^read_bytes$/ || $name =~ /^write_bytes$/) {
            $cur{$name} = $iodata[6];
        }
        elsif ($name =~ /^snapshot_time$/) {
#            $cumulcount =~ /(\d+)/;
            $cur{$name} = $iodata[1];
        } else {
            $cur{$name} = $iodata[1];
        }
    }
}

# process stats information read from obdfilter stats file.
# This subroutine gets called after every interval specified by user.
sub process_stats()
{
    my $delta;
    my $data;
    my $last_time = $last{$snapshot_time};
    if (!defined($last_time)) {
        printf "Read: %-g, Write: %-g, create/destroy: %-g/%-g, stat: %-g, punch: %-g\n",
        $cur{$read_bytes}, $cur{$write_bytes},
        $cur{$create}, $cur{$destroy},
        $cur{$statfs}, $cur{$punch};
        if ($interval) {
            print "[NOTE: cx: create, dx: destroy, st: statfs, pu: punch ]\n\n";
            print "Timestamp   Read-delta  ReadRate  Write-delta  WriteRate\n";
            print "--------------------------------------------------------\n";
        }
    } else {
        my $timespan = $cur{$snapshot_time} - $last{$snapshot_time};
        my $rdelta = $cur{$read_bytes} - $last{$read_bytes};
        my $rrate = ($rdelta) / ($timespan * ( 1 << 20 ));
        my $wdelta = $cur{$write_bytes} - $last{$write_bytes};
        my $wrate = ($wdelta) / ($timespan * ( 1 << 20 ));
        $rdelta = ($rdelta) / (1024 * 1024);
        $wdelta = ($wdelta) / (1024 * 1024);
        # This print repeats after every interval.
        printf "%10lu  %6.2fMB  %6.2fMB/s   %6.2fMB  %6.2fMB/s",
               $cur{$snapshot_time}, $rdelta, $rrate, $wdelta, $wrate;

        $delta = $cur{$getattr} - $last{$getattr};
        if ( $delta != 0 ) {
            $rdelta = int ($delta/$timespan);
            print " ga:$delta,$rdelta/s";
        }

        for $data ( @extinfo ) {
            $delta = $cur{$data} - $last{$data};
            if ($delta != 0) {
                print " $shortname{$data}:$delta";
            }
        }
        print "\n";
        $| = 1;
    }
}

#Open the obdfilter stat file with STATS
open(STATS, $statspath) || die "Cannot open $statspath: $!\n";
do {
    # read the statistics from stat file.
    readstat();
    process_stats();
    if ($interval) {
        sleep($interval);
        %last = %cur;
    }
    # Repeat the statistics printing after every "interval" specified in
    # command line, up to counter times, if specified
} while ($interval && (defined($counter) ? $counter-- > 0 : 1));
close STATS;
# llobdfilter.pl ends here.