tools/perf/scripts/perl/rwtop.pl

   1 #!/usr/bin/perl -w
   2 # (c) 2010, Tom Zanussi <tzanussi@gmail.com>
   3 # Licensed under the terms of the GNU GPL License version 2
   4
   5 # read/write top
   6 #
   7 # Periodically displays system-wide r/w call activity, broken down by
   8 # pid.  If an [interval] arg is specified, the display will be
   9 # refreshed every [interval] seconds.  The default interval is 3
  10 # seconds.
  11
  12 use 5.010000;
  13 use strict;
  14 use warnings;
  15
  16 use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib";
  17 use lib "./Perf-Trace-Util/lib";
  18 use Perf::Trace::Core;
  19 use Perf::Trace::Util;
  20 use POSIX qw/SIGALRM SA_RESTART/;
  21
  22 my $default_interval = 3;
  23 my $nlines = 20;
  24 my $print_thread;
  25 my $print_pending = 0;
  26
  27 my %reads;
  28 my %writes;
  29
  30 my $interval = shift;
  31 if (!$interval) {
  32     $interval = $default_interval;
  33 }
  34
  35 sub syscalls::sys_exit_read
  36 {
  37     my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
  38         $common_pid, $common_comm,
  39         $nr, $ret) = @_;
  40
  41     print_check();
  42
  43     if ($ret > 0) {
  44         $reads{$common_pid}{bytes_read} += $ret;
  45     } else {
  46         if (!defined ($reads{$common_pid}{bytes_read})) {
  47             $reads{$common_pid}{bytes_read} = 0;
  48         }
  49         $reads{$common_pid}{errors}{$ret}++;
  50     }
  51 }
  52
  53 sub syscalls::sys_enter_read
  54 {
  55     my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
  56         $common_pid, $common_comm,
  57         $nr, $fd, $buf, $count) = @_;
  58
  59     print_check();
  60
  61     $reads{$common_pid}{bytes_requested} += $count;
  62     $reads{$common_pid}{total_reads}++;
  63     $reads{$common_pid}{comm} = $common_comm;
  64 }
  65
  66 sub syscalls::sys_exit_write
  67 {
  68     my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
  69         $common_pid, $common_comm,
  70         $nr, $ret) = @_;
  71
  72     print_check();
  73
  74     if ($ret <= 0) {
  75         $writes{$common_pid}{errors}{$ret}++;
  76     }
  77 }
  78
  79 sub syscalls::sys_enter_write
  80 {
  81     my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
  82         $common_pid, $common_comm,
  83         $nr, $fd, $buf, $count) = @_;
  84
  85     print_check();
  86
  87     $writes{$common_pid}{bytes_written} += $count;
  88     $writes{$common_pid}{total_writes}++;
  89     $writes{$common_pid}{comm} = $common_comm;
  90 }
  91
  92 sub trace_begin
  93 {
  94     my $sa = POSIX::SigAction->new(\&set_print_pending);
  95     $sa->flags(SA_RESTART);
  96     $sa->safe(1);
  97     POSIX::sigaction(SIGALRM, $sa) or die "Can't set SIGALRM handler: $!\n";
  98     alarm 1;
  99 }
 100
 101 sub trace_end
 102 {
 103     print_unhandled();
 104     print_totals();
 105 }
 106
 107 sub print_check()
 108 {
 109     if ($print_pending == 1) {
 110         $print_pending = 0;
 111         print_totals();
 112     }
 113 }
 114
 115 sub set_print_pending()
 116 {
 117     $print_pending = 1;
 118     alarm $interval;
 119 }
 120
 121 sub print_totals
 122 {
 123     my $count;
 124
 125     $count = 0;
 126
 127     clear_term();
 128
 129     printf("\nread counts by pid:\n\n");
 130
 131     printf("%6s  %20s  %10s  %10s  %10s\n", "pid", "comm",
 132            "# reads", "bytes_req", "bytes_read");
 133     printf("%6s  %-20s  %10s  %10s  %10s\n", "------", "--------------------",
 134            "----------", "----------", "----------");
 135
 136     foreach my $pid (sort { ($reads{$b}{bytes_read} || 0) <=>
 137                                ($reads{$a}{bytes_read} || 0) } keys %reads) {
 138         my $comm = $reads{$pid}{comm} || "";
 139         my $total_reads = $reads{$pid}{total_reads} || 0;
 140         my $bytes_requested = $reads{$pid}{bytes_requested} || 0;
 141         my $bytes_read = $reads{$pid}{bytes_read} || 0;
 142
 143         printf("%6s  %-20s  %10s  %10s  %10s\n", $pid, $comm,
 144                $total_reads, $bytes_requested, $bytes_read);
 145
 146         if (++$count == $nlines) {
 147             last;
 148         }
 149     }
 150
 151     $count = 0;
 152
 153     printf("\nwrite counts by pid:\n\n");
 154
 155     printf("%6s  %20s  %10s  %13s\n", "pid", "comm",
 156            "# writes", "bytes_written");
 157     printf("%6s  %-20s  %10s  %13s\n", "------", "--------------------",
 158            "----------", "-------------");
 159
 160     foreach my $pid (sort { ($writes{$b}{bytes_written} || 0) <=>
 161                         ($writes{$a}{bytes_written} || 0)} keys %writes) {
 162         my $comm = $writes{$pid}{comm} || "";
 163         my $total_writes = $writes{$pid}{total_writes} || 0;
 164         my $bytes_written = $writes{$pid}{bytes_written} || 0;
 165
 166         printf("%6s  %-20s  %10s  %13s\n", $pid, $comm,
 167                $total_writes, $bytes_written);
 168
 169         if (++$count == $nlines) {
 170             last;
 171         }
 172     }
 173
 174     %reads = ();
 175     %writes = ();
 176 }
 177
 178 my %unhandled;
 179
 180 sub print_unhandled
 181 {
 182     if ((scalar keys %unhandled) == 0) {
 183         return;
 184     }
 185
 186     print "\nunhandled events:\n\n";
 187
 188     printf("%-40s  %10s\n", "event", "count");
 189     printf("%-40s  %10s\n", "----------------------------------------",
 190            "-----------");
 191
 192     foreach my $event_name (keys %unhandled) {
 193         printf("%-40s  %10d\n", $event_name, $unhandled{$event_name});
 194     }
 195 }
 196
 197 sub trace_unhandled
 198 {
 199     my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
 200         $common_pid, $common_comm) = @_;
 201
 202     $unhandled{$event_name}++;
 203 }