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203 lines
4.5 KiB
203 lines
4.5 KiB
#!/usr/bin/perl -w |
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# SPDX-License-Identifier: GPL-2.0-only |
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# (c) 2010, Tom Zanussi <[email protected]> |
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# read/write top |
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# |
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# Periodically displays system-wide r/w call activity, broken down by |
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# pid. If an [interval] arg is specified, the display will be |
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# refreshed every [interval] seconds. The default interval is 3 |
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# seconds. |
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use 5.010000; |
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use strict; |
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use warnings; |
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use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib"; |
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use lib "./Perf-Trace-Util/lib"; |
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use Perf::Trace::Core; |
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use Perf::Trace::Util; |
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use POSIX qw/SIGALRM SA_RESTART/; |
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my $default_interval = 3; |
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my $nlines = 20; |
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my $print_thread; |
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my $print_pending = 0; |
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my %reads; |
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my %writes; |
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my $interval = shift; |
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if (!$interval) { |
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$interval = $default_interval; |
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} |
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sub syscalls::sys_exit_read |
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{ |
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my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs, |
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$common_pid, $common_comm, $common_callchain, |
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$nr, $ret) = @_; |
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print_check(); |
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if ($ret > 0) { |
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$reads{$common_pid}{bytes_read} += $ret; |
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} else { |
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if (!defined ($reads{$common_pid}{bytes_read})) { |
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$reads{$common_pid}{bytes_read} = 0; |
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} |
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$reads{$common_pid}{errors}{$ret}++; |
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} |
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} |
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sub syscalls::sys_enter_read |
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{ |
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my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs, |
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$common_pid, $common_comm, $common_callchain, |
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$nr, $fd, $buf, $count) = @_; |
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print_check(); |
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$reads{$common_pid}{bytes_requested} += $count; |
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$reads{$common_pid}{total_reads}++; |
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$reads{$common_pid}{comm} = $common_comm; |
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} |
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sub syscalls::sys_exit_write |
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{ |
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my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs, |
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$common_pid, $common_comm, $common_callchain, |
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$nr, $ret) = @_; |
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print_check(); |
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if ($ret <= 0) { |
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$writes{$common_pid}{errors}{$ret}++; |
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} |
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} |
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sub syscalls::sys_enter_write |
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{ |
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my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs, |
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$common_pid, $common_comm, $common_callchain, |
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$nr, $fd, $buf, $count) = @_; |
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print_check(); |
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$writes{$common_pid}{bytes_written} += $count; |
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$writes{$common_pid}{total_writes}++; |
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$writes{$common_pid}{comm} = $common_comm; |
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} |
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sub trace_begin |
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{ |
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my $sa = POSIX::SigAction->new(\&set_print_pending); |
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$sa->flags(SA_RESTART); |
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$sa->safe(1); |
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POSIX::sigaction(SIGALRM, $sa) or die "Can't set SIGALRM handler: $!\n"; |
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alarm 1; |
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} |
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sub trace_end |
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{ |
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print_unhandled(); |
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print_totals(); |
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} |
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sub print_check() |
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{ |
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if ($print_pending == 1) { |
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$print_pending = 0; |
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print_totals(); |
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} |
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} |
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sub set_print_pending() |
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{ |
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$print_pending = 1; |
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alarm $interval; |
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} |
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sub print_totals |
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{ |
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my $count; |
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$count = 0; |
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clear_term(); |
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printf("\nread counts by pid:\n\n"); |
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printf("%6s %20s %10s %10s %10s\n", "pid", "comm", |
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"# reads", "bytes_req", "bytes_read"); |
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printf("%6s %-20s %10s %10s %10s\n", "------", "--------------------", |
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"----------", "----------", "----------"); |
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foreach my $pid (sort { ($reads{$b}{bytes_read} || 0) <=> |
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($reads{$a}{bytes_read} || 0) } keys %reads) { |
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my $comm = $reads{$pid}{comm} || ""; |
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my $total_reads = $reads{$pid}{total_reads} || 0; |
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my $bytes_requested = $reads{$pid}{bytes_requested} || 0; |
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my $bytes_read = $reads{$pid}{bytes_read} || 0; |
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printf("%6s %-20s %10s %10s %10s\n", $pid, $comm, |
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$total_reads, $bytes_requested, $bytes_read); |
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if (++$count == $nlines) { |
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last; |
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} |
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} |
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$count = 0; |
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printf("\nwrite counts by pid:\n\n"); |
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printf("%6s %20s %10s %13s\n", "pid", "comm", |
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"# writes", "bytes_written"); |
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printf("%6s %-20s %10s %13s\n", "------", "--------------------", |
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"----------", "-------------"); |
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foreach my $pid (sort { ($writes{$b}{bytes_written} || 0) <=> |
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($writes{$a}{bytes_written} || 0)} keys %writes) { |
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my $comm = $writes{$pid}{comm} || ""; |
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my $total_writes = $writes{$pid}{total_writes} || 0; |
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my $bytes_written = $writes{$pid}{bytes_written} || 0; |
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printf("%6s %-20s %10s %13s\n", $pid, $comm, |
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$total_writes, $bytes_written); |
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if (++$count == $nlines) { |
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last; |
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} |
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} |
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%reads = (); |
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%writes = (); |
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} |
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my %unhandled; |
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sub print_unhandled |
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{ |
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if ((scalar keys %unhandled) == 0) { |
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return; |
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} |
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print "\nunhandled events:\n\n"; |
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printf("%-40s %10s\n", "event", "count"); |
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printf("%-40s %10s\n", "----------------------------------------", |
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"-----------"); |
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foreach my $event_name (keys %unhandled) { |
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printf("%-40s %10d\n", $event_name, $unhandled{$event_name}); |
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} |
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} |
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sub trace_unhandled |
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{ |
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my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs, |
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$common_pid, $common_comm, $common_callchain) = @_; |
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$unhandled{$event_name}++; |
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}
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