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1#!/usr/bin/perl -w2# SPDX-License-Identifier: GPL-2.0-only3# (c) 2010, Tom Zanussi <tzanussi@gmail.com>4 5# read/write top6#7# Periodically displays system-wide r/w call activity, broken down by8# pid. If an [interval] arg is specified, the display will be9# refreshed every [interval] seconds. The default interval is 310# seconds.11 12use 5.010000;13use strict;14use warnings;15 16use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib";17use lib "./Perf-Trace-Util/lib";18use Perf::Trace::Core;19use Perf::Trace::Util;20use POSIX qw/SIGALRM SA_RESTART/;21 22my $default_interval = 3;23my $nlines = 20;24my $print_thread;25my $print_pending = 0;26 27my %reads;28my %writes;29 30my $interval = shift;31if (!$interval) {32 $interval = $default_interval;33}34 35sub syscalls::sys_exit_read36{37 my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,38 $common_pid, $common_comm, $common_callchain,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}{$ret}++;50 }51}52 53sub syscalls::sys_enter_read54{55 my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,56 $common_pid, $common_comm, $common_callchain,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} = $common_comm;64}65 66sub syscalls::sys_exit_write67{68 my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,69 $common_pid, $common_comm, $common_callchain,70 $nr, $ret) = @_;71 72 print_check();73 74 if ($ret <= 0) {75 $writes{$common_pid}{errors}{$ret}++;76 }77}78 79sub syscalls::sys_enter_write80{81 my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,82 $common_pid, $common_comm, $common_callchain,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 92sub trace_begin93{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: $!\n";98 alarm 1;99}100 101sub trace_end102{103 print_unhandled();104 print_totals();105}106 107sub print_check()108{109 if ($print_pending == 1) {110 $print_pending = 0;111 print_totals();112 }113}114 115sub set_print_pending()116{117 $print_pending = 1;118 alarm $interval;119}120 121sub print_totals122{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 178my %unhandled;179 180sub print_unhandled181{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 197sub trace_unhandled198{199 my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,200 $common_pid, $common_comm, $common_callchain) = @_;201 202 $unhandled{$event_name}++;203}204