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#!/usr/bin/perl -w
# SPDX-License-Identifier: GPL-2.0-only
# (c) 2009, Tom Zanussi <tzanussi@gmail.com>
# Display r/w activity for all processes
# The common_* event handler fields are the most useful fields common to
# all events. They don't necessarily correspond to the 'common_*' fields
# in the status files. Those fields not available as handler params can
# be retrieved via script functions of the form get_common_*().
use 5.010000;
use strict;
use warnings;
use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib";
use lib "./Perf-Trace-Util/lib";
use Perf::Trace::Core;
use Perf::Trace::Util;
my %reads;
my %writes;
sub syscalls::sys_exit_read
{
my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
$common_pid, $common_comm,
$nr, $ret) = @_;
if ($ret > 0) {
$reads{$common_pid}{bytes_read} += $ret;
} else {
if (!defined ($reads{$common_pid}{bytes_read})) {
$reads{$common_pid}{bytes_read} = 0;
}
$reads{$common_pid}{errors}{$ret}++;
}
}
sub syscalls::sys_enter_read
{
my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
$common_pid, $common_comm,
$nr, $fd, $buf, $count) = @_;
$reads{$common_pid}{bytes_requested} += $count;
$reads{$common_pid}{total_reads}++;
$reads{$common_pid}{comm} = $common_comm;
}
sub syscalls::sys_exit_write
{
my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
$common_pid, $common_comm,
$nr, $ret) = @_;
if ($ret <= 0) {
$writes{$common_pid}{errors}{$ret}++;
}
}
sub syscalls::sys_enter_write
{
my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
$common_pid, $common_comm,
$nr, $fd, $buf, $count) = @_;
$writes{$common_pid}{bytes_written} += $count;
$writes{$common_pid}{total_writes}++;
$writes{$common_pid}{comm} = $common_comm;
}
sub trace_end
{
printf("read counts by pid:\n\n");
printf("%6s %20s %10s %10s %10s\n", "pid", "comm",
"# reads", "bytes_requested", "bytes_read");
printf("%6s %-20s %10s %10s %10s\n", "------", "--------------------",
"-----------", "----------", "----------");
foreach my $pid (sort { ($reads{$b}{bytes_read} || 0) <=>
($reads{$a}{bytes_read} || 0) } keys %reads) {
my $comm = $reads{$pid}{comm} || "";
my $total_reads = $reads{$pid}{total_reads} || 0;
my $bytes_requested = $reads{$pid}{bytes_requested} || 0;
my $bytes_read = $reads{$pid}{bytes_read} || 0;
printf("%6s %-20s %10s %10s %10s\n", $pid, $comm,
$total_reads, $bytes_requested, $bytes_read);
}
printf("\nfailed reads by pid:\n\n");
printf("%6s %20s %6s %10s\n", "pid", "comm", "error #", "# errors");
printf("%6s %20s %6s %10s\n", "------", "--------------------",
"------", "----------");
my @errcounts = ();
foreach my $pid (keys %reads) {
foreach my $error (keys %{$reads{$pid}{errors}}) {
my $comm = $reads{$pid}{comm} || "";
my $errcount = $reads{$pid}{errors}{$error} || 0;
push @errcounts, [$pid, $comm, $error, $errcount];
}
}
@errcounts = sort { $b->[3] <=> $a->[3] } @errcounts;
for my $i (0 .. $#errcounts) {
printf("%6d %-20s %6d %10s\n", $errcounts[$i][0],
$errcounts[$i][1], $errcounts[$i][2], $errcounts[$i][3]);
}
printf("\nwrite counts by pid:\n\n");
printf("%6s %20s %10s %10s\n", "pid", "comm",
"# writes", "bytes_written");
printf("%6s %-20s %10s %10s\n", "------", "--------------------",
"-----------", "----------");
foreach my $pid (sort { ($writes{$b}{bytes_written} || 0) <=>
($writes{$a}{bytes_written} || 0)} keys %writes) {
my $comm = $writes{$pid}{comm} || "";
my $total_writes = $writes{$pid}{total_writes} || 0;
my $bytes_written = $writes{$pid}{bytes_written} || 0;
printf("%6s %-20s %10s %10s\n", $pid, $comm,
$total_writes, $bytes_written);
}
printf("\nfailed writes by pid:\n\n");
printf("%6s %20s %6s %10s\n", "pid", "comm", "error #", "# errors");
printf("%6s %20s %6s %10s\n", "------", "--------------------",
"------", "----------");
@errcounts = ();
foreach my $pid (keys %writes) {
foreach my $error (keys %{$writes{$pid}{errors}}) {
my $comm = $writes{$pid}{comm} || "";
my $errcount = $writes{$pid}{errors}{$error} || 0;
push @errcounts, [$pid, $comm, $error, $errcount];
}
}
@errcounts = sort { $b->[3] <=> $a->[3] } @errcounts;
for my $i (0 .. $#errcounts) {
printf("%6d %-20s %6d %10s\n", $errcounts[$i][0],
$errcounts[$i][1], $errcounts[$i][2], $errcounts[$i][3]);
}
print_unhandled();
}
my %unhandled;
sub print_unhandled
{
if ((scalar keys %unhandled) == 0) {
return;
}
print "\nunhandled events:\n\n";
printf("%-40s %10s\n", "event", "count");
printf("%-40s %10s\n", "----------------------------------------",
"-----------");
foreach my $event_name (keys %unhandled) {
printf("%-40s %10d\n", $event_name, $unhandled{$event_name});
}
}
sub trace_unhandled
{
my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
$common_pid, $common_comm) = @_;
$unhandled{$event_name}++;
}
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