v4.19.13 snapshot.
diff --git a/tools/perf/scripts/perl/rw-by-pid.pl b/tools/perf/scripts/perl/rw-by-pid.pl
new file mode 100644
index 0000000..9db23c9
--- /dev/null
+++ b/tools/perf/scripts/perl/rw-by-pid.pl
@@ -0,0 +1,184 @@
+#!/usr/bin/perl -w
+# (c) 2009, Tom Zanussi <tzanussi@gmail.com>
+# Licensed under the terms of the GNU GPL License version 2
+
+# 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}++;
+}