xref: /linux/tools/perf/scripts/perl/rw-by-pid.pl (revision 1d2af80d581d1bae81594e497cd57e345235b940) 
1#!/usr/bin/perl -w
2# SPDX-License-Identifier: GPL-2.0-only
3# (c) 2009, Tom Zanussi <tzanussi@gmail.com>
4
5# Display r/w activity for all processes
6
7# The common_* event handler fields are the most useful fields common to
8# all events.  They don't necessarily correspond to the 'common_*' fields
9# in the status files.  Those fields not available as handler params can
10# be retrieved via script functions of the form get_common_*().
11
12use 5.010000;
13use strict;
14use warnings;
15
16use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib";
17use lib "./Perf-Trace-Util/lib";
18use Perf::Trace::Core;
19use Perf::Trace::Util;
20
21my %reads;
22my %writes;
23
24sub syscalls::sys_exit_read
25{
26    my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
27	$common_pid, $common_comm,
28	$nr, $ret) = @_;
29
30    if ($ret > 0) {
31	$reads{$common_pid}{bytes_read} += $ret;
32    } else {
33	if (!defined ($reads{$common_pid}{bytes_read})) {
34	    $reads{$common_pid}{bytes_read} = 0;
35	}
36	$reads{$common_pid}{errors}{$ret}++;
37    }
38}
39
40sub syscalls::sys_enter_read
41{
42    my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
43	$common_pid, $common_comm,
44	$nr, $fd, $buf, $count) = @_;
45
46    $reads{$common_pid}{bytes_requested} += $count;
47    $reads{$common_pid}{total_reads}++;
48    $reads{$common_pid}{comm} = $common_comm;
49}
50
51sub syscalls::sys_exit_write
52{
53    my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
54	$common_pid, $common_comm,
55	$nr, $ret) = @_;
56
57    if ($ret <= 0) {
58	$writes{$common_pid}{errors}{$ret}++;
59    }
60}
61
62sub syscalls::sys_enter_write
63{
64    my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
65	$common_pid, $common_comm,
66	$nr, $fd, $buf, $count) = @_;
67
68    $writes{$common_pid}{bytes_written} += $count;
69    $writes{$common_pid}{total_writes}++;
70    $writes{$common_pid}{comm} = $common_comm;
71}
72
73sub trace_end
74{
75    printf("read counts by pid:\n\n");
76
77    printf("%6s  %20s  %10s  %10s  %10s\n", "pid", "comm",
78	   "# reads", "bytes_requested", "bytes_read");
79    printf("%6s  %-20s  %10s  %10s  %10s\n", "------", "--------------------",
80	   "-----------", "----------", "----------");
81
82    foreach my $pid (sort { ($reads{$b}{bytes_read} || 0) <=>
83				($reads{$a}{bytes_read} || 0) } keys %reads) {
84	my $comm = $reads{$pid}{comm} || "";
85	my $total_reads = $reads{$pid}{total_reads} || 0;
86	my $bytes_requested = $reads{$pid}{bytes_requested} || 0;
87	my $bytes_read = $reads{$pid}{bytes_read} || 0;
88
89	printf("%6s  %-20s  %10s  %10s  %10s\n", $pid, $comm,
90	       $total_reads, $bytes_requested, $bytes_read);
91    }
92
93    printf("\nfailed reads by pid:\n\n");
94
95    printf("%6s  %20s  %6s  %10s\n", "pid", "comm", "error #", "# errors");
96    printf("%6s  %20s  %6s  %10s\n", "------", "--------------------",
97	   "------", "----------");
98
99    my @errcounts = ();
100
101    foreach my $pid (keys %reads) {
102	foreach my $error (keys %{$reads{$pid}{errors}}) {
103	    my $comm = $reads{$pid}{comm} || "";
104	    my $errcount = $reads{$pid}{errors}{$error} || 0;
105	    push @errcounts, [$pid, $comm, $error, $errcount];
106	}
107    }
108
109    @errcounts = sort { $b->[3] <=> $a->[3] } @errcounts;
110
111    for my $i (0 .. $#errcounts) {
112	printf("%6d  %-20s  %6d  %10s\n", $errcounts[$i][0],
113	       $errcounts[$i][1], $errcounts[$i][2], $errcounts[$i][3]);
114    }
115
116    printf("\nwrite counts by pid:\n\n");
117
118    printf("%6s  %20s  %10s  %10s\n", "pid", "comm",
119	   "# writes", "bytes_written");
120    printf("%6s  %-20s  %10s  %10s\n", "------", "--------------------",
121	   "-----------", "----------");
122
123    foreach my $pid (sort { ($writes{$b}{bytes_written} || 0) <=>
124			($writes{$a}{bytes_written} || 0)} keys %writes) {
125	my $comm = $writes{$pid}{comm} || "";
126	my $total_writes = $writes{$pid}{total_writes} || 0;
127	my $bytes_written = $writes{$pid}{bytes_written} || 0;
128
129	printf("%6s  %-20s  %10s  %10s\n", $pid, $comm,
130	       $total_writes, $bytes_written);
131    }
132
133    printf("\nfailed writes by pid:\n\n");
134
135    printf("%6s  %20s  %6s  %10s\n", "pid", "comm", "error #", "# errors");
136    printf("%6s  %20s  %6s  %10s\n", "------", "--------------------",
137	   "------", "----------");
138
139    @errcounts = ();
140
141    foreach my $pid (keys %writes) {
142	foreach my $error (keys %{$writes{$pid}{errors}}) {
143	    my $comm = $writes{$pid}{comm} || "";
144	    my $errcount = $writes{$pid}{errors}{$error} || 0;
145	    push @errcounts, [$pid, $comm, $error, $errcount];
146	}
147    }
148
149    @errcounts = sort { $b->[3] <=> $a->[3] } @errcounts;
150
151    for my $i (0 .. $#errcounts) {
152	printf("%6d  %-20s  %6d  %10s\n", $errcounts[$i][0],
153	       $errcounts[$i][1], $errcounts[$i][2], $errcounts[$i][3]);
154    }
155
156    print_unhandled();
157}
158
159my %unhandled;
160
161sub print_unhandled
162{
163    if ((scalar keys %unhandled) == 0) {
164	return;
165    }
166
167    print "\nunhandled events:\n\n";
168
169    printf("%-40s  %10s\n", "event", "count");
170    printf("%-40s  %10s\n", "----------------------------------------",
171	   "-----------");
172
173    foreach my $event_name (keys %unhandled) {
174	printf("%-40s  %10d\n", $event_name, $unhandled{$event_name});
175    }
176}
177
178sub trace_unhandled
179{
180    my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
181	$common_pid, $common_comm) = @_;
182
183    $unhandled{$event_name}++;
184}
185