xref: /linux/tools/perf/scripts/perl/rw-by-pid.pl (revision 84abd88a70090cf00f9e45c3a81680874f17626e) 
1#!/usr/bin/perl -w
2# (c) 2009, Tom Zanussi <tzanussi@gmail.com>
3# Licensed under the terms of the GNU GPL License version 2
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} <=>
83			       $reads{$a}{bytes_read}} keys %reads) {
84	my $comm = $reads{$pid}{comm};
85	my $total_reads = $reads{$pid}{total_reads};
86	my $bytes_requested = $reads{$pid}{bytes_requested};
87	my $bytes_read = $reads{$pid}{bytes_read};
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    foreach my $pid (keys %reads) {
100	my $comm = $reads{$pid}{comm};
101	foreach my $err (sort {$reads{$b}{comm} cmp $reads{$a}{comm}}
102			 keys %{$reads{$pid}{errors}}) {
103	    my $errors = $reads{$pid}{errors}{$err};
104
105	    printf("%6d  %-20s  %6d  %10s\n", $pid, $comm, $err, $errors);
106	}
107    }
108
109    printf("\nwrite counts by pid:\n\n");
110
111    printf("%6s  %20s  %10s  %10s\n", "pid", "comm",
112	   "# writes", "bytes_written");
113    printf("%6s  %-20s  %10s  %10s\n", "------", "--------------------",
114	   "-----------", "----------");
115
116    foreach my $pid (sort {$writes{$b}{bytes_written} <=>
117			       $writes{$a}{bytes_written}} keys %writes) {
118	my $comm = $writes{$pid}{comm};
119	my $total_writes = $writes{$pid}{total_writes};
120	my $bytes_written = $writes{$pid}{bytes_written};
121
122	printf("%6s  %-20s  %10s  %10s\n", $pid, $comm,
123	       $total_writes, $bytes_written);
124    }
125
126    printf("\nfailed writes by pid:\n\n");
127
128    printf("%6s  %20s  %6s  %10s\n", "pid", "comm", "error #", "# errors");
129    printf("%6s  %20s  %6s  %10s\n", "------", "--------------------",
130	   "------", "----------");
131
132    foreach my $pid (keys %writes) {
133	my $comm = $writes{$pid}{comm};
134	foreach my $err (sort {$writes{$b}{comm} cmp $writes{$a}{comm}}
135			 keys %{$writes{$pid}{errors}}) {
136	    my $errors = $writes{$pid}{errors}{$err};
137
138	    printf("%6d  %-20s  %6d  %10s\n", $pid, $comm, $err, $errors);
139	}
140    }
141
142    print_unhandled();
143}
144
145my %unhandled;
146
147sub print_unhandled
148{
149    if ((scalar keys %unhandled) == 0) {
150	return;
151    }
152
153    print "\nunhandled events:\n\n";
154
155    printf("%-40s  %10s\n", "event", "count");
156    printf("%-40s  %10s\n", "----------------------------------------",
157	   "-----------");
158
159    foreach my $event_name (keys %unhandled) {
160	printf("%-40s  %10d\n", $event_name, $unhandled{$event_name});
161    }
162}
163
164sub trace_unhandled
165{
166    my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
167	$common_pid, $common_comm) = @_;
168
169    $unhandled{$event_name}++;
170}
171