1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
#!/usr/bin/perl -w
# SPDX-License-Identifier: GPL-2.0-only
# (c) 2009, Tom Zanussi <tzanussi@gmail.com>
# Display r/w activity for files read/written to for a given program
# 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 $usage = "perf script -s rw-by-file.pl <comm>\n";
my $for_comm = shift or die $usage;
my %reads;
my %writes;
sub syscalls::sys_enter_read
{
my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
$common_pid, $common_comm, $nr, $fd, $buf, $count) = @_;
if ($common_comm eq $for_comm) {
$reads{$fd}{bytes_requested} += $count;
$reads{$fd}{total_reads}++;
}
}
sub syscalls::sys_enter_write
{
my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
$common_pid, $common_comm, $nr, $fd, $buf, $count) = @_;
if ($common_comm eq $for_comm) {
$writes{$fd}{bytes_written} += $count;
$writes{$fd}{total_writes}++;
}
}
sub trace_end
{
printf("file read counts for $for_comm:\n\n");
printf("%6s %10s %10s\n", "fd", "# reads", "bytes_requested");
printf("%6s %10s %10s\n", "------", "----------", "-----------");
foreach my $fd (sort {$reads{$b}{bytes_requested} <=>
$reads{$a}{bytes_requested}} keys %reads) {
my $total_reads = $reads{$fd}{total_reads};
my $bytes_requested = $reads{$fd}{bytes_requested};
printf("%6u %10u %10u\n", $fd, $total_reads, $bytes_requested);
}
printf("\nfile write counts for $for_comm:\n\n");
printf("%6s %10s %10s\n", "fd", "# writes", "bytes_written");
printf("%6s %10s %10s\n", "------", "----------", "-----------");
foreach my $fd (sort {$writes{$b}{bytes_written} <=>
$writes{$a}{bytes_written}} keys %writes) {
my $total_writes = $writes{$fd}{total_writes};
my $bytes_written = $writes{$fd}{bytes_written};
printf("%6u %10u %10u\n", $fd, $total_writes, $bytes_written);
}
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}++;
}
|
