107 lines
2.8 KiB
Perl
107 lines
2.8 KiB
Perl
#!/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}++;
|
|
}
|
|
|
|
|