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1#!/usr/bin/perl -w2# SPDX-License-Identifier: GPL-2.0-only3# (c) 2009, Tom Zanussi <tzanussi@gmail.com>4 5# Display r/w activity for files read/written to for a given program6 7# The common_* event handler fields are the most useful fields common to8# all events. They don't necessarily correspond to the 'common_*' fields9# in the status files. Those fields not available as handler params can10# 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 $usage = "perf script -s rw-by-file.pl <comm>\n";22 23my $for_comm = shift or die $usage;24 25my %reads;26my %writes;27 28sub syscalls::sys_enter_read29{30 my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,31 $common_pid, $common_comm, $common_callchain, $nr, $fd, $buf, $count) = @_;32 33 if ($common_comm eq $for_comm) {34 $reads{$fd}{bytes_requested} += $count;35 $reads{$fd}{total_reads}++;36 }37}38 39sub syscalls::sys_enter_write40{41 my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,42 $common_pid, $common_comm, $common_callchain, $nr, $fd, $buf, $count) = @_;43 44 if ($common_comm eq $for_comm) {45 $writes{$fd}{bytes_written} += $count;46 $writes{$fd}{total_writes}++;47 }48}49 50sub trace_end51{52 printf("file read counts for $for_comm:\n\n");53 54 printf("%6s %10s %10s\n", "fd", "# reads", "bytes_requested");55 printf("%6s %10s %10s\n", "------", "----------", "-----------");56 57 foreach my $fd (sort {$reads{$b}{bytes_requested} <=>58 $reads{$a}{bytes_requested}} keys %reads) {59 my $total_reads = $reads{$fd}{total_reads};60 my $bytes_requested = $reads{$fd}{bytes_requested};61 printf("%6u %10u %10u\n", $fd, $total_reads, $bytes_requested);62 }63 64 printf("\nfile write counts for $for_comm:\n\n");65 66 printf("%6s %10s %10s\n", "fd", "# writes", "bytes_written");67 printf("%6s %10s %10s\n", "------", "----------", "-----------");68 69 foreach my $fd (sort {$writes{$b}{bytes_written} <=>70 $writes{$a}{bytes_written}} keys %writes) {71 my $total_writes = $writes{$fd}{total_writes};72 my $bytes_written = $writes{$fd}{bytes_written};73 printf("%6u %10u %10u\n", $fd, $total_writes, $bytes_written);74 }75 76 print_unhandled();77}78 79my %unhandled;80 81sub print_unhandled82{83 if ((scalar keys %unhandled) == 0) {84 return;85 }86 87 print "\nunhandled events:\n\n";88 89 printf("%-40s %10s\n", "event", "count");90 printf("%-40s %10s\n", "----------------------------------------",91 "-----------");92 93 foreach my $event_name (keys %unhandled) {94 printf("%-40s %10d\n", $event_name, $unhandled{$event_name});95 }96}97 98sub trace_unhandled99{100 my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,101 $common_pid, $common_comm, $common_callchain) = @_;102 103 $unhandled{$event_name}++;104}105 106 107