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 files read/written to for a given program 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 $usage = "perf script -s rw-by-file.pl <comm>\n"; 22 23my $for_comm = shift or die $usage; 24 25my %reads; 26my %writes; 27 28sub syscalls::sys_enter_read 29{ 30 my ($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_write 40{ 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_end 51{ 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_unhandled 82{ 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_unhandled 99{ 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