350 lines
8.4 KiB
Perl
350 lines
8.4 KiB
Perl
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#!/usr/local/bin/perl
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#
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# sprofalyze.pl
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#
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# Analyzes the output files created by the profile command for
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# Statistical Profiling.
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#
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# Changes:
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# 14 Aug, 2006 Created (Rogier Meurs)
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#
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# Configuration options:
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# Location and parameters of nm program to extract symbol tables
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$nm = "/usr/bin/nm -dn";
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# Location of src (including trailing /)
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$src_root = qw(
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/usr/src/
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);
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# Location of system executables within src. Add new servers/drivers here.
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@exes = qw(
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kernel/kernel
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servers/ds/ds
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servers/vfs/vfs
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servers/mfs/mfs
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servers/inet/inet
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servers/is/is
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servers/pm/pm
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servers/rs/rs
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servers/rs/service
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drivers/at_wini/at_wini
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drivers/bios_wini/bios_wini
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drivers/cmos/cmos
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drivers/dp8390/dp8390
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drivers/dpeth/dpeth
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drivers/floppy/floppy
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drivers/fxp/fxp
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drivers/lance/lance
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drivers/log/log
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drivers/memory/memory
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drivers/pci/pci
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drivers/printer/printer
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drivers/random/random
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drivers/rtl8139/rtl8139
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drivers/sb16/sb16_dsp
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drivers/sb16/sb16_mixer
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drivers/ti1225/ti1225
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drivers/tty/tty
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);
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# 8< ----------- no user configurable parameters below this line ----------- >8
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$SAMPLE_SIZE = 12;
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$MINIMUM_PERC = 1.0;
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if ($#ARGV < 0 || process_args(@ARGV)) {
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print "Usage:\n";
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print " sprofalyze.pl [-p percentage] file ...\n\n";
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print " percentage print only processes/functions >= percentage\n";
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exit 1;
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}
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sub process_args {
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$_ = shift;
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if (/^-p$/) {
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$_ = shift;
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return 1 unless /^(\d{1,2})(.\d+)?$/;
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$MINIMUM_PERC = $1 + $2;
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} else {
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unshift @_, $_;
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}
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@files = @_;
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return 1 unless @files > 0;
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return 0;
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}
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if (read_symbols()) { exit 1; }
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print "Showing processes and functions using at least $MINIMUM_PERC% time.\n";
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foreach $file (@files) {
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if (process_datafile($file)) { exit 1; }
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}
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exit 0;
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sub read_symbols
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{
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print "Building indexes from symbol tables:";
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for ($i=0; $i<= $#exes; $i++) {
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my $exe = @exes[$i];
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$shortname = $exe;
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$shortname =~ s/^.*\///;
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print " " if $i <= $#exes;
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print $shortname;
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$fullname = $src_root . $exe;
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if ((! -x $fullname) || (! -r $fullname)) {
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print "\nERROR: $fullname does not exist or not readable.\n";
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print "Did you do a make?\n";
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return 1;
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}
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# Create a hash entry for each symbol table (text) entry.
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foreach $_ (`$nm $fullname`) {
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if (/^0{0,7}(\d{0,8})\s[tT]\s(\w{1,8})\n$/) {
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${$shortname."_hash"}{$1} = $2;
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}
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}
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# Create hash entries for every possible pc value. This will pay off.
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@lines = sort { $a <=> $b } keys %{$shortname."_hash"};
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for ($y = 0; $y <= $#lines; $y++) {
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for ($z = @lines->[$y] + 1; $z < @lines->[$y + 1]; $z++) {
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${$shortname."_hash"}{$z} =
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${$shortname."_hash"}{@lines->[$y]}
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}
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}
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}
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# Clock and system are in kernel image but are seperate processes.
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push(@exes, "clock");
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push(@exes, "system");
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%clock_hash = %kernel_hash;
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%system_hash = %kernel_hash;
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print ".\n\n";
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return 0;
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}
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sub process_datafile
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{
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my %res = ();
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my %merged = ();
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my $file = shift;
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my $buf, $pc, $exe, $total_system_perc;
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unless (open(FILE, $file)) {
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print "\nERROR: Unable to open $file: $!\n";
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return 0;
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}
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# First line: check file type.
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$_ = <FILE>; chomp;
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if (!/^stat$/) {
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if (/^call$/) {
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print "Call Profiling output file: ";
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print "Use cprofalyze.pl instead.\n";
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} else {
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print "Not a profiling output file.\n";
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}
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return 0;
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}
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$file =~ s/^.*\///;
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printf "\n========================================";
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printf "========================================\n";
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printf("Data file: %s\n", $file);
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printf "========================================";
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printf "========================================\n\n";
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# Read header with total, idle, system and user hits.
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$_ = <FILE>;
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chomp;
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($total_hits, $idle_hits, $system_hits, $user_hits) = split (/ /);
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my $system_perc = sprintf("%3.f", $system_hits / $total_hits * 100);
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my $user_perc = sprintf("%3.f", $user_hits / $total_hits * 100);
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my $idle_perc = 100 - $system_perc - $user_perc;
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printf(" System process ticks: %10d (%3d%%)\n", $system_hits, $system_perc);
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printf(" User process ticks: %10d (%3d%%)", $user_hits, $user_perc);
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printf(" Details of system process\n");
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printf(" Idle time ticks: %10d (%3d%%)", $idle_hits, $idle_perc);
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printf(" samples, aggregated and\n");
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printf(" ---------- ----");
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printf(" per process, are below.\n");
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printf(" Total ticks: %10d (100%)\n\n", $total_hits);
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# Read sample records from file and increase relevant counters.
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until (eof(FILE)) {
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read(FILE, $buf, $SAMPLE_SIZE) == $SAMPLE_SIZE or die ("Short read.");
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($exe, $pc) = unpack("Z8i", $buf);
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# p_name "mem" refers to executable "memory".
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$exe =~ s/^mem/memory/;
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# We can access the hash by pc because they are all in there.
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if (!defined(${$exe."_hash"}{$pc})) {
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print "ERROR: Undefined in symbol table indexes: ";
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print "executable $exe address $pc\n";
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print "Did you include this executable in the configuration?\n";
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return 1;
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}
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$res{$exe}{${$exe."_hash"}{$pc}} ++;
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}
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# We only need to continue with executables that had any hits.
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my @actives = ();
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foreach my $exe (@exes) {
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$exe =~ s/^.*\///;
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next if (!exists($res{$exe}));
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push(@actives, $exe);
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}
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# Calculate number of samples for each executable and create aggregated hash.
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%exe_hits = ();
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foreach $exe (@actives) {
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foreach my $hits (values %{$res{$exe}}) {
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$exe_hits{$exe} += $hits;
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}
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foreach my $key (keys %{$res{$exe}}) {
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$merged{sprintf("%8s %8s", $exe, $key)} = $res{$exe}{$key};
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}
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}
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$total_system_perc = 0;
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# Print the aggregated results.
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process_hash("", \%merged);
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# Print results for each executable in decreasing order.
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foreach my $exe
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(reverse sort { $exe_hits{$a} <=> $exe_hits{$b} } keys %exe_hits)
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{
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process_hash($exe, \%{$res{$exe}}) if
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$exe_hits{$exe} >= $system_hits / 100 * $MINIMUM_PERC;
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}
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# Print total of processes <threshold.
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printf "----------------------------------------";
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printf "----------------------------------------\n";
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printf("%-47s %5.1f%% of system process samples\n",
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"processes <$MINIMUM_PERC% (not showing functions)",
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100 - $total_system_perc);
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printf "----------------------------------------";
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printf "----------------------------------------\n";
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printf("%-47s 100.0%%\n\n", "total");
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close(FILE);
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return 0;
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}
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sub process_hash
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{
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my $exe = shift;
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my $ref = shift;
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%hash = %{$ref};
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my $aggr = $exe eq "";
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# Print a header.
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printf "----------------------------------------";
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printf "----------------------------------------\n";
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if ($aggr) {
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$astr_max = 55;
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$perc_hits = $system_hits / 100;
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printf("Total system process time %46d samples\n", $system_hits);
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} else {
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$astr_max = 64;
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$perc_hits = $exe_hits{$exe} / 100;
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$total_system_perc += $exe_perc =
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sprintf("%5.1f", $exe_hits{$exe} / $system_hits * 100);
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printf("%-47s %5.1f%% of system process samples\n", $exe, $exe_perc);
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}
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printf "----------------------------------------";
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printf "----------------------------------------\n";
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# Delete functions <threshold. Get percentage for all functions >threshold.
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my $below_thres_hits;
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my $total_exe_perc;
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foreach my $func (keys %hash)
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{
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if ($hash{$func} < $perc_hits * $MINIMUM_PERC) {
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$below_thres_hits += $hash{$func};
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delete($hash{$func});
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} else {
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$total_exe_perc += sprintf("%3.1f", $hash{$func} / $perc_hits);
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}
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}
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# Now print the hash entries in decreasing order.
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@sorted = reverse sort { $hash{$a} <=> $hash{$b} } keys %hash;
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$astr_hits = ($hash{@sorted->[0]} > $below_thres_hits ?
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$hash{@sorted->[0]} : $below_thres_hits) / $astr_max;
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foreach $func (@sorted) {
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process_line($func, $hash{$func});
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}
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# Print <threshold hits.
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my $below_thres;
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if ($aggr) { $below_thres = " "; }
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$below_thres .= sprintf("%8s", "<" . $MINIMUM_PERC . "%");
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process_line($below_thres, $below_thres_hits, 100 - $total_exe_perc);
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# Print footer.
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printf "----------------------------------------";
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printf "----------------------------------------\n";
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printf("%-73s 100.0%%\n\n", $aggr ? "total" : $exe);
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}
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sub process_line
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{
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my $func = shift;
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my $hits = shift;
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my $perc = $hits / $perc_hits;
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my $astr = $hits / $astr_hits;
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if ($aggr) {
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print "$func ";
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} else {
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printf("%8s ", $func);
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}
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for ($i = 0; $i < $astr_max; $i++) {
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if ($i <= $astr) {
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print "*";
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} else {
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print " ";
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}
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}
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print " ";
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if (my $rest = shift) {
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printf("%5.1f%%\n", $rest);
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} else {
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printf("%5.1f%%\n", $perc);
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}
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}
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