minix/commands/profile/sprofalyze.pl

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Perl
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2010-09-17 10:09:04 +02:00
#!/usr/pkg/bin/perl
#
# sprofalyze.pl
#
# Analyzes the output files created by the profile command for
# Statistical Profiling.
#
# Changes:
# 14 Aug, 2006 Created (Rogier Meurs)
#
# Configuration options:
# Location and parameters of nm program to extract symbol tables
$nm = "/usr/pkg/bin/nm --radix=d -n";
# Location of src (including trailing /)
$src_root = qw(
/usr/src/
);
# Location of system executables within src. Add new servers/drivers here.
# This should be replaced with something less maintenance-prone some day.
@exes = qw(
kernel/kernel
servers/ds/ds
servers/hgfs/hgfs
servers/inet/inet
servers/ipc/ipc
servers/is/is
servers/iso9660fs/isofs
servers/mfs/mfs
servers/pfs/pfs
servers/pm/pm
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servers/procfs/procfs
servers/rs/rs
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servers/sched/sched
servers/vfs/vfs
servers/vm/vm
servers/sched/sched
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commands/service/service
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drivers/ahci/ahci
drivers/acpi/acpi
drivers/amddev/amddev
drivers/at_wini/at_wini
drivers/atl2/atl2
drivers/audio/es1370/es1370
drivers/audio/es1371/es1371
drivers/bios_wini/bios_wini
drivers/dec21140A/dec21140A
drivers/dp8390/dp8390
drivers/dpeth/dpeth
drivers/e1000/e1000
drivers/fbd/fbd
drivers/filter/filter
drivers/floppy/floppy
drivers/fxp/fxp
drivers/lance/lance
drivers/log/log
drivers/memory/memory
drivers/orinoco/orinoco
drivers/pci/pci
drivers/printer/printer
drivers/random/random
drivers/rtl8139/rtl8139
drivers/rtl8169/rtl8169
drivers/ti1225/ti1225
drivers/tty/tty
drivers/vbox/vbox
);
# 8< ----------- no user configurable parameters below this line ----------- >8
$SAMPLE_SIZE = 12;
$MINIMUM_PERC = 1.0;
if ($#ARGV < 0 || process_args(@ARGV)) {
print "Usage:\n";
print " sprofalyze.pl [-p percentage] file ...\n\n";
print " percentage print only processes/functions >= percentage\n";
exit 1;
}
sub process_args {
$_ = shift;
if (/^-p$/) {
$_ = shift;
return 1 unless /^(\d{1,2})(.\d+)?$/;
$MINIMUM_PERC = $1 + $2;
} else {
unshift @_, $_;
}
@files = @_;
return 1 unless @files > 0;
return 0;
}
if (read_symbols()) { exit 1; }
print "Showing processes and functions using at least $MINIMUM_PERC% time.\n";
foreach $file (@files) {
if (process_datafile($file)) { exit 1; }
}
exit 0;
sub short_name
{
my $shortname = shift;
$shortname =~ s/^.*\///;
return substr($shortname, 0, 7);
}
sub read_symbols
{
print "Building indexes from symbol tables:";
for ($i=0; $i<= $#exes; $i++) {
my $exe = @exes[$i];
$shortname = $exe;
$shortname =~ s/^.*\///;
print " " if $i <= $#exes;
print $shortname;
$shortname = short_name($exe);
$fullname = $src_root . $exe;
if ((! -x $fullname) || (! -r $fullname)) {
print "\nWARNING: $fullname does not exist or not readable.\n";
print "Did you do a make?\n";
next;
}
# Create a hash entry for each symbol table (text) entry.
foreach $_ (`$nm $fullname`) {
if (/^0{0,7}(\d{0,10})\s[tT]\s(\w{1,32})\n$/) {
${$shortname."_hash"}{$1} = $2;
}
}
# Create hash entries for every possible pc value. This will pay off.
@lines = sort { $a <=> $b } keys %{$shortname."_hash"};
for ($y = 0; $y <= $#lines; $y++) {
for ($z = @lines->[$y] + 1; $z < @lines->[$y + 1]; $z++) {
${$shortname."_hash"}{$z} =
${$shortname."_hash"}{@lines->[$y]}
}
}
}
# Clock and system are in kernel image but are seperate processes.
push(@exes, "clock");
push(@exes, "system");
%clock_hash = %kernel_hash;
%system_hash = %kernel_hash;
print ".\n\n";
return 0;
}
sub process_datafile
{
my %res = ();
my %merged = ();
my $file = shift;
my $buf, $pc, $exe, $total_system_perc;
unless (open(FILE, $file)) {
print "\nERROR: Unable to open $file: $!\n";
return 0;
}
# First line: check file type.
$_ = <FILE>; chomp;
if (!/^stat$/) {
if (/^call$/) {
print "Call Profiling output file: ";
print "Use cprofalyze.pl instead.\n";
} else {
print "Not a profiling output file.\n";
}
return 0;
}
$file =~ s/^.*\///;
printf "\n========================================";
printf "========================================\n";
printf("Data file: %s\n", $file);
printf "========================================";
printf "========================================\n\n";
# Read header with total, idle, system and user hits.
$_ = <FILE>;
chomp;
($total_hits, $idle_hits, $system_hits, $user_hits) = split (/ /);
my $system_perc = sprintf("%3.f", $system_hits / $total_hits * 100);
my $user_perc = sprintf("%3.f", $user_hits / $total_hits * 100);
my $idle_perc = 100 - $system_perc - $user_perc;
printf(" System process ticks: %10d (%3d%%)\n", $system_hits, $system_perc);
printf(" User process ticks: %10d (%3d%%)", $user_hits, $user_perc);
printf(" Details of system process\n");
printf(" Idle time ticks: %10d (%3d%%)", $idle_hits, $idle_perc);
printf(" samples, aggregated and\n");
printf(" ---------- ----");
printf(" per process, are below.\n");
printf(" Total ticks: %10d (100%)\n\n", $total_hits);
# Read sample records from file and increase relevant counters.
until (eof(FILE)) {
read(FILE, $buf, $SAMPLE_SIZE) == $SAMPLE_SIZE or die ("Short read.");
($exe, $pc) = unpack("Z8i", $buf);
# The kernel mangles process names for debugging purposes.
# We compensate for that here.
$exe =~ s/\*F$//;
# We can access the hash by pc because they are all in there.
if (!defined(${$exe."_hash"}{$pc})) {
print "ERROR: Undefined in symbol table indexes: ";
print "executable $exe address $pc\n";
print "Did you include this executable in the configuration?\n";
return 1;
}
$res{$exe}{${$exe."_hash"}{$pc}} ++;
}
# We only need to continue with executables that had any hits.
my @actives = ();
foreach my $exe (@exes) {
$exe = short_name($exe);
next if (!exists($res{$exe}));
push(@actives, $exe);
}
# Calculate number of samples for each executable and create aggregated hash.
%exe_hits = ();
foreach $exe (@actives) {
foreach my $hits (values %{$res{$exe}}) {
$exe_hits{$exe} += $hits;
}
foreach my $key (keys %{$res{$exe}}) {
$merged{sprintf("%8s %32s", $exe, $key)} = $res{$exe}{$key};
}
}
$total_system_perc = 0;
# Print the aggregated results.
process_hash("", \%merged);
# Print results for each executable in decreasing order.
foreach my $exe
(reverse sort { $exe_hits{$a} <=> $exe_hits{$b} } keys %exe_hits)
{
process_hash($exe, \%{$res{$exe}}) if
$exe_hits{$exe} >= $system_hits / 100 * $MINIMUM_PERC;
}
# Print total of processes <threshold.
printf "----------------------------------------";
printf "----------------------------------------\n";
printf("%-47s %5.1f%% of system process samples\n",
"processes <$MINIMUM_PERC% (not showing functions)",
100 - $total_system_perc);
printf "----------------------------------------";
printf "----------------------------------------\n";
printf("%-47s 100.0%%\n\n", "total");
close(FILE);
return 0;
}
sub process_hash
{
my $exe = shift;
my $ref = shift;
%hash = %{$ref};
my $aggr = $exe eq "";
# Print a header.
printf "----------------------------------------";
printf "----------------------------------------\n";
if ($aggr) {
$astr_max = 31;
$perc_hits = $system_hits / 100;
printf("Total system process time %46d samples\n", $system_hits);
} else {
$astr_max = 40;
$perc_hits = $exe_hits{$exe} / 100;
$total_system_perc += $exe_perc =
sprintf("%5.1f", $exe_hits{$exe} / $system_hits * 100);
printf("%-47s %5.1f%% of system process samples\n", $exe, $exe_perc);
}
printf "----------------------------------------";
printf "----------------------------------------\n";
# Delete functions <threshold. Get percentage for all functions >threshold.
my $below_thres_hits;
my $total_exe_perc;
foreach my $func (keys %hash)
{
if ($hash{$func} < $perc_hits * $MINIMUM_PERC) {
$below_thres_hits += $hash{$func};
delete($hash{$func});
} else {
$total_exe_perc += sprintf("%3.1f", $hash{$func} / $perc_hits);
}
}
# Now print the hash entries in decreasing order.
@sorted = reverse sort { $hash{$a} <=> $hash{$b} } keys %hash;
$astr_hits = ($hash{@sorted->[0]} > $below_thres_hits ?
$hash{@sorted->[0]} : $below_thres_hits) / $astr_max;
foreach $func (@sorted) {
process_line($func, $hash{$func});
}
# Print <threshold hits.
my $below_thres;
if ($aggr) { $below_thres = " "; }
$below_thres .= sprintf("%8s", "<" . $MINIMUM_PERC . "%");
process_line($below_thres, $below_thres_hits, 100 - $total_exe_perc);
# Print footer.
printf "----------------------------------------";
printf "----------------------------------------\n";
printf("%-73s 100.0%%\n\n", $aggr ? "total" : $exe);
}
sub process_line
{
my $func = shift;
my $hits = shift;
my $perc = $hits / $perc_hits;
my $astr = $hits / $astr_hits;
if ($aggr) {
print "$func ";
} else {
printf("%32s ", $func);
}
for ($i = 0; $i < $astr_max; $i++) {
if ($i <= $astr) {
print "*";
} else {
print " ";
}
}
print " ";
if (my $rest = shift) {
printf("%5.1f%%\n", $rest);
} else {
printf("%5.1f%%\n", $perc);
}
}