Benchmark.pm.svn-base
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- #########################################################################
- # OpenKore - Performance benchmarking
- # Copyright (c) 2006 OpenKore Team
- #
- # This software is open source, licensed under the GNU General Public
- # License, version 2.
- # Basically, this means that you're allowed to modify and distribute
- # this software. However, if you distribute modified versions, you MUST
- # also distribute the source code.
- # See http://www.gnu.org/licenses/gpl.html for the full license.
- #
- # $Revision: 4306 $
- # $Id: Item.pm 4306 2006-04-20 18:06:46Z hongli $
- #
- #########################################################################
- ##
- # MODULE DESCRIPTION: Performance benchmarking
- #
- # This module allows you to benchmark Perl code. You use it as follows:
- # <pre class="example">
- # use Utils::Benchmark;
- # use Carp::Assert; # Very important! This gives you the DEBUG constant.
- #
- # sub foo {
- # ... do something ...
- # }
- #
- # sub bar {
- # ... do something ...
- # }
- #
- # Benchmark::begin("Total") if DEBUG;
- #
- # Benchmark::begin("foo") if DEBUG;
- # foo();
- # Benchmark::end("foo") if DEBUG;
- #
- # Benchmark::begin("bar") if DEBUG;
- # bar();
- # Benchmark::end("bar") if DEBUG;
- #
- # Benchmark::end("Total") if DEBUG;
- # print Benchmark::results() if DEBUG;
- # </pre>
- #
- # You should always put "if DEBUG" after every Benchmark method call. That allows
- # you to disable benchmarking if the NDEBUG environment variable is set, which
- # will eliminate benchmarking overhead. Since DEBUG is a constant, Perl will compile
- # out the Benchmarking code at compile time if DEBUG evaluates to false.
- # See also <a href="http://cpan.uwinnipeg.ca/htdocs/Carp-Assert/Carp/Assert.html#efficiency">Carp::Assert's documentation.</a>
- package Benchmark;
- use strict;
- use Time::HiRes;
- use Modules 'register';
- use XSTools;
- XSTools::bootModule('Utils::Benchmark');
- init();
- # Note that some functions are implemented in src/auto/XSTools/utils/perl/Benchmark.xs
- ##
- # void Benchmark::begin(String domain)
- # domain: A unique name for the piece of code you're benchmarking.
- # Requires: defined($domain)
- #
- # Begin measuring the time that a piece of code will take.
- ##
- # void Benchmark::end(String domain)
- # domain: A unique name for the piece of code you're benchmarking.
- # Requires: defined($domain)
- #
- # End measuring the time that a piece of code took.
- sub percent {
- my ($part, $total) = @_;
- if ($total == 0) {
- return '-';
- } else {
- return sprintf("%.2f%%", $part / $total * 100);
- }
- }
- ##
- # String Benchmark::results(String relativeTo)
- # relativeTo: The domain with which percentages are calculated.
- # Requires: defined($relativeTo)
- # Ensures: defined(result)
- #
- # Returns a string which contains the benchmarking results.
- sub results {
- my ($relativeTo) = @_;
- my $results = getResults();
- my ($result, $totalCPU, $totalReal);
- $result = sprintf "%-30s %-23s %-23sn", "Domain", "CPU", "Real";
- $result .= "------------------------------------------------------------------------n";
- $totalCPU = clock2msec($results->{$relativeTo}{clock});
- $totalReal = $results->{$relativeTo}{realTime};
- my $sortFunc = sub($$) {
- my ($a, $b) = @_;
- if ($a eq $relativeTo) {
- return -1;
- } elsif ($b eq $relativeTo) {
- return 1;
- } else {
- return lc($a) cmp lc($b);
- }
- };
- foreach my $domain (sort $sortFunc keys(%{$results})) {
- my $item = $results->{$domain};
- $result .= sprintf "%-30s %-23s %-23sn",
- $domain,
- sprintf("%.3f (%s)", clock2msec($item->{clock}), percent(clock2msec($item->{clock}), $totalCPU)),
- sprintf("%.3f (%s)", $item->{realTime}, percent($item->{realTime}, $totalReal));
- }
- return $result;
- }
- 1;