=head1 SYNOPSIS
- ./bench.pl
+ ./bench.pl [OPTIONS]... BENCHES
+
+=head1 BENCHES
+
+Specify the set of benches to run. I<bench-name> should be one of:
+
+=over 4
+
+=item I<fusion>
+
+Test F<lalr1.cc> with three stacks against F<lalr1-fusion.cc> which
+uses a single one.
+
+=item I<push>
+
+Test the push parser vs. the pull interface. Use the C parser.
+
+=item I<variant>
+
+Test the use of variants instead of union in the C++ parser.
+
+=back
=head1 OPTIONS
=item B<-c>, B<--cflags>=I<flags>
-Flags to pass to the C or C++ compiler.
+Flags to pass to the C or C++ compiler. Defaults to -O2.
+
+=item B<-h>, B<--help>
+
+Display this message and exit succesfully. The more verbose, the more
+details.
=item B<-i>, B<--iterations>=I<integer>
-Say how many times a single test of the bench must be run.
+Say how many times a single test of the bench must be run. If
+negative, specify the minimum number of CPU seconds to run. Defaults
+to -1.
+
+=item B<-q>, B<--quiet>
+
+Decrease the verbosity level (defaults to 1).
=item B<-v>, B<--verbose>
-Raise the verbosity level. Currently only affects B<--help>.
+Raise the verbosity level (defaults to 1).
+
+=back
=cut
+use strict;
use IO::File;
-use Benchmark qw (:all);
+
+##################################################################
+
+=head1 VARIABLES
+
+=over 4
+
+=item C<@bench>
+
+The list of benches to run.
+
+=item C<$bison>
+
+The Bison program to use to compile the grammar.
+
+=item C<$cc>
+
+The C compiler.
+
+=item C<$cxx>
+
+The C++ compiler.
+
+=item C<$cflags>
+
+Compiler flags (C or C++).
+
+=item C<$iterations>
+
+The number of times the parser is run for a bench.
+
+=item C<$verbose>
+
+Verbosity level.
+
+=back
+
+=cut
my $bison = $ENV{'BISON'} || '@abs_top_builddir@/tests/bison';
my $cc = $ENV{'CC'} || 'gcc';
my $cxx = $ENV{'CXX'} || 'g++';
-# Compiler flags (C or C++).
-my $cflags = '';
-# The number of times the parser is run for a bench.
-my $iterations = 50;
+my $cflags = '-O2';
+my $iterations = -1;
+my $verbose = 1;
-##################################################################
+=head1 FUNCTIONS
-=head1 DESCRIPTIONS
+=over 4
-=head2 Functions
+=item C<verbose($level, $message)>
-=over 4
+Report the C<$message> is C<$level> E<lt>= C<$verbose>.
+
+=cut
+
+sub verbose($$)
+{
+ my ($level, $message) = @_;
+ print STDERR $message
+ if $level <= $verbose;
+}
+
+
+######################################################################
=item C<directives($bench, @directive)>
sub directives($@)
{
- my ($bench, @directives) = @_;
+ my ($bench, @directive) = @_;
my $res = "/* Directives for bench `$bench'. */\n";
- for my $d (@directives)
+ for my $d (@directive)
{
$res .= $d . "\n"
unless $d eq '%variant';
return $res;
}
-=item C<triangular_grammar ($base, $max, @directives)>
+######################################################################
+
+=item C<generate_grammar_triangular ($base, $max, @directive)>
Create a large triangular grammar which looks like :
C<$base> is the base name for the file to create (F<$base.y>).
C<$max> is the number of such rules (here, 5). You may pass
-additional Bison C<@directives>.
+additional Bison C<@directive>.
The created parser is self contained: it includes its scanner, and
source of input.
=cut
-sub triangular_grammar ($$$)
+sub generate_grammar_triangular ($$@)
{
- my ($base, $max, @directives) = @_;
- my $directives = directives ($base, @directives);
+ my ($base, $max, @directive) = @_;
+ my $directives = directives ($base, @directive);
my $out = new IO::File ">$base.y"
or die;
}
##################################################################
-=item C<calc_grammar ($base, $max, @directives)>
+
+=item C<generate_grammar_calc ($base, $max, @directive)>
Generate a Bison file F<$base.y> for a calculator parser in C. Pass
-the additional Bison C<@directives>. C<$max> is ignored, but left to
+the additional Bison C<@directive>. C<$max> is ignored, but left to
have the same interface as C<triangular_grammar>.
=cut
-sub calc_grammar ($$$)
+sub generate_grammar_calc ($$@)
{
- my ($base, $max, @directives) = @_;
- my $directives = directives ($base, @directives);
+ my ($base, $max, @directive) = @_;
+ my $directives = directives ($base, @directive);
my $out = new IO::File ">$base.y"
or die;
##################################################################
-=item C<variant_grammar ($base, $max, @directives)>
+=item C<generate_grammar_variant ($base, $max, @directive)>
Generate a Bison file F<$base.y> that uses, or not, the Boost.Variants
-depending on the C<@directives>.
+depending on the C<@directive>.
=cut
-sub variant_grammar ($$$)
+sub generate_grammar_variant ($$@)
{
- my ($base, $max, @directives) = @_;
- my $directives = directives ($base, @directives);
- my $variant = grep { '%variant' } @directives;
+ my ($base, $max, @directive) = @_;
+ my $directives = directives ($base, @directive);
+ my $variant = grep { $_ eq '%variant' } @directive;
my $out = new IO::File ">$base.y"
or die;
print $out <<EOF;
-%debug
%language "C++"
%defines
+$directives
-%code requires // code for the .hh file
+%code requires // variant.h
{
#include <string>
}
-%code // code for the .cc file
+%code // variant.c
{
#include <algorithm>
#include <iostream>
// Prototype of the yylex function providing subsequent tokens.
static yy::parser::token_type yylex(yy::parser::semantic_type* yylval);
-#define STAGE_MAX ($max * 10)
+#define STAGE_MAX ($max * 10) // max = $max
#define USE_VARIANTS $variant
#if USE_VARIANTS
# define IF_VARIANTS(True, False) True
return yy::parser::token::END_OF_FILE;
else if (stage % 2)
{
- IF_VARIANTS(*yylval, yylval->ival) = stage;
+ IF_VARIANTS(yylval->build<int>(), yylval->ival) = stage;
return yy::parser::token::NUMBER;
}
else
{
- IF_VARIANTS(*yylval =, yylval->sval = new) std::string("A string.");
+ IF_VARIANTS(yylval->build<std::string>() =, yylval->sval = new) std::string("A string.");
return yy::parser::token::TEXT;
}
abort();
int main(int argc, char *argv[])
{
yy::parser p;
+#if YYDEBUG
p.set_debug_level(!!getenv("YYDEBUG"));
+#endif
p.parse();
return 0;
}
##################################################################
+=item C<generate_grammar ($name, $base, @directive)>
+
+Generate F<$base.y> by calling C<&generate_grammar_$name>.
+
+=cut
+
+sub generate_grammar ($$@)
+{
+ my ($name, $base, @directive) = @_;
+ verbose 2, "Generating $base.y\n";
+ my %generator =
+ (
+ "calc" => \&generate_grammar_calc,
+ "triangular" => \&generate_grammar_triangular,
+ "variant" => \&generate_grammar_variant,
+ );
+ &{$generator{$name}}($base, 200, @directive);
+}
+
+##################################################################
+
+=item C<run ($command)>
+
+Run, possibly verbosely, the shell C<$command>.
+
+=cut
+
+sub run ($)
+{
+ my ($command) = @_;
+ verbose 2, "$command\n";
+ system ("$command") == 0
+ or die "$command failed";
+}
+
+##################################################################
+
=item C<compile ($base)>
Compile C<$base.y> to an executable C, Using the C or C++ compiler
my $compiler = $language eq 'C++' ? $cxx : $cc;
- system ("$bison $base.y -o $base.c") == 0
- or die;
- system ("$compiler -o $base $cflags $base.c") == 0
- or die;
+ run "$bison $base.y -o $base.c";
+ run "$compiler -o $base $cflags $base.c";
}
+######################################################################
+
=item C<bench_grammar ($gram, %bench)>
Generate benches for C<$gram>. C<$gram> should be C<calc> or
C<triangle>. C<%bench> is a hash of the form:
- $name => @directives
+ $name => @directive
-where C<$name> is the name of the bench, and C<@directives> are the
+where C<$name> is the name of the bench, and C<@directive> are the
Bison directive to use for this bench. All the benches are compared
against each other, repeated 50 times.
{
my ($gram, %test) = @_;
+ use Benchmark qw (:all :hireswallclock);
+
# Set up the benches as expected by timethese.
my %bench;
+ # For each bench, capture the size.
+ my %size;
while (my ($name, $directives) = each %test)
{
- print STDERR "$name\n";
- # Call the Bison input file generator.
- my $generator = "$gram" . "_grammar";
- &$generator ($name, 200, @$directives);
+ generate_grammar ($gram, $name, @$directives);
+ # Compile the executable.
compile ($name);
$bench{$name} = "system ('./$name');";
+ chop($size{$name} = `wc -c <$name`);
}
- print "$gram:\n";
# Run the benches.
+ #
+ # STYLE can be any of 'all', 'none', 'noc', 'nop' or 'auto'. 'all'
+ # shows each of the 5 times available ('wallclock' time, user time,
+ # system time, user time of children, and system time of
+ # children). 'noc' shows all except the two children times. 'nop'
+ # shows only wallclock and the two children times. 'auto' (the
+ # default) will act as 'all' unless the children times are both
+ # zero, in which case it acts as 'noc'. 'none' prevents output.
+ verbose 2, "Running the benches for $gram\n";
my $res = timethese ($iterations, \%bench, 'nop');
- # Output the result.
+
+ # Output the speed result.
cmpthese ($res, 'nop');
+
+ # Display the sizes.
+ print "Sizes (decreasing):\n";
+ my $width = 10;
+ for my $bench (keys %size)
+ {
+ $width = length $bench
+ if $width < length $bench;
+ }
+ # Benches sorted by decreasing size.
+ my @benches_per_size = sort {$size{$b} <=> $size{$a}} keys %size;
+ for my $bench (@benches_per_size)
+ {
+ printf "%${width}s: %5.2fkB\n", $bench, $size{$bench} / 1024;
+ }
}
+######################################################################
=item C<bench_push_parser ()>
);
}
+######################################################################
+
=item C<bench_variant_parser ()>
Bench the C++ lalr1.cc parser using Boost.Variants or %union.
bench_grammar
('variant',
(
- "union" => [],
- "variant" => ['%variant'],
+ "f-union" => ['%skeleton "lalr1-fusion.cc"'],
+ "f-uni-deb" => ['%skeleton "lalr1-fusion.cc"', '%debug'],
+ "f-var" => ['%skeleton "lalr1-fusion.cc"', '%variant'],
+ "f-var-deb" => ['%skeleton "lalr1-fusion.cc"', '%debug', '%variant'],
+ "f-var-dtr" => ['%skeleton "lalr1-fusion.cc"', '%variant', "%code {\n#define VARIANT_DESTROY\n}"],
+ "f-var-deb-dtr" => ['%skeleton "lalr1-fusion.cc"', '%debug', '%variant', "%code {\n#define VARIANT_DESTROY\n}"],
+ )
+ );
+}
+
+######################################################################
+
+=item C<bench_fusion_parser ()>
+
+Bench the C++ lalr1.cc parser using Boost.Variants or %union.
+
+=cut
+
+sub bench_fusion_parser ()
+{
+ bench_grammar
+ ('variant',
+ (
+ "split" => [],
+ "fused" => ['%skeleton "lalr1-fusion.cc"'],
)
);
}
-output => \*STDOUT });
}
+######################################################################
+
sub getopt ()
{
use Getopt::Long;
- my $verbose = 0;
- %option = ("h|help" => sub { help ($verbose) },
- "v|verbose" => sub { ++$verbose },
- "c|cflags=s" => \$cflags,
- "i|iterations=i" => \$iterations);
+ my %option = (
+ "c|cflags=s" => \$cflags,
+ "h|help" => sub { help ($verbose) },
+ "i|iterations=i" => \$iterations,
+ "q|quiet" => sub { --$verbose },
+ "v|verbose" => sub { ++$verbose },
+ );
Getopt::Long::Configure ("bundling", "pass_through");
GetOptions (%option)
or exit 1;
######################################################################
getopt;
-print STDERR "Using bison=$bison, cc=$cc, cxx=$cxx, cflags=$cflags.\n";
-# bench_push_parser();
-bench_variant_parser();
+verbose 1, "Using bison=$bison.\n";
+verbose 1, "Using cc=$cc.\n";
+verbose 1, "Using cxx=$cxx.\n";
+verbose 1, "Using cflags=$cflags.\n";
+
+for my $b (@ARGV)
+{
+ verbose 1, "Running benchmark $b.\n";
+ bench_fusion_parser() if $b eq "fusion";
+ bench_push_parser() if $b eq "push";
+ bench_variant_parser() if $b eq "variant";
+}
### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
projects / bison.git / blobdiff