65 lines
1.6 KiB
Perl
65 lines
1.6 KiB
Perl
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#!/usr/bin/perl
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#
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# benchmark-cpu.pl: benchmark CPU optimizations of mpg123
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#
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# initially written by Nicholas J Humfrey <njh@aelius.com>, placed in the public domain
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#
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use strict;
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#use Time::HiRes qw/time/;
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my $MPG123_CMD = shift @ARGV;
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my @TEST_FILES = @ARGV;
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die "Please specify full path to mpg123 >= 1.7.0 and a test MP3 file to decode" if (scalar(@ARGV) < 1);
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die "mpg123 command does not exist" unless (-e $MPG123_CMD);
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die "mpg123 command is not executable" unless (-x $MPG123_CMD);
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for(@TEST_FILES)
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{
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die "test MP3 file does not exist" unless (-e $_);
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}
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# Force unbuffed output on STDOUT
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#$|=1; # why?
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# Check the CPUs available
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my $cpulist = `$MPG123_CMD --test-cpu`;
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chomp( $cpulist );
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die "Failed to get list of available CPU optimizations" unless ($cpulist =~ s/^Supported decoders: //);
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my @cpus = split( / /, $cpulist );
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my @encs = qw(s16 f32);
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printf STDERR ("Found %d CPU optimizations to test...\n\n", scalar(@cpus) );
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print "#mpg123 benchmark (user CPU time in seconds for decoding)\n";
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print "#decoder";
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for(@encs){ print " t_$_/s"; }
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print "\n";
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my $allret = 0;
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foreach my $cpu (@cpus)
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{
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print "$cpu";
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foreach my $e (@encs)
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{
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# using user CPU time
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my @start_time = times();
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my $ret = system($MPG123_CMD, '-q', '--cpu', $cpu, '-e', $e, '-t', @TEST_FILES );
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my @end_time = times();
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my $runtime = $end_time[2] - $start_time[2];
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if($ret)
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{
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print STDERR "Execution of $MPG123_CMD failed with code $ret!\n";
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$runtime = 0;
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$allret = 1;
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}
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# third entry is child user time
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printf(" %4.2f", $runtime);
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}
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print("\n");
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}
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exit($allret);
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