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package Perf::Trace::Util;
use 5.010000;
use strict;
use warnings;
require Exporter;
our @ISA = qw(Exporter);
our %EXPORT_TAGS = ( 'all' => [ qw(
) ] );
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );
our @EXPORT = qw(
avg nsecs nsecs_secs nsecs_nsecs nsecs_usecs print_nsecs
);
our $VERSION = '0.01';
sub avg
{
my ($total, $n) = @_;
return $total / $n;
}
my $NSECS_PER_SEC = 1000000000;
sub nsecs
{
my ($secs, $nsecs) = @_;
return $secs * $NSECS_PER_SEC + $nsecs;
}
sub nsecs_secs {
my ($nsecs) = @_;
return $nsecs / $NSECS_PER_SEC;
}
sub nsecs_nsecs {
my ($nsecs) = @_;
return $nsecs - nsecs_secs($nsecs);
}
sub nsecs_str {
my ($nsecs) = @_;
my $str = sprintf("%5u.%09u", nsecs_secs($nsecs), nsecs_nsecs($nsecs));
return $str;
}
1;
__END__
=head1 NAME
Perf::Trace::Util - Perl extension for perf trace
=head1 SYNOPSIS
use Perf::Trace::Util;
=head1 SEE ALSO
Perf (trace) documentation
=head1 AUTHOR
Tom Zanussi, E<lt>tzanussi@gmail.com<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2009 by Tom Zanussi
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.10.0 or,
at your option, any later version of Perl 5 you may have available.
Alternatively, this software may be distributed under the terms of the
GNU General Public License ("GPL") version 2 as published by the Free
Software Foundation.
=cut
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