BW.in.pl
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上传日期:2015-12-11
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- #!/usr/bin/perl -w
- #
- # Copyright (C) 2001 by USC/ISI
- # All rights reserved.
- #
- # Redistribution and use in source and binary forms are permitted
- # provided that the above copyright notice and this paragraph are
- # duplicated in all such forms and that any documentation, advertising
- # materials, and other materials related to such distribution and use
- # acknowledge that the software was developed by the University of
- # Southern California, Information Sciences Institute. The name of the
- # University may not be used to endorse or promote products derived from
- # this software without specific prior written permission.
- #
- # THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
- # WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- #
- # This work is supported by DARPA through SAMAN Project
- # (http://www.isi.edu/saman/), administered by the Space and Naval
- # Warfare System Center San Diego under Contract No. N66001-00-C-8066
- #
- sub usage {
- print STDERR <<END;
- usage: $0 [-w FilenameExtention]
- Options:
- -w string specify the filename extention
- END
- exit 1;
- }
- BEGIN {
- $dblibdir = "./";
- push(@INC, $dblibdir);
- }
- use DbGetopt;
- require "dblib.pl";
- my(@orig_argv) = @ARGV;
- &usage if ($#ARGV < 0);
- my($prog) = &progname;
- my($dbopts) = new DbGetopt("w:?", @ARGV);
- my($ch);
- while ($dbopts->getopt) {
- $ch = $dbopts->opt;
- if ($ch eq 'w') {
- $fext = $dbopts->optarg;
- } else {
- &usage;
- };
- };
- $finbw=join(".",$fext,"inbound.BW");
- $c1="";
- $s1="";
- $j=0;
- local(@datan);
- local(@n);
- #estimate delay and bottleneck bandwidth for inbound traffic
- open(INBW,"> $finbw") || die("cannot open $finbwn");
- while (<>) {
- ($client,$server,$time,$seq) = split(' ',$_);
- #estimate bottleneck bandwidth between remove servers and ISI clients
- if (($c1 ne $client ) || ($s1 ne $server)) {
- #take at least 3 samples for estimation
- if ( $j gt 3 ) {
- @datan = sort numerically @n;
- $m=int($j/2);
- # print INBW "$c1 $s1 $datan[$m]n";
- print INBW "$datan[$m]n";
- # print INBW "$datan[0]n";
- }
- $#n=0;
- $j=0;
- } else {
- $len = $seq - $q;
- $interval = ($time - $t) * 1000000;
- $bw=0;
- if (($interval gt 0) && ($len gt 0)) {
- $bw = $len / $interval;
- }
- if ($bw gt 0) {
- $n[$j]=$bw;
- $j=$j + 1;
- }
- }
- $c1=$client;
- $s1=$server;
- $t=$time;
- $q=$seq;
- }
- if ( $j gt 3 ) {
- @datan = sort numerically @n;
- $m=int($j/2);
- print INBW "$datan[$m]n";
- }
- close(INBW);
- sub numerically { $a <=> $b; }