i think windows uses tcp compund (that we have not investigated...)<div><br></div><div>-sm<br><div class="gmail_quote">On Wed, Nov 30, 2011 at 1:23 PM, Barry Constantine <span dir="ltr"><<a href="mailto:Barry.Constantine@jdsu.com">Barry.Constantine@jdsu.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi Saverio,<br>
<br>
Does Windows 7 use this TCP implementation as well?<br>
<br>
Thank you,<br>
<font color="#888888">Barry Constantine<br>
</font><div><div></div><div class="h5"><br>
-----Original Message-----<br>
From: <a href="mailto:end2end-interest-bounces@postel.org">end2end-interest-bounces@postel.org</a> [mailto:<a href="mailto:end2end-interest-bounces@postel.org">end2end-interest-bounces@postel.org</a>] On Behalf Of <a href="mailto:mascolo@poliba.it">mascolo@poliba.it</a><br>
Sent: Wednesday, November 30, 2011 6:11 AM<br>
To: <a href="mailto:end2end-interest@postel.org">end2end-interest@postel.org</a><br>
Subject: [e2e] Reasons not to deply TCP BIC/Cubic<br>
<br>
Dear all,<br>
<br>
we know that TCP BIC/Cubic is default in Linux and as a consequence<br>
50% of servers employs TCP BIC/Cubic.<br>
<br>
Our measurements say that there could be reasons not to deploy TCP<br>
BIC/Cubic. These reasons are in our opinion rooted in its more<br>
aggressive probing phase. In particular, in common network conditions,<br>
TCP BIC/CUBIC exhibits: 1. a larger RTT average wrt to TCP NewReno or<br>
TCP Westwood+; 2. a larger number of retransmission wrt to TCP NewReno<br>
or TCP Westwood+; 3 larger throughput but same goodput wrt to TCP<br>
NewReno or Westwood+.<br>
<br>
In other terms, it seems that its more aggressive probing increases<br>
both throughput and retransmissions but leaving unchanged the goodput.<br>
This is neutral for the users but negative for the network.<br>
<br>
I appreciate your views.<br>
<br>
Thanks for the attention and best regards,<br>
<br>
Saverio Mascolo<br>
<br>
----------------------------------------------------------------<br>
This message was sent using IMP, the Internet Messaging Program.<br>
<br>
</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br>Prof. Saverio Mascolo<br>Dipartimento di Elettrotecnica ed Elettronica<br>Politecnico di Bari<br>Via Orabona 4, 70125 Bari Italy<br>Tel. +39 080 5963621<br>
Fax. +39 080 5963410<br><a href="mailto:email%3Amascolo@poliba.it">email:mascolo@poliba.it</a><br> <br><a href="http://c3lab.poliba.it">http://c3lab.poliba.it</a><br><br><br>=================================<br> This message may contain confidential and/or legally privileged information.<br>
If you are not the intended recipient of the message, please destroy it.<br> Any unauthorized dissemination, distribution, or copying of the material in<br> this message, and any attachments to the message, is strictly forbidden.<br>
</div>