From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Injong Rhee" Subject: Re: TCP congestion graphs Date: Wed, 25 Oct 2006 18:34:17 -0400 Message-ID: <000701c6f885$b57aa390$4a580e98@ncsu2cc0c3fa00> References: <20061025110207.78d38779@freekitty> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="ISO-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit Cc: Return-path: Received: from uni07mr.unity.ncsu.edu ([152.1.224.166]:30868 "EHLO uni07mr.unity.ncsu.edu") by vger.kernel.org with ESMTP id S965241AbWJYWep (ORCPT ); Wed, 25 Oct 2006 18:34:45 -0400 To: "Stephen Hemminger" , "Sangtae Ha" Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Not sure why the slow start for cubic is slower than the others. We will check on this. ----- Original Message ----- From: "Stephen Hemminger" To: "Douglas Leith" ; "Sangtae Ha" Cc: Sent: Wednesday, October 25, 2006 2:02 PM Subject: TCP congestion graphs >I ran some congestion window tests against 2.6.19-rc3. > For congestion window graphs see: > http://developer.osdl.org/shemminger/tcp/2.6.19-rc3/ > > The connection was a single flow with a 500ms RTT and a > 100Mbit slowest link speed. > > BIC OK > CUBIC OK (after patch) > HIGHSPEED BROKEN? > HTCP OK > RENO OK (massive overshoot) > SCALEABLE OK > VEGAS OK (no better than Reno) > VENO Same as Reno? > WESTWOOD Overshoot then low window > > Highspeed has something wrong (test glitch?) > Westwood behaves poorly > Veno seems no better than either Reno or Vegas in this > case. > > The end systems were from latest git. The netem bridge is using > 2.6.18-rt with a patch to netem to use hrtimers. iperf was modified > to allow easy selection of congestion control. > > -- > Stephen Hemminger > - > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >