From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: tcp wifi upload performance and lots of ACKs Date: Thu, 07 Jun 2012 11:10:13 -0700 (PDT) Message-ID: <20120607.111013.2155552765767462604.davem@davemloft.net> References: <4FD0EA18.3090606@hp.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: David.Laight@ACULAB.COM, greearb@candelatech.com, dbaluta@ixiacom.com, netdev@vger.kernel.org To: rick.jones2@hp.com Return-path: Received: from shards.monkeyblade.net ([149.20.54.216]:44779 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760930Ab2FGSKO (ORCPT ); Thu, 7 Jun 2012 14:10:14 -0400 In-Reply-To: <4FD0EA18.3090606@hp.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Rick Jones Date: Thu, 07 Jun 2012 10:51:20 -0700 > This may not work well when the sender has a congestion window growth > heuristic different from what the ACK avoidance heuristic assumes. If > I recall correctly, the heuristic in HP-UX assumes the sender grows > cwnd by the number of bytes/segments ACKnowledged. Linux violates this assumption.