From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: Piggyback the final ACK of the three way TCP connection establishment with the data Date: Thu, 22 Mar 2012 16:44:31 -0700 Message-ID: <4F6BB95F.3030200@hp.com> References: <1332374452.9433.15.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Eric Dumazet , netdev@vger.kernel.org To: Vincent Li Return-path: Received: from g4t0017.houston.hp.com ([15.201.24.20]:18762 "EHLO g4t0017.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755001Ab2CVXod (ORCPT ); Thu, 22 Mar 2012 19:44:33 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: I like piggybacking as much as the next guy, and pushed for a bunch of it in the past, but are the files being transferred really that small relative to the RTT that the savings of the standalone ACK of the SYN|ACK really buys that much? I'm sure it does nice things for a default netperf TCP_CRR test, shaving one segment out of 8 or so, and maybe even more on a TCP_CC test, but how many sub-MSS files are transferred these days? rick jones