From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-x22b.google.com (mail-ob0-x22b.google.com [IPv6:2607:f8b0:4003:c01::22b]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 550DC21F159 for ; Thu, 23 Apr 2015 21:37:47 -0700 (PDT) Received: by obfe9 with SMTP id e9so29581279obf.1 for ; Thu, 23 Apr 2015 21:37:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=W3KcChk33JKfsZIyqOKh6UgNxwQ7jxeqcerFYPoEQ9s=; b=fpU+7kkgGU1dmt1vWtwcMTO7vvgz4az0BBR4Hw5WHKDiwjMF1AAdhaqK8L7m4zzzlr B+cmwB3yFqHHFv8OvFixeCXsuivodCHGcgWyLzAIpeTx5STB99n98DfcCpP/T/YfF7WA YX82Fdxf61hVfwynQCw7mDDVU1PTT7/QxGQj41JllHIkoUU1+xoE3jbrql0A97BvIP8H xEfiv+AP/7LzMjLVwl3/DLBP+xAo6Xqu6YdbBKX6FQesmKb/jtV8zGBOYfbbQLSwrtx7 2Kn8kuub4ocegxOpPCIC20s6UrfIG3kcfUDbHXizQJjBwvVmqcC6gwsdsibcveOYUzVl HYWA== MIME-Version: 1.0 X-Received: by 10.60.178.33 with SMTP id cv1mr231098oec.11.1429850267078; Thu, 23 Apr 2015 21:37:47 -0700 (PDT) Received: by 10.202.71.139 with HTTP; Thu, 23 Apr 2015 21:37:47 -0700 (PDT) In-Reply-To: <55380D28.5080100@hp.com> References: <20150422191056.9C7AC406057@ip-64-139-1-69.sjc.megapath.net> <1429736552.18561.144.camel@edumazet-glaptop2.roam.corp.google.com> <55380D28.5080100@hp.com> Date: Thu, 23 Apr 2015 21:37:47 -0700 Message-ID: From: Dave Taht To: Rick Jones Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: Hal Murray , bloat Subject: Re: [Bloat] SO_SNDBUF and SO_RCVBUF X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 24 Apr 2015 04:38:16 -0000 On Wed, Apr 22, 2015 at 2:05 PM, Rick Jones wrote: > On 04/22/2015 02:02 PM, Eric Dumazet wrote: >> >> Yeah, the real nice thing is TCP_NOTSENT_LOWAT added in linux-3.12 I will argue that that would give a much better estimate as to how much data was really outstanding on the wire. > > Don't go telling Dave about that, he wants me to put too much into netper= f > as it is!-) Please release 2.7 soonest so we can get it into openwrt chaos calmer. Then we can discuss new features, like the UDPLITE stuff and this. :) That said, I would like try a comparison test against rrul results taken with and without the tcp_notsent_lowat option in netperf when I get back from vacation next week. My guess is that it won't affect the stats we get currently much (might hurt as netperf will run more often), but MIGHT reduce the tail burst problem we see fairly often at the conclusion of the test > > rick > --=20 Dave T=C3=A4ht Open Networking needs **Open Source Hardware** https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67