From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qa0-x22c.google.com (mail-qa0-x22c.google.com [IPv6:2607:f8b0:400d:c00::22c]) (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 1DD6721F1C1 for ; Mon, 24 Feb 2014 06:36:45 -0800 (PST) Received: by mail-qa0-f44.google.com with SMTP id w5so6298438qac.3 for ; Mon, 24 Feb 2014 06:36:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:content-transfer-encoding:subject:message-id:date :to:mime-version; bh=CnVrKlitNctCm45G7KdLSHzmlTkdlEGkkxqL6R/vgIA=; b=tFe0MvSrZRhRJO3KuRCJ6PJsSTTnCLqMtMT7QUTeP3QbNaL16U+UCEUpvJRMlTPs0v UQaslCqBG2SEDNLW6XVsCF3nJAh2AO0RQI/Tu9Ne8Dll7YJU/RWCDrXH0DyU/XuULeOm K9IskjeQSGpdrV3wXgRN9Up98N/nd4/U95SsWdi/7Jv3KRkx3w6jIG2McQaK7Dv/vTZy 9ChGgZDNaygP5liIo18iv/4BezgulPLLRnb2tvcC9BEUx6jrL3SWxFSSFKypwjfMz1Pk Dz6ZaQH2oo/YcQm1tUYy/YCpDLm9WL4EMLdM3QgQ9F9L1AXqdmiYv9FStWlQxSw6S072 Ed1A== X-Received: by 10.140.90.80 with SMTP id w74mr29292774qgd.96.1393252602176; Mon, 24 Feb 2014 06:36:42 -0800 (PST) Received: from richs-mbp-3513.home.lan (pool-72-73-76-141.ptldme.east.myfairpoint.net. [72.73.76.141]) by mx.google.com with ESMTPSA id q10sm50045533qaj.13.2014.02.24.06.36.41 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 24 Feb 2014 06:36:41 -0800 (PST) From: Rich Brown Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Message-Id: <4E5BC321-2054-4364-BECC-DF34E0D20380@gmail.com> Date: Mon, 24 Feb 2014 09:36:41 -0500 To: cerowrt-devel Mime-Version: 1.0 (Mac OS X Mail 7.1 \(1827\)) X-Mailer: Apple Mail (2.1827) Subject: [Cerowrt-devel] Equivocal results with using 3.10.28-14 X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 24 Feb 2014 14:36:45 -0000 CeroWrt 3.10.28-14 is doing a good job of keeping latency low. But... it = has two other effects: - I don't get the full "7 mbps down, 768 kbps up" as touted by my DSL = provider (Fairpoint). In fact, CeroWrt struggles to get above 6.0/0.6 = mbps. - When I adjust the SQM parameters to get close to those numbers, I get = increasing levels of packet loss (5-8%) during a concurrent ping test. So my question to the group is whether this behavior makes sense: that = we can have low latency while losing ~10% of the link capacity, or that = getting close to the link capacity should induce large packet loss... Experimental setup: I'm using a Comtrend 583-U DSL modem, that has a sync rate of 7616 kbps = down, 864 kbps up. Theoretically, I should be able to tell SQM to use = numbers a bit lower than those values, with an ATM plus header overhead = with default settings.=20 I have posted the results of my netperf-wrapper trials at = http://richb-hanover.com - There are a number of RRUL charts, taken with = different link rates configured, and with different link layers. I welcome people's thoughts for other tests/adjustments/etc. Rich Brown Hanover, NH USA PS I did try the 3.10.28-16, but ran into troubles with wifi and = ethernet connectivity. I must have screwed up my local configuration - I = was doing it quickly - so I rolled back to 3.10.28.14.=