From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-x22e.google.com (mail-wm0-x22e.google.com [IPv6:2a00:1450:400c:c09::22e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 6D89A3CB52; Tue, 31 Jan 2017 11:58:18 -0500 (EST) Received: by mail-wm0-x22e.google.com with SMTP id r141so87618074wmg.1; Tue, 31 Jan 2017 08:58:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=zHmYlCwIHPmF+xfsHZZuvTsCt3R1khlyk2Pn5gnIYf0=; b=tlGEpcBhvCGEdRXhOoHXw/RK3YNgSkSnd3pnR3ofGy97CSFm1lNmEvfpqesw4rfFs8 +T0DyVI1uR+ZGZN7g7Tlrqk98b0gN9RWFoGTdugjN5WjHpceI27/wS9vCwZ3SB4tp6lp jXv2qAferuAQo01Ca9g1kJbKB79MMqeykoStcagxajQj5KWB1wfxgjX01YH4HFSkh+vs VYlDDBWAOK9tqDXIPUZ7HCXnCN2SzpfdiGMsiBE66A5+tUW/enx6AJ911/tmAcI8Mcno 3v4RczBJNseNUq9PCAP2Q88ne3EIkCq5km/x4EGgD/Sq4vKu2vxAHijoBAyB9fkUDf2P Xv0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=zHmYlCwIHPmF+xfsHZZuvTsCt3R1khlyk2Pn5gnIYf0=; b=OsON5Ql+GV8+z94Le3ZSVGAd5F/OMfZpzjSTO4s1tE2w0aYh0zuJbr0lp9D0JGapCu 0vjMuDFRYyTvVmwuRllb/Th4R5uy6BrBYXZcWlV6CSxqOlzvpzi3NMK2PbZhaiwMFB/x 5S9H4Cp53A9iNW0HQ3gemelXqFxu5wUkkq4BA/9BzFxmq/+MPFgQVo9ac2PUYqOyxOJ3 IhLYMR0zyORDUc63nFOLUug6Ab8Hk6mibcmXyyM8mnvH+AtHs72jmrpEdLVp/8myo+9q acENfXRr2F3Sb/gZrQ4QFdAdFBzZs63ZNo2B0MzwGU78PO+sfZuhqYfuqJbYwzE80PQ+ 5t2Q== X-Gm-Message-State: AIkVDXK1GGWJa32pFf9nrlRLLKjAcf4a/P1qxNS5EFF1OL8R17zj8F/VJkyUZXLVipiE1g== X-Received: by 10.223.132.166 with SMTP id 35mr24203887wrg.122.1485881897377; Tue, 31 Jan 2017 08:58:17 -0800 (PST) Received: from [10.72.0.34] (h-1169.lbcfree.net. [185.99.119.68]) by smtp.gmail.com with ESMTPSA id c9sm24879291wmi.16.2017.01.31.08.58.16 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 31 Jan 2017 08:58:16 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Pete Heist In-Reply-To: Date: Tue, 31 Jan 2017 17:58:18 +0100 Cc: make-wifi-fast@lists.bufferbloat.net, cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: <96F9B322-5013-40FC-9199-3586231A164C@gmail.com> References: <32C42951-373F-4D90-8936-AA07039E5D73@gmail.com> To: Dave Taht X-Mailer: Apple Mail (2.3124) Subject: Re: [Make-wifi-fast] Flent results for point-to-point Wi-Fi on LEDE/OM2P-HS available X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 31 Jan 2017 16:58:18 -0000 > On Jan 31, 2017, at 12:55 AM, Dave Taht wrote: >=20 > * Question #16: Is there any other testing anyone would like to see > while I have this rig up? >=20 > 1) ECN on on both sides. > 2) A voip test > 3) P2MP (3 or more stations, rtt_fair_var* tests) > 4) Lowered MCS rates or distance or rain Ok, I=E2=80=99ll see what I can do on 1, 2 and 4. #3 might be for another day, another site (Open Mesh at an outdoor camp, = another story), but I=E2=80=99d like to get to it. > * Question #15: FreeNet's link to the Internet is 1 Gbps, and AFAIK > does not experience saturation. The e1000 ethernet driver that the > Internet router uses supports BQL. Is there any sense in running > fq_codel or similar on the router, if it does not become saturated? >=20 > You don't need queue management until you need queue management. A > basic flaw of mrtg's design in your graph here is that it takes > samples in 5 minute windows. If you are totally nuking your link for 1 > sec out of 5 and the rest nearly idle, you won't see it. A flent test > in their offices to somewhere nearby over that link will be revealing. >=20 > In general, applying fq_codel on a BQL enabled system is always a > goodness, it costs next to nothing in CPU to do it that way. > (outbound). Depending on your measurement of what happens on inbound, > you might want to do inbound rate shaping=E2=80=A6. Ok, I=E2=80=99ll see if they=E2=80=99re game to try that. That would be = great if it helped. > The gains are relative to the bandwidth and the amount of fixed > buffering in the radio. For example, I can get 320Mbits/sec out of the > archer c7v2's ath10k, with 10ms latency, at 8 feet. 20 feet, and > through a wall, it's 200Mbit/100ms latency. I don't like the initial > shape of that curve! (what I typically see happen on 802.11ac is it > hitting a wall and not working at all) My testing was actually through one wall also (drywall). I didn=E2=80=99t = have the radios right next to one another. But I=E2=80=99m at 2.4 Ghz = and I think you=E2=80=99re at 5 GHz, so walls are going to affect that = setup more, of course. I=E2=80=99m surprised how much of a latency hit = you see through one wall. > I happen to like ubnt's gear, although their default firmware only > lasts 5 minutes for me these days. They have very good throughput and > latency characteristics with decent signal strength. I look forward to > a benchmark of what you can get from them. (I am still looking for a > good upgrade from the nanostation M5s) My PowerBeam M5-400 has been very stable. I think I=E2=80=99ve only = rebooted it for config changes or on general principle. > Question #12: What's the reason for Cake's occasional sudden > throughput shifts, and why do its latencies tend to be higher than > fq_codel? >=20 > We are still debugging cake. Recently the API got a bit wacked. The > AQM is tuned for DSL speeds. More data is needed. Ok, there=E2=80=99s plenty of Cake data in my results to mine, or if = Jonathan asks I=E2=80=99ll try something else. > * On the pfifo analysis - I really enjoyed the rush song and it was > very appropriate for how pfifo misbehaves! >=20 > * Question #9: Does my assertion make sense, that it's "better" to do > half-duplex queueing on only one end of the link? The side towards the > Internet? >=20 > Usually the stuff coming from the internet dominates the traffic by a > 8-20 figure, so coming from might be a worthwhile place to shape. >=20 > I ran out of time before tackling 8-1.... Thanks for all the help. After I test more from your suggestions, I=E2=80=99= ll re-post with results and any remaining questions, but a lot of it=E2=80= =99s clearing up for me!