From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-x231.google.com (mail-ob0-x231.google.com [IPv6:2607:f8b0:4003:c01::231]) (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 6FBE421F1BE for ; Thu, 23 Apr 2015 10:03:07 -0700 (PDT) Received: by obcux3 with SMTP id ux3so18443899obc.2 for ; Thu, 23 Apr 2015 10:03:07 -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=PnLroBe2lKuz4mt+Erp9Mo/Igod+8qnBgufNG/p4sSE=; b=tvgoGOH0F+mgfWbEjmkVNyGzgraGoitAMpaAXdKaJjttJfpTMxWp8sA3BC1tCaGxnP QjN7jAyfAzihBGJmyEWd7bXQidr0URw+C/GjKr4HnyBSJpJgEfcdMHgkTgNt5hrguW0Z qQQho1bLt6F+AaR2ESq0sizunyt+QTeSTwJX1ZxD0qnjAuoYIUECcPLQRdSvMWHLafJi rTjcFZPdpvc6X5ZNSuOk46JKyyJxgBYsohrBfV5sNV/aFN01VCq6hf5UsOyj5tyENIYf KMDt5z2P/Qz3zJ5sixVNKYaffHbBD3sNf+/OnBjauWM3hmwpGHaNrw0Ji8zoRG8lpQkC DmsA== MIME-Version: 1.0 X-Received: by 10.182.255.171 with SMTP id ar11mr3413926obd.29.1429808586970; Thu, 23 Apr 2015 10:03:06 -0700 (PDT) Received: by 10.202.71.139 with HTTP; Thu, 23 Apr 2015 10:03:06 -0700 (PDT) In-Reply-To: References: <87wq18jmak.fsf@toke.dk> <87oamkjfhf.fsf@toke.dk> <87k2x8jcnw.fsf@toke.dk> Date: Thu, 23 Apr 2015 10:03:06 -0700 Message-ID: From: Dave Taht To: Mikael Abrahamsson Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: bloat Subject: Re: [Bloat] DSLReports Speed Test has latency measurement built-in 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: Thu, 23 Apr 2015 17:03:36 -0000 justin: thx for nuking the log scale. that makes the bloat much more visible here (typical cablemodem) http://www.dslreports.com/speedtest/322800 I am puzzled as to my post fq_codel result here at T+40 and will have to repeat... http://www.dslreports.com/speedtest/322992 On Sun, Apr 19, 2015 at 12:22 PM, Dave Taht wrote: > So my "acid test", taken on a linux box over ethernet, through a > cerowrt box with sqm-scripts turned off. This is my gf's comcast > "blast" service, which is rated for 55mbits down and 5.5mbits up. The > new speedtest does indeed show results that have the typical bloat > (nearly a second) a cable modem has when tested solely for up and > down, separately. > > http://www.dslreports.com/speedtest/322800 > > A) I definitely am not particularly huge on defaulting to a log scale > for this graph. Or rather, I would be huge on the graph defaulting to > a linear scale AND huge when you get numbers as bad as this. :) > > B) is there a way to specify ipv6? > > 2) So I did a follow on speedtest with fq_codel enabled to shape with > sqm. it may be that my upload shaper is a bit over what is desirable > for this link, and I need to repeat. > > http://www.dslreports.com/speedtest/322992 > > 3) For giggles, this one is with ecn enabled both on the shaper and on > the tcp I am using, showing that this speedtest site will use ecn when > enabled: > > http://www.dslreports.com/speedtest/323101 > > Some ecn mark results on the shaper for that: > > http://pastebin.com/sniePC1M > > Both these tests are showing some latency spikes so it does look like > I should tune down the shaper a bit. > > 3) The rrul, rrul_be, tcp_upload, and tcp_download test data from > netperf-wrapper under both these circumstances (no ecn) is up at: > > http://snapon.lab.bufferbloat.net/~d/lorna-ethernet.tgz > > Feel free to create graphs and comparisons to suit selves. > > A few graphs: > cdf plot of latency (have to use a log scale!!) compared between the > shaped and unshaped alternatives... > > http://snapon.lab.bufferbloat.net/~d/lorna-ethernet/comcast_55_speedtest_= comparison.png > > what the overbuffered download looks like: > > http://snapon.lab.bufferbloat.net/~d/lorna-ethernet/comcast_55_speedtest_= comparison_download_bloated.png > > The shaped fq_codeled equivalent: > http://snapon.lab.bufferbloat.net/~d/lorna-ethernet/comcast_55_speedtest_= comparison_download_fq_codeled.png > > (log scale comparison again - 10ms of induced latency vs 400+! Aggh) > > And a graph of probably minimal usefulness comparing the behavior of > the shaped vs unshaped download flow configurations, for both ipv4 and > ipv6. > > http://snapon.lab.bufferbloat.net/~d/lorna-ethernet/comcast_55_speedtest_= comparison_download_compared.png > > On Sun, Apr 19, 2015 at 10:43 AM, Dave Taht wrote: >> I am going to do an acid test today. The line I tested last night is a >> comcast cable line (with htb+fq_codel on the link). So I plan to plug >> in the ethernet on both my mac and linux laptops and repeat the >> comparison with the shaper on and off, with both linux and osx. >> >> the *really funny* part of this is that I do not have a single extra >> ethernet cable in my gf's SF apartment, and the less funny part of >> this is the nearest radio shack is now closed.... > > > > -- > Dave T=C3=A4ht > Open Networking needs **Open Source Hardware** > > https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67 --=20 Dave T=C3=A4ht Open Networking needs **Open Source Hardware** https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67