From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.15.19]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mout.gmx.net", Issuer "TeleSec ServerPass DE-1" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 79F3021F5C0 for ; Fri, 26 Jun 2015 09:27:31 -0700 (PDT) Received: from hms-beagle-7.am28.uni-tuebingen.de ([134.2.92.93]) by mail.gmx.com (mrgmx002) with ESMTPSA (Nemesis) id 0LynHb-1Z3JPq12vf-016BSw; Fri, 26 Jun 2015 18:27:29 +0200 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) From: Sebastian Moeller In-Reply-To: Date: Fri, 26 Jun 2015 18:27:31 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <50067716-7437-40C5-BF97-8AF7668F5967@gmx.de> References: <26463A88-821B-44B7-A728-64BCB0B7C7BB@gmx.de> <55847E32.9000405@gmail.com> <5584823E.4040207@gmail.com> <0129B5FB-9D1B-45FF-84CA-492A6A0B638B@gmx.de> <43D5C3CE-F1F4-4BA5-AEB9-55348661C7BA@gmx.de> To: Mikael Abrahamsson X-Mailer: Apple Mail (2.1878.6) X-Provags-ID: V03:K0:zqDJNNmr3Hsu8VYuX3dcwzTnSqIFXjPXDgM8u+hEJxNIHHKtbBC BdHCxACoYCf3hLt/jFOsPNsEsCU4sKyJQPO7YAa9X2Khj0QyCbLPMf4BHBv0pa5NC0JTuM/ LYW71Yi9Kf/TN919CiK7tQPT9VC7gSkcqqgA3tk/V8LPA+QWp88jSeK5H7PFN8ORO7ao4Y1 5eosxVRyeNcluOMVcFfyA== X-UI-Out-Filterresults: notjunk:1;V01:K0:45n+yoIHCUU=:FPvNY8XQX+fKx9HFsXqWuw vyz7hn3wBxTT/RnVNywlYDl8nCtmYnr/lCpbzrtYR1XRYoK6CO9qFXNSHJx8xo5k4zv3h3zTU LjyBqrloi/TGUgZxd3+jXABQ0tG3e25or9nqSGOUDdsfRk97L2KZ/AQw2RvUi6TemSVIBqg3B kOQDNe9zv30qQ7irBdOYEyln2lSvUR7GFMj9h1hwcgaWN+MJCNvt5WAL4r2ElBWbpn1hL0TsL HVPEnaGeJaOakvkYvQbSH/ufO0E1fa6yWkVAJ3S1ngPDnDV8/D32al1N1mOJESJz/QIa+lBxZ BiOnhp2b6ER6/nViclD+4Cwvmw/xlVIzUZH2SbcjRXlz0Bzx4JEamieI5ANcGNw6sBD7Hd4CY duuqj+hhVxV3nTabqlT2TWOohaQT/BLz6L642F3F9GPqTSKxoSAmU5QoTNnmNOlZ7NsaL3DKL Im8d6Nx8LT6yBvJDJgt4iQC9KZdl81WKgdX5u4K9ZhDzXj75IeLkQIeOyR0KAPrrPCfETRyKs T0U9KPdTsP+gVllRJxemT4h1Nu1+dr/MFz9x091a8E0u6zqty0e4B2FfHgeAn8HoE3Xmvo1g8 7yuV5wleKnNxLLviwpQ1RToCvYBHUuJLWMoOSNvLRRXQDDvgusrfS6ThZy6weKNdR1uq7UmlQ Dgt61SSbg5u/mAMQlAOvdwIZEyawOlWD04EQ1rZtWpfNqljzdN+Wk3Wka6bFSW7p9flk= Cc: cerowrt-devel Subject: Re: [Cerowrt-devel] performance numbers from WRT1200AC (Re: Latest build test - new sqm-scripts seem to work; "cake overhead 40" didn't) 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: Fri, 26 Jun 2015 16:28:01 -0000 HI Mikael, On Jun 26, 2015, at 16:49 , Mikael Abrahamsson wrote: > On Fri, 26 Jun 2015, Mikael Abrahamsson wrote: >=20 >> Btw, I tried WNDR3800 setting it to 100/100 SQM. It seems to max out = around 25-30k PPS, but the difference is that when the CPU is full, it = seems to delay/ECN-mark packets because there are no packets lost. When = the WRT1200AC runs out of CPU it starts dropping packets. I always have = 0 packets lost with the WNDR3800 when doing iperf3 testing. I found this = difference interesting, wonder where in the forwarding path the = WRT1200AC loses packets? >=20 > I checked again, and my WDR4900 with same setup doesn't lose packets = either. Even at 99% sirq, no packets are lost. Tangent: What is the shaper rate the wdr4900 can push with = sqm-scripts? (Before your 1200ac results the ppc-soc in the wdr4900 = looked like the finest little router platform in the last years, too bad = it was ignored by the mass market...) >=20 > WRT1200AC starts to lose packets at 500 megabit/s SQM around MSS 300 = and lower. If I turn off gso, tso and gro, I have to go to MSS 600 and = above to avoid packet loss. So the offloads buy roughly a doubling of the achievable packet = rate, not bad, but as your results show also knot essential. Best Regards Sebastian >=20 > Does flent check for packet loss at all? Perhaps it's something to = look into, because with ECN we really don't want to see any packets lost = and this might be good to include test results for. >=20 > --=20 > Mikael Abrahamsson email: swmike@swm.pp.se