From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.15.15]) (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 552F921F7E5 for ; Sat, 24 Oct 2015 00:58:56 -0700 (PDT) Received: from hms-beagle.home.lan ([217.237.68.126]) by mail.gmx.com (mrgmx001) with ESMTPSA (Nemesis) id 0MTjqS-1ZyjQi0JKy-00QTRi; Sat, 24 Oct 2015 09:58:52 +0200 Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Content-Type: text/plain; charset=windows-1252 From: Sebastian Moeller X-Priority: 3 In-Reply-To: Date: Sat, 24 Oct 2015 09:59:02 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: References: <562A5BE5.6010101@gmail.com> <12883.1445625688@sandelman.ca> <562A9611.4050403@gmail.com> To: "David P. Reed" X-Mailer: Apple Mail (2.1878.6) X-Provags-ID: V03:K0:EHHG8FfMubAZdOBMsjbm7xuufLHctRiWrQsSltltBO+PAd6C3/A GUIEetBtJosnCjaW6nSASJoeaiZexlo5G2oLQUTODZoknvuMqNwCx+a3oMT+zDLNPLmsef1 wUIUWaEhG4GsbTDMbMO/5kGvWPWLT6c/3qWBYA8kJt1ntSpF5vTyn1WEwJpGVhz47mSIpFl m2fdvjuVvo4ttJLuPGK8Q== X-UI-Out-Filterresults: notjunk:1;V01:K0:FsbQPSc+4xY=:GjvWPuPyujSVzDQXSR9V9A Mr+lfqSuIt4LkdzXK3FlHIRI27MDwJxuynNiAkgpWDSow7YDOsXci4G9j4bpXd6/0Tu2rJZ/p qPTFF5BZKOc9P4tQ1aiGRozLuUn/88DHo1pL1GXGKCfTEGX/98AzBZ27q5PEBqnpMHwv8iBeT gnZTXdd2UR6oXLEhWyamzCbHQefSHYVIsebCMR5EcbX+gCyGeXchRU+thBL5aPcpulspQ3h9Q 6q52fcZOZ82uLqNSn8Rw3IypEbweT3mZH+VFsD2RY+7xbDjgwXjzOaeQevEWP/lpxOFQEkuQt /aZJCuhULUBrPttEQ/FoHgDj9Cs+KjmqrySHvri7OTgGDf5979dTxK4eraQmGGpTMv9FRVYjf kfX/IQJtuJ1ayOK8WMnvXP+ttTNV+uFlS2fpNMXolTcUns5T7ocBbc4vtmF0S9f6X3JLuoY8B e/7cHKgadZy5H2f23P+RLhSaA/B8gVDmjUBM0LBthXokkdJ6ZwNuu7s1vOQ8sIXVImqHPqD4i 3yd/4oShZbRPERSHVkQ8NdpLuu6zMdgXbJ0Gwl+IOXVcIOj06ShPNLOfk9Bd/w1bd3KhJ7dr6 TgQYAErAe6tsi2WNWEMYB5EJhuz3Q1whb203/B+1qOcUIMvboFU5UQ6gwkPu4x5r5dRzFkJax +j4Sp8Gl+ZBdIBWouyTLxyNTxJEHxKoPSr2fJbQHNWgqoOvIn5b5hT025T8Gik9OBVkseGjtg z9LJCmHWoHqA+woTb84LW7TkQRjkK6blaeDcrRUG3Y8G1ItamABjeqLqzUNL6+jWsLr/Ui15z sE2pMIw Cc: cerowrt-devel@lists.bufferbloat.net Subject: Re: [Cerowrt-devel] Problems testing sqm 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: Sat, 24 Oct 2015 07:59:19 -0000 Hi David, On Oct 24, 2015, at 00:48 , David P. Reed wrote: > Sqm is a way to deal with the dsl or cable modem having bufferbloat. = In the configuration described neither end is the problem ... the DUT = itself may have bufferbloat. But our claim is that we =93solved=94 (at least wired) buffer = bloat. And in his case the failure of even our reference platform = wndr3700v2 to keep sane latency under load hints at issues; with a = configuration issue, or some yet un-solved corner issue with our = solution. > That would be terrible. I agree, so let=92s try to figure out what is happening here.. Best Regards Sebastian >=20 > On Oct 23, 2015, Richard Smith wrote: > On 10/23/2015 02:41 PM, Michael Richardson wrote: > Richard Smith wrote: > My test setup: >=20 > Laptop<--1000BaseT-->DUT<--1000baseT-->Server >=20 > So, given that the DUT is the only real constraint in the network, = what > do you expect to see from this setup? >=20 > Given that the probably DUT can't forward at Gb/s, and it certainly = can't > shape anything, it's gonna drop packets, and it's probably gonna drop = them in > Rx, having overrun the Rx-queue (so tail-drop). If there is too much = ram > (bufferbloated), then you'll see different results... >=20 > Setting ingress/egress to 10Mbit/s I expected to see the speed=20 > measurements bounce around those limits with the ping times staying in=20= > the low double digits of ms. What I saw however, was the data rates=20 > going well past 10Mbit limit and pings up to 2000 ms. >=20 > This is what I've seen in prior rrul testing using a the 50/10 cable=20= > link at our office and my 25(ish)/6 link at my apartment and a well=20 > connected server on the net. That however was using QoS and not SQM. >=20 > Its that a reasonable expectation? >=20 > -- Sent with K-@ Mail - the evolution of emailing. = _______________________________________________ > Cerowrt-devel mailing list > Cerowrt-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cerowrt-devel