From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) (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 8566821F390; Thu, 30 Jul 2015 20:27:03 -0700 (PDT) Received: from [10.17.153.74] ([80.187.102.40]) by mail.gmx.com (mrgmx102) with ESMTPSA (Nemesis) id 0Lpgew-1Yhqjq0BQU-00fTrg; Fri, 31 Jul 2015 05:27:00 +0200 User-Agent: K-9 Mail for Android In-Reply-To: References: <356F5FEE-9FBD-4FF9-AC17-86A642D918A4@gmail.com> <5CC1DC90-DFAF-4A4D-8204-16CD4E20D6E3@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable From: Sebastian Moeller Date: Fri, 31 Jul 2015 05:27:02 +0200 To: Jonathan Morton Message-ID: <4D24A497-5784-493D-B409-F704804326A7@gmx.de> X-Provags-ID: V03:K0:L4hd6byzvz9an0t/nOTvLbGYyI4IVm3h5xAS/JWx22KCHMcve/P 0PRwqvNYTzy9sPm/Nc2AWD/SfHRAyLlIAOh5kYHFT8cWFDAQeVKEMUkxBs9jKjnkFvkhON6 50zCMNqfWz1Hn4b3ynxvRB23mG6maZceTVMc8WTdYt36enXwJ9bZWaSrGV/paVt41uVgQO9 kWqa+zqzfi/m4W1qkcgwQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:/fb826mzwoY=:iKULUSBSoRyUVKtKrFPMHQ Qd18yxqMy3w49Ss8dPHNC47g36qT5oZ2mgeEViC8sEIHDsdcfXQHIJ2lDlPjy7/KJ5D7KVKVJ 4HUpiu4dD7NNKYzDlzqrlXdP6m6KFFkkHXa0WonzOiV10x/OEG/BOM01gwhCGKbn0O/pshLw/ PR5Pc3K5vXhcx1x7D5gILjOJ/TzqKmunrWmEyjvhYdlChBLrzMRnzrEWz7GE45JbzZB5KDHdV ieA/bdTnEqB4XcWYF3YVRKsX2jEMr2pu0zTGGcfc8UGWTYHmdKCL+Ib5Hv0RS7dz8Zk9rOv0D zSOvxbYbSRIFQPDSEoaqlcfOlhR/HsjN3sYsSlcSszyVz2gz9yaVJT/fPxdGtz0lyGzHIvb+t H26qkyvqCOVoT/aMe4RgbZoS5FBXL0DqMrV2SPIUjUH7nBL5kkBS9c3K2Xp10gCG225ACmsxl 6z2qW9JMfaxKyjaB5cEMCWPuTVjftorV+rVIsDxIhMUdSCs4pJfujqbsGkyAQFMzbdlO7V2zg lwVxjJ8dBb77c6UgturfvfBbAN5cEVvG8SbyvcRlNIsm+rrBRf01S8r6n1rotQP0Z/r7YqJJV np+kHLHC7fqJmYhpat3WcDROxUKO3EZNV8E1M30MpfBwVEJO1J4idVMHift8CEkXcvxgsnsFv rNF1xe/hxx4ut7Zgx/oIBxRoboVXW0r92b56y3BGJLiyHwRo1halhJn7SRXKjt+As8K5VyuiT KBS/xVIguCDQu3lO Cc: make-wifi-fast@lists.bufferbloat.net, cerowrt-devel@lists.bufferbloat.net Subject: Re: [Cerowrt-devel] [Make-wifi-fast] [tsvwg] Comments on draft-szigeti-tsvwg-ieee-802-11e 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, 31 Jul 2015 03:27:33 -0000 Hi Jonathan,=20 On July 30, 2015 11:56:23 PM GMT+02:00, Jonathan Morton wrote: >Hardware people tend to think in terms of simple priority queues, much >like >old fashioned military communications (see the original IP precedence >spec)=2E Higher priority thus gets higher throughput as well as lower >latency=2E > >I note also that in 802=2E11e, leftover space in a TXOP can't be (or at >least >generally isn't) used opportunistically for traffic from another class, >because the four queues are so rigidly separated=2E > >I think the hardware people are shortsighted in this respect=2E It's so >easy >to game simple priority queues when there's no filter on the field >controlling it=2E That's why cake's Diffserv layer works the way it does= =2E >And >if I ever get the chance to do a Wi-Fi specific version, I'll avoid >both of >the above problems=2E > >- Jonathan Morton Thanks for the insight=2E Now I Start to realize why my jome network behav= es AS it does=2E When I run RRUL locally from my macbook over WiFi with cer= owrt as AP (which if I recall correctly only uses AC_BE) the macbook's send= starves the AP and hence the macbook's receive tanks=2E Since macos seems = to exercise the AC_v[I|o] queues, it hogs airtime and and all systems using= lower AC classes see less airtime, less bandwidth and higher latency=2E I = guess my gut feeling would be to run the AP always at AC_VO so it does not = get starved=2E But really calling such a system where any station can infli= ct that much pain/badness on others 'quality of service' makes me wonder=2E= Then again it certainly affects quality of service just not deterministic = or overall positive ;) Best Regards Sebastian --=20 Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E