From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.17.20]) (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 E224B21F774 for ; Mon, 12 Oct 2015 02:08:16 -0700 (PDT) Received: from u-089-d068.biologie.uni-tuebingen.de ([134.2.89.68]) by mail.gmx.com (mrgmx103) with ESMTPSA (Nemesis) id 0MexlN-1ZwCBL1eeH-00Oa57; Mon, 12 Oct 2015 11:08:06 +0200 Content-Type: text/plain; charset=windows-1252 Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) From: Sebastian Moeller In-Reply-To: Date: Mon, 12 Oct 2015 11:08:08 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <20FAC204-CAA3-4E36-938A-E857EE81C0A3@gmx.de> References: To: dtaht/sch_cake , Kevin Darbyshire-Bryant , =?windows-1252?Q?Dave_T=E4ht?= , loganaden@gmail.com, cake@lists.bufferbloat.net X-Mailer: Apple Mail (2.1878.6) X-Provags-ID: V03:K0:GhIXjfgMelAxKFJr8ePU7WxjCC6aFjLmBWk4iTUhcl3vdUmEjpQ S3fwU7uWyDhPKW3yVPB/fVyrAdeAogzOBF639jLK7RnSho5C689bs+gq2BpJ+QlE152u7oC 1qVSk1FqFUoApIy5W2+DIJw4sOyGjF8H4rK9ZR/WnICWZlBCP+1U4SrMJSJH2NbG/v/5OYG jZnQIGklwM9UFGYvdTnPA== X-UI-Out-Filterresults: notjunk:1;V01:K0:OUxatxTMVqI=:mlDGjvzGycH5Jogf5vvrMP HpdEMEeauUQl/lDVKGz8LvXjY3kncfaUa1Gx1yR8DN9sVH8q7IF4n2uthPBm8o3tOdyoXul6D BInlkaI+l04potM6TcolnemGYsp2DbJutzBz/zNXZvuobOQdcY8OhkHQ4f4furdQE8aGaeOUE M6Gf7AKXSrB9IS9N7nlIBHBUbWS3qo/5pXzvfx7FeueHzCsCfPCkUPEL9YhLBXJc5eVEi755X pQfu8LH9boKy1kECNu6Qt310Kl+conPNci7EVpJdcvyCUMw9gY1TdPLLUeJVjuTpz+g20n1bS zmG5z+bB9LIVd+B5rH4d1ggjc0w9pOQHnOjsI/LUXescULRkaG60MHmgxMJGT9NLjT/LTog29 ewICLxLQJqoBcl3xcZG8ODWpT9zGPMvC5J9Y+NVUzyGP4r3hcGwWd/ZtLStCPCpyKOmVNgV+g 34oY4/VYTQr8Iosne4UIJ3Ecvvgc4kQ4vLUTJai5vlp9L/opliv9hjd2x+s+5xgjZcPz90YzI 2aCYrZ4hm8+TMZVdFqnDi1XBT9SdcKa7Jwk3xr94uK//Rhk5aQIs1N/EHQNR1aoDhwEpece/m fw7uQVidmk97pbklrA5scoxFumidbGgafMBh23NhtmV7zHOBep+BBCcahLN2LX2WX5tjcDojd 9OvdCqabsMYCRTh+3ykPeLB4nsV0cgYEA1iVV5B3DAGRa9GKVh9aDOS9LRW5BNNjfAEoONt+m wRBOi2ZvosxJ3CFwgZktubfiueKA+uAq/XPj1p/Ee7QzUpcgtuNXqfK2wjav513vDKKmi6A6J uZoQZxk Cc: dtaht/sch_cake Subject: Re: [Cake] [sch_cake] Merge branch 'exposeinterval' (5541271) X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Oct 2015 09:08:40 -0000 Hi Kevin, On Oct 12, 2015, at 10:55 , Kevin Darbyshire-Bryant = wrote: > It's worse/better than that - if you look at cake_set_rate it actually = sets the interval to the max of target(5ms) * 8 or the supplied interval = parameter, so actually as it currently stands the lowest you can = ACTUALLY set interval to is 40ms. Good to know, data center people might not appreciate that given = that for fq_codel a target value of 500=B5sec seems to be recommended = (now whether fq_codel/cake really are applicable for data centers is = another question). But since I have no data center available I would not = know how to test this, so others need to chime in. (Note to self, it might make sense to also expose the = target-parameter, potentially not in raw time units, but as a percentage = of interval, as specified in the codel RFC draft section "4.4. The = target Setpoint,=94, see = https://datatracker.ietf.org/doc/draft-ietf-aqm-codel/?include_text=3D1 = ). >=20 > I put those limits in purely as an anti hack/tc stupidity/pointer gone = wild - defensive programming thing. Take 'em out/tweak/whatever. Oh, I am all for sanity and playing it safe, this is why I = wondered whether the actual limits will work for the targeted audience. = It would be sweet if the initial limits of the upstream commit could = survive some time, so sqm-scripts does not need any gymnastics to inform = users about changed behavior (so I am asking for purely selfish reasons) = ;) Loganaden, since you have experience, how long are your RTTs = from Mauritius to France and both US coasts (as a proxy for =93typical=94 = traffic destinations); so we can taylor the limits to allow that. Best Regards Sebastian >=20 > =97 > Reply to this email directly or view it on GitHub. >=20