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([2001:470:6aac:1:1863:a450:60bb:225e]) by smtp.gmail.com with ESMTPSA id e127sm20089936pfc.185.2017.12.03.07.26.10 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 03 Dec 2017 07:26:11 -0800 (PST) To: bloat@lists.bufferbloat.net References: <7B92DF4D-B6B5-4A64-9E10-119DCA2D4A6F@ifi.uio.no> <1512037480.19682.10.camel@gmail.com> <6b494910-1373-afb0-5b93-99b725391fb3@gmail.com> <87wp2638yo.fsf@toke.dk> <87tvxa36sn.fsf@toke.dk> <87po7ygxai.fsf@nemesis.taht.net> <87shcui3ni.wl-jch@irif.fr> <87shcs9k0v.wl-jch@irif.fr> <87po7vud6q.wl-jch@irif.fr> From: Robert Bradley Message-ID: <31d0c3cc-7864-803f-dd49-9e0d9151d12f@gmail.com> Date: Sun, 3 Dec 2017 15:25:44 +0000 User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 In-Reply-To: <87po7vud6q.wl-jch@irif.fr> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Jqxo7NxdNjlPfFaKIPLAfoaXq8bkNqDdB" Subject: Re: [Bloat] [Make-wifi-fast] benefits of ack filtering X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 03 Dec 2017 15:26:14 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --Jqxo7NxdNjlPfFaKIPLAfoaXq8bkNqDdB Content-Type: multipart/mixed; boundary="pBmKHaejAlTFtPihoOrj4uoHS92qJORcG"; protected-headers="v1" From: Robert Bradley To: bloat@lists.bufferbloat.net Message-ID: <31d0c3cc-7864-803f-dd49-9e0d9151d12f@gmail.com> Subject: Re: [Bloat] [Make-wifi-fast] benefits of ack filtering References: <4D0E907C-E15D-437C-B6F7-FF348346D615@gmx.de> <7B92DF4D-B6B5-4A64-9E10-119DCA2D4A6F@ifi.uio.no> <1512037480.19682.10.camel@gmail.com> <6b494910-1373-afb0-5b93-99b725391fb3@gmail.com> <87wp2638yo.fsf@toke.dk> <87tvxa36sn.fsf@toke.dk> <87po7ygxai.fsf@nemesis.taht.net> <87shcui3ni.wl-jch@irif.fr> <87shcs9k0v.wl-jch@irif.fr> <87po7vud6q.wl-jch@irif.fr> In-Reply-To: <87po7vud6q.wl-jch@irif.fr> --pBmKHaejAlTFtPihoOrj4uoHS92qJORcG Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: quoted-printable On 03/12/2017 13:57, Juliusz Chroboczek wrote: > A TCP Ack is 40 bytes. A data packet is up to 1500 bytes. >=20 > As far as I know, DOCSIS has an asymmetry factor that is between 4 and = 10, > depending on the deployment. With worst case asymmetry being 10, this > means that you can send an Ack for every data packet with 400 byte data= > packets, every second data packet with 200 byte data packets. If the > asymmetry is a more reasonable 4, then the figures are 100 and 50 > respectively. >=20 I currently have 230 Mb/s down to 12.7 Mb/s up, so about an 18:1 ratio. That's roughly an ACK for every 750 byte packet. --=20 Robert Bradley --pBmKHaejAlTFtPihoOrj4uoHS92qJORcG-- --Jqxo7NxdNjlPfFaKIPLAfoaXq8bkNqDdB Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) iQIcBAEBAgAGBQJaJBePAAoJEGK/UXZZ8Ak6umgQAIvU0R3RS8cjp9utK7k32yOE KmoXc2ta5ti+v1p93z3FWITl5GrNa9j7si1vg7M6XxFsFDdNMWGV/DOVp9hhpf7l 9ygD3ok6feqJCYm6GrWVFVRoLodCCTRmylt44hPCsfO0Mi/k2cl2ICrGfTmZugWG vEVzfHFjT9r3vg4oW1EFJ0GCNCBvuRX9M/wyIXEXYkUxu1T6tXuihwJMdUVHFRrx pug9w73FE0uzzqKUYAESHlm152aKlLfK2fD8NS24UKqeyja7N6ggHTSFeDv7hM41 ZOfA42rtCQ9pxCdg32cCdNJBsnJBe73BucUJsQ2QQibMz9qoc9prLDjT7ZAhl8ii isbiPsCiYxVdvOCBYhbIlAlkp2DzsPOMwM9DJx4xpZzysj+MH8Is0aQjU49fdrer TL/1o+o8LZybTpm/G4ySVmxAxIgX/zJWJuqhkeWTufPYVHzJf3qNTjef4FRGhiR+ PJfu1fkWLESu16l5vS+Cnqc8X2RMRqXHbvPWOVS/r5qxbaYdT7tva7M0rhsyaTTR TjvT/Z/i9Efd5qIBDeLXhAHtOQgW7uJZPR2brw5UU0ZimbV+04fkB4r7lhdDJPhn ZXRtnLru//d9L6iK7f6E6jjRKb9L2D7k6rocyapYRQ804rcNNTty3Jxi7O2jFqvR /aa4mCXrBM2wKYVyVpZ+ =cdQf -----END PGP SIGNATURE----- --Jqxo7NxdNjlPfFaKIPLAfoaXq8bkNqDdB--