From nobody Wed Nov 5 14:43:57 2014 Return-Path: X-Original-To: iccrg@ietfa.amsl.com Delivered-To: iccrg@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1ED0D1A00A7 for ; Wed, 5 Nov 2014 14:43:56 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.093 X-Spam-Level: X-Spam-Status: No, score=-1.093 tagged_above=-999 required=5 tests=[BAYES_05=-0.5, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-0.594] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PKAf2FBLF8JI for ; Wed, 5 Nov 2014 14:43:53 -0800 (PST) Received: from mail-out5.uio.no (mail-out5.uio.no [IPv6:2001:700:100:10::17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 405191A008C for ; Wed, 5 Nov 2014 14:43:53 -0800 (PST) Received: from mail-mx1.uio.no ([129.240.10.29]) by mail-out5.uio.no with esmtp (Exim 4.80.1) (envelope-from ) id 1Xm9It-0001ym-Bj for iccrg@irtf.org; Wed, 05 Nov 2014 23:43:51 +0100 Received: from 25.71.202.84.customer.cdi.no ([84.202.71.25] helo=[192.168.0.114]) by mail-mx1.uio.no with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256) user michawe (Exim 4.80) (envelope-from ) id 1Xm9Is-0005Ap-R9 for iccrg@irtf.org; Wed, 05 Nov 2014 23:43:51 +0100 From: Michael Welzl Content-Type: multipart/alternative; boundary="Apple-Mail=_CFD6758A-CCDD-43E3-8455-D0C1FE4FA93A" Message-Id: Date: Wed, 5 Nov 2014 23:43:50 +0100 To: iccrg@irtf.org Mime-Version: 1.0 (Mac OS X Mail 8.0 \(1990.1\)) X-Mailer: Apple Mail (2.1990.1) X-UiO-SPF-Received: X-UiO-Ratelimit-Test: rcpts/h 4 msgs/h 2 sum rcpts/h 9 sum msgs/h 4 total rcpts 22095 max rcpts/h 44 ratelimit 0 X-UiO-Spam-info: not spam, SpamAssassin (score=-5.0, required=5.0, autolearn=disabled, HTML_MESSAGE=0.001, TVD_RCVD_IP=0.001, UIO_MAIL_IS_INTERNAL=-5, uiobl=NO, uiouri=NO) X-UiO-Scanned: 5789863309BE9F879FB92660FA6A13B9EB1887DC X-UiO-SPAM-Test: remote_host: 84.202.71.25 spam_score: -49 maxlevel 80 minaction 2 bait 0 mail/h: 2 total 516 max/h 11 blacklist 0 greylist 0 ratelimit 0 Archived-At: http://mailarchive.ietf.org/arch/msg/iccrg/Lm0j9vBHVjYIaJ39i-TZPlN9UBk Subject: [iccrg] Prepare for a discussion on IW X-BeenThere: iccrg@irtf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Discussions of Internet Congestion Control Research Group \(ICCRG\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 05 Nov 2014 22:43:56 -0000 --Apple-Mail=_CFD6758A-CCDD-43E3-8455-D0C1FE4FA93A Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi all, We have at least two recent proposals for doing something to TCP=E2=80=99s= IW: - a proposal to dynamically configure the initial window (indirectly, by = letting applications specify flow sizes) via a socket option (draft-you-tcpm-configuring-tcp-initial-window-00, to be presented) - a proposal to pace the initial window ( = draft-sallantin-tcpm-initial-spreading-00, presented at the London IETF: = http://www.ietf.org/proceedings/89/slides/slides-89-iccrg-1.pdf = ) Hence, we decided to dedicate a short slot within the ICCRG meeting at = the upcoming IETF to discussing the future of TCP=E2=80=99s IW, see: http://www.ietf.org/proceedings/91/agenda/agenda-91-iccrg = - It would be great if folks could take a look at the drafts mentioned = above and get ready to present their arguments. There is still time on = the agenda, so if someone has a last-minute proposal for a short = presentation, in particular on the IW topic, let us know. Cheers, Michael (and David) --Apple-Mail=_CFD6758A-CCDD-43E3-8455-D0C1FE4FA93A Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Hi all,

We = have at least two recent proposals for doing something to TCP=E2=80=99s = IW:

- a = proposal to dynamically configure the initial window (indirectly, by = letting applications specify flow sizes) via a socket option
(draft-you-tcpm-configuring-tcp-initial-window-00, to = be presented)

- = a proposal to pace the initial window ( draft-sallantin-tcpm-initial-spreading-00, = presented at the London IETF:  http://www.ietf.org/proceedings/89/slides/slides-89-iccrg-1.pdf= )


Hence, we decided to = dedicate a short slot within the ICCRG meeting at the upcoming IETF to = discussing the future of TCP=E2=80=99s IW, see:
http://www.ietf.org/proceedings/91/agenda/agenda-91-iccrg
- It would be great if folks could take a look at the drafts = mentioned above and get ready to present their arguments. There is still = time on the agenda, so if someone has a last-minute proposal for a short = presentation, in particular on the IW topic, let us = know.


Cheers,
Michael (and = David)

= --Apple-Mail=_CFD6758A-CCDD-43E3-8455-D0C1FE4FA93A-- From nobody Thu Nov 6 03:56:24 2014 Return-Path: X-Original-To: iccrg@ietfa.amsl.com Delivered-To: iccrg@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9EA681A1B45 for ; Thu, 6 Nov 2014 03:56:21 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 1.006 X-Spam-Level: * X-Spam-Status: No, score=1.006 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, CHARSET_FARAWAY_HEADER=3.2, MIME_8BIT_HEADER=0.3, RP_MATCHES_RCVD=-0.594] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qF2Iy_Ll4RYT for ; Thu, 6 Nov 2014 03:56:16 -0800 (PST) Received: from mail-out5.uio.no (mail-out5.uio.no [IPv6:2001:700:100:10::17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 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bi4KClRoZXJlJ3MgcmVhbGx5IG5vIHVzZWZ1bCBhbHRlcm5hdGl2ZSwgQUZJQUNULgoKSm9l From nobody Mon Nov 10 17:46:35 2014 Return-Path: X-Original-To: iccrg@ietfa.amsl.com Delivered-To: iccrg@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3FB751AD3C4 for ; Mon, 10 Nov 2014 17:46:33 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 3.094 X-Spam-Level: *** X-Spam-Status: No, score=3.094 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, CHARSET_FARAWAY_HEADER=3.2, CN_BODY_35=0.339, MIME_8BIT_HEADER=0.3, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_LOW=-0.7, RP_MATCHES_RCVD=-0.594, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ay1qYcPJ5oGR for ; Mon, 10 Nov 2014 17:46:30 -0800 (PST) Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [119.145.14.65]) (using TLSv1 with cipher RC4-SHA (128/128 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YnVmZmVyZWQgYWxsIGl0cyBkYXRhIEFORCBjbG9zZWQgdGhlIHNvY2tldCB0bw0KPiBrbm93IC0g Zm9yIHN1cmUgLSBob3cgYmlnIHRoZSB3aW5kb3cgc2hvdWxkIGhhdmUgYmVlbi4NCj4gDQo+IFRo ZXJlJ3MgcmVhbGx5IG5vIHVzZWZ1bCBhbHRlcm5hdGl2ZSwgQUZJQUNULg0KPiANCj4gSm9lDQo+ IF9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fDQo+IGljY3Jn IG1haWxpbmcgbGlzdA0KPiBpY2NyZ0BpcnRmLm9yZw0KPiBodHRwczovL3d3dy5pcnRmLm9yZy9t YWlsbWFuL2xpc3RpbmZvL2ljY3JnDQo= From nobody Tue Nov 11 17:35:54 2014 Return-Path: X-Original-To: iccrg@ietfa.amsl.com Delivered-To: iccrg@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1D6CD1A8A75 for ; Tue, 11 Nov 2014 17:35:52 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -7.495 X-Spam-Level: X-Spam-Status: No, score=-7.495 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-0.594, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, TVD_SPACE_RATIO=0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HQg5EnXi5sVH for ; Tue, 11 Nov 2014 17:35:50 -0800 (PST) Received: from mx12.netapp.com (mx12.netapp.com [216.240.18.77]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id CB5591AC3D3 for ; Tue, 11 Nov 2014 17:35:50 -0800 (PST) X-IronPort-AV: E=Sophos;i="5.07,365,1413270000"; d="scan'208";a="209694537" Received: from hioexcmbx01-prd.hq.netapp.com ([10.122.105.34]) by mx12-out.netapp.com with ESMTP; 11 Nov 2014 17:35:50 -0800 Received: from HIOEXCMBX07-PRD.hq.netapp.com (10.122.105.40) by hioexcmbx01-prd.hq.netapp.com (10.122.105.34) with Microsoft SMTP Server (TLS) id 15.0.995.29; Tue, 11 Nov 2014 17:35:49 -0800 Received: from HIOEXCMBX07-PRD.hq.netapp.com ([::1]) by hioexcmbx07-prd.hq.netapp.com ([fe80::b4c7:ccf8:2c6c:3d39%21]) with mapi id 15.00.0995.031; Tue, 11 Nov 2014 17:35:48 -0800 From: "Eggert, Lars" To: "iccrg@irtf.org" Thread-Topic: RBP Thread-Index: AQHP/hj8V34TG0+dj0KpVT0YRYdoWg== Date: Wed, 12 Nov 2014 01:35:48 +0000 Message-ID: <7A8AB0DB-E899-4998-AC8A-F75E53CDF45F@netapp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.1990.1) x-originating-ip: [10.120.60.35] Content-Type: text/plain; charset="us-ascii" Content-ID: <733782DBEE513D4EAEF54F5396528439@hq.netapp.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/iccrg/-vWrRqpfoflEX-D4ltLLhD4M_uo Cc: John Heidemann Subject: [iccrg] RBP X-BeenThere: iccrg@irtf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Discussions of Internet Congestion Control Research Group \(ICCRG\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Nov 2014 01:35:52 -0000 This is the rate-based pacing that I referred to when draft-sallantin-tcpm-= initial-spreading was presented: http://www.isi.edu/lsam/publications/rate_= based_pacing/ Lars= From nobody Sun Nov 16 06:41:47 2014 Return-Path: X-Original-To: iccrg@ietfa.amsl.com Delivered-To: iccrg@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1CE4C1A00AF for ; Sun, 16 Nov 2014 06:41:46 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.594 X-Spam-Level: X-Spam-Status: No, score=-0.594 tagged_above=-999 required=5 tests=[BAYES_20=-0.001, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-0.594] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3kNDakSkGfUV for ; Sun, 16 Nov 2014 06:41:43 -0800 (PST) Received: from mail-out4.uio.no (mail-out4.uio.no [IPv6:2001:700:100:10::15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 076141A00D8 for ; Sun, 16 Nov 2014 06:41:42 -0800 (PST) Received: from mail-mx6.uio.no ([129.240.10.40]) by mail-out4.uio.no with esmtp (Exim 4.80.1) (envelope-from ) id 1Xq11I-00032t-5j for iccrg@irtf.org; Sun, 16 Nov 2014 15:41:40 +0100 Received: from [31.221.87.87] (helo=[10.32.168.71]) by mail-mx6.uio.no with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256) user michawe (Exim 4.80.1) (envelope-from ) id 1Xq11H-00071L-Kh for iccrg@irtf.org; Sun, 16 Nov 2014 15:41:40 +0100 From: Michael Welzl Content-Type: multipart/alternative; boundary="Apple-Mail=_EB2D393B-5D23-434B-87B7-CD22C9A5AE58" Message-Id: Date: Sun, 16 Nov 2014 14:41:44 +0000 To: iccrg@irtf.org Mime-Version: 1.0 (Mac OS X Mail 8.0 \(1990.1\)) X-Mailer: Apple Mail (2.1990.1) X-UiO-SPF-Received: X-UiO-Ratelimit-Test: rcpts/h 12 msgs/h 4 sum rcpts/h 13 sum msgs/h 5 total rcpts 22600 max rcpts/h 44 ratelimit 0 X-UiO-Spam-info: not spam, SpamAssassin (score=-5.0, required=5.0, autolearn=disabled, HTML_MESSAGE=0.001, UIO_MAIL_IS_INTERNAL=-5, uiobl=NO, uiouri=NO) X-UiO-Scanned: 5E2E84164AFE63EE010DDCD1D0739A398ED26CB8 X-UiO-SPAM-Test: remote_host: 31.221.87.87 spam_score: -49 maxlevel 80 minaction 2 bait 0 mail/h: 4 total 200 max/h 10 blacklist 0 greylist 0 ratelimit 0 Archived-At: http://mailarchive.ietf.org/arch/msg/iccrg/wcPyiFFo1-mrM49n3nzyW8ybRQA Subject: [iccrg] Meeting minutes - please check X-BeenThere: iccrg@irtf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Discussions of Internet Congestion Control Research Group \(ICCRG\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 16 Nov 2014 14:41:46 -0000 --Apple-Mail=_EB2D393B-5D23-434B-87B7-CD22C9A5AE58 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi all, The meeting minutes are now available from: http://www.ietf.org/proceedings/91/minutes/minutes-91-iccrg = Please check them and let us know about any necessary fixes. Thanks to = Stein Gjessing and Naeem Khademi for their efforts! Cheers, Michael --Apple-Mail=_EB2D393B-5D23-434B-87B7-CD22C9A5AE58 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=us-ascii Hi all,

The meeting minutes are now available from:

Please check them and let us know about any necessary fixes. Thanks to Stein Gjessing and Naeem Khademi for their efforts!

Cheers,
Michael

--Apple-Mail=_EB2D393B-5D23-434B-87B7-CD22C9A5AE58-- From nobody Mon Nov 17 08:06:23 2014 Return-Path: X-Original-To: iccrg@ietfa.amsl.com Delivered-To: iccrg@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0BDA71A6FFE for ; Mon, 17 Nov 2014 08:06:20 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.999 X-Spam-Level: X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 21zPHlXHCb6w for ; Mon, 17 Nov 2014 08:06:15 -0800 (PST) Received: from mail-qg0-x231.google.com (mail-qg0-x231.google.com [IPv6:2607:f8b0:400d:c04::231]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 5E2B01A7022 for ; Mon, 17 Nov 2014 08:06:12 -0800 (PST) Received: by mail-qg0-f49.google.com with SMTP id a108so3644654qge.36 for ; Mon, 17 Nov 2014 08:06:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=qikuj9mOQAMDEeoD2ejo+Re/Tb+a0ftVPqcDJ4ny6Ls=; b=VYdT5KfQx8xHNlOrFiRWu+nrh1H77rHkdqpUcLlavMP8YFirvihCbwJTi1doQtOrCn uliBgaKyfeAR6iUWwtj6T2HrhzjybOi0TtkAYhXHTgJPtM8TIWDDUiAPnq5Ut7P0G+db IkOBaD59/pNc2LmNha9KMFbkYbkm+uUH62wnUSiWMGwN2/K0t7yaorSEhNF0ryklp1fH YKdQ10sDiyCTvkE+vHAD4lA6DFoVqQSNYOgPpEj5UdXJBe+K/LeOXR6bE0F9fSFELqw4 8Y3o6Jz9YpZ+pvttYF8PN25I+1/dmNoPPIaJ/mqpEzMZpCqAn69sudk8v2YTdd31piL6 IThQ== MIME-Version: 1.0 X-Received: by 10.224.99.7 with SMTP id s7mr22623561qan.2.1416240370704; Mon, 17 Nov 2014 08:06:10 -0800 (PST) Received: by 10.140.240.198 with HTTP; Mon, 17 Nov 2014 08:06:10 -0800 (PST) Date: Mon, 17 Nov 2014 11:06:10 -0500 Message-ID: From: renaud sallantin To: iccrg@irtf.org Content-Type: multipart/alternative; boundary=001a11c2394836695b05081028a3 Archived-At: http://mailarchive.ietf.org/arch/msg/iccrg/9F2XCCbLyrM1I7BdDjIy98FfzeQ Subject: [iccrg] Information on Initial Spreading X-BeenThere: iccrg@irtf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Discussions of Internet Congestion Control Research Group \(ICCRG\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Nov 2014 16:06:20 -0000 --001a11c2394836695b05081028a3 Content-Type: text/plain; charset=UTF-8 Dear all, We just received your responses to the short presentation Michael Welzl did in the last ICCRG meeting, and would like to thank you. Reading your comments, we would like to specify some points about Initial Spreading and notably the main differences with the Pacing. We limit the spreading to the IW because it has been shown that the Pacing downgrades the long lived flows performance. *Understanding the Performance of TCP Pacing, Amit Aggarwal, Stefan Savage, and Thomas Anderson. IEEE INFOCOM 2000 Conference on Computer Communications, March 2000, pages 1157 - 1165. * Unlike Pacing, we use a bounded spreading time. This enables two major improvements: - The performance is not mitigated by a wrong RTT measurement - The performance remains good for all kind of network. For example, considering a long latency, we use a spreading time sufficient to not suffer from the bursts but small enough to not add an unnecessary delay. In case of short latency, we use the regular pacing time (RTT/IW) You can find further details here: https://tools.ietf.org/html/draft-sallantin-tcpm-initial-spreading-00 We are really interested in receiving your feedback. Regards, Renaud Sallantin PS : We are not sure if we should continue this discussion on the ICCRG list or (and) in the TCPM list? --001a11c2394836695b05081028a3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
=09 =09 =09

Dear all,

We just received your responses to the short presentation Michael Welzl did in the last ICCRG meeting, and would like to thank you.=C2=A0
Reading your comments, we would like to specify some points about Initial Spreading and notably the main differences with the Pacing.

=C2=A0We limit the spreading to the IW because it has been shown that the Pacing downgrades the long lived flows performance.=C2=A0
Understanding the Performance of TCP Pacing,=C2=A0Amit Aggarwal, Stefan Savage, and Thomas Anderson.=C2=A0=C2=A0IEEE INFOCOM 2000 Con= ference on Computer Communications,=C2=A0March 2000, pages 1= 157 - 1165.=C2=A0

Unlike Pacing, we use a b= ounded spreading time. This enables two major improvements:

  • The performance is not mitigated by a wrong RTT measurement

  • The performance remains good for all kind of network.=C2=A0

For example, considering a long=C2=A0latency,=C2=A0=C2=A0we use a spreading time sufficient to not suffer from the bursts but small enough to not add an unnecessary delay.=C2=A0In case of short=C2=A0latency,=C2=A0we use the regular pacing time (RTT/IW)=C2=A0

You can find further details here:=C2=A0https://tools.ietf.org/html/draft-sallantin-tcpm-initial-spreadi= ng-00

=C2=A0We are really interested in receiving your feedback.

Regards,=C2=A0
= Renaud Sallantin

=C2=A0PS : We are not sure if we should continue this discussion on the ICCRG list or=C2=A0(and)=C2=A0in the TCPM list?


--001a11c2394836695b05081028a3-- From nobody Fri Nov 21 11:44:18 2014 Return-Path: X-Original-To: iccrg@ietfa.amsl.com Delivered-To: iccrg@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 333A61A1B72 for ; Fri, 21 Nov 2014 11:44:17 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 4.688 X-Spam-Level: **** X-Spam-Status: No, score=4.688 tagged_above=-999 required=5 tests=[BAYES_50=0.8, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, FRT_STOCK2=3.988, SPF_PASS=-0.001] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZSVoSilXuSTE for ; Fri, 21 Nov 2014 11:44:15 -0800 (PST) Received: from mail-ob0-x22d.google.com (mail-ob0-x22d.google.com [IPv6:2607:f8b0:4003:c01::22d]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7B8FD1A1B6F for ; Fri, 21 Nov 2014 11:44:15 -0800 (PST) Received: by mail-ob0-f173.google.com with SMTP id uy5so4550853obc.4 for ; Fri, 21 Nov 2014 11:44:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=qAnSdT3/ZlD37hvn4FDgi8Ulxys7eq4+Ndz1E7HdbLc=; b=03nEDaAgrQu7rB/Sh8OpIAD69wwNCaMAhbfdLwqgaxWMklRDDwZWUOu4WIe/U6aW5N zwpFaxISiE+GSiYT3k5xqFhyFvhL4AJbbi6xQsQf1vTN9pDDorlsj11p7wR4T2jF7E/1 flx4ha03drpsQuJ7llItTIJ1ifJboaMMcVq2H9rAnvAfgJxwD+gJQ9ewlHmb3/CqKr7O Du/Tc6ssS/qz3HbmXKCuaz/E12MJwxQv4QMl3XV/ASEhau2z0/w1iCvtFwIeei3LPxfW +xG4OxB++urV6bAwBpYNA7eBdYCHOXGw9P8y/yRKWTswdHNDhdXqqBRTLtksm1FXRulO 4Vow== MIME-Version: 1.0 X-Received: by 10.60.173.240 with SMTP id bn16mr4308166oec.41.1416599054627; Fri, 21 Nov 2014 11:44:14 -0800 (PST) Received: by 10.202.227.211 with HTTP; Fri, 21 Nov 2014 11:44:14 -0800 (PST) In-Reply-To: References: Date: Fri, 21 Nov 2014 11:44:14 -0800 Message-ID: From: Dave Taht To: Michael Welzl Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Archived-At: http://mailarchive.ietf.org/arch/msg/iccrg/O8bzpzgIqznFEeJ065nEX041rf0 Cc: "iccrg@irtf.org" Subject: Re: [iccrg] Meeting minutes - please check X-BeenThere: iccrg@irtf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Discussions of Internet Congestion Control Research Group \(ICCRG\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 21 Nov 2014 19:44:17 -0000 Typo correction: s/scad-fq/sch_fq/ was implemented in linux 3.12 see http://lwn.net/Articles/564825/ for benchmarks. The pacing setsockopt: http://comments.gmane.org/gmane.linux.network/284527= . (It would be good for the internet research community to be paying attention to lwn - subscriptions are cheap (and all articles are available for free 2 weeks after publication). It is worth 10 other journals I care not to mention, and it comes out on wednesday evenings every week, and takes about an hour to read.) ietf preso on these things: http://www.ietf.org/proceedings/88/slides/slides-88-tcpm-9.pdf Give the authorship of sch_fq, it is not rocket science to guess one place where this is deployed widely. From: Eric Dumazet Fair Queue packet scheduler with optional per flow rate shaping. - Uses perfect flow match (not stochastic hash like SFQ/FQ_codel) - Uses the new_flow/old_flow separation from FQ_codel - Special FIFO queue for high prio packets (no need for PRIO + FQ) - Uses a hash table of RB trees to locate the flows at enqueue() time - Smart on demand gc (at enqueue() time, RB tree lookup evicts old unused flows) - Dynamic memory allocations. - Designed to allow millions of concurrent flows per Qdisc. - Small memory footprint : ~2K per Qdisc, and 96 bytes per flow. - Single high resolution timer for throttled flows (if any). - One RB tree to link throttled flows. - Ability to have a max rate per flow. We might add a socket option to add per socket limitation. Attempts have been made to add TCP pacing in TCP stack, but this seems to add complex code to an already complex stack. TCP pacing is welcomed for flows having idle times, as the cwnd permits TCP stack to queue a possibly large number of packets. --=20 Dave T=C3=A4ht http://www.bufferbloat.net/projects/bloat/wiki/Upcoming_Talks On Sun, Nov 16, 2014 at 6:41 AM, Michael Welzl wrote: > Hi all, > > The meeting minutes are now available from: > http://www.ietf.org/proceedings/91/minutes/minutes-91-iccrg > > Please check them and let us know about any necessary fixes. Thanks to St= ein > Gjessing and Naeem Khademi for their efforts! > > Cheers, > Michael > > > _______________________________________________ > iccrg mailing list > iccrg@irtf.org > https://www.irtf.org/mailman/listinfo/iccrg > --=20 Dave T=C3=A4ht thttp://www.bufferbloat.net/projects/bloat/wiki/Upcoming_Talks