Return-Path: X-Original-To: multipathtcp@ietfa.amsl.com Delivered-To: multipathtcp@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A83A112B0A2; Mon, 26 Sep 2016 00:40:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.216 X-Spam-Level: X-Spam-Status: No, score=-4.216 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RP_MATCHES_RCVD=-2.316] autolearn=ham autolearn_force=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 gZrGNUAmv_5g; Mon, 26 Sep 2016 00:40:56 -0700 (PDT) Received: from mail-out01.uio.no (mail-out01.uio.no [IPv6:2001:700:100:10::50]) (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 2E19D12B09F; Mon, 26 Sep 2016 00:40:55 -0700 (PDT) Received: from mail-mx4.uio.no ([129.240.10.45]) by mail-out01.uio.no with esmtp (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1boQWz-0007Ky-K6; Mon, 26 Sep 2016 09:40:53 +0200 Received: from boomerang.ifi.uio.no ([129.240.68.135]) by mail-mx4.uio.no with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256) user michawe (Exim 4.80) (envelope-from ) id 1boQWz-0005i4-6X; Mon, 26 Sep 2016 09:40:53 +0200 From: Michael Welzl Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Date: Mon, 26 Sep 2016 09:40:51 +0200 Message-Id: <7A111AD3-3E4C-43D1-999A-F383428103AC@ifi.uio.no> To: multipathtcp@ietf.org, iccrg@irtf.org Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) X-Mailer: Apple Mail (2.2104) X-UiO-SPF-Received: X-UiO-Ratelimit-Test: rcpts/h 7 msgs/h 2 sum rcpts/h 7 sum msgs/h 2 total rcpts 46667 max rcpts/h 54 ratelimit 0 X-UiO-Spam-info: not spam, SpamAssassin (score=-6.2, required=5.0, autolearn=disabled, RP_MATCHES_RCVD=-1.21, UIO_MAIL_IS_INTERNAL=-5, uiobl=NO, uiouri=NO) X-UiO-Scanned: CA91EA3ECAC00D0B2052FA2F86BD40368B287EED X-UiO-SPAM-Test: remote_host: 129.240.68.135 spam_score: -61 maxlevel 80 minaction 1 bait 0 mail/h: 2 total 11187 max/h 21 blacklist 0 greylist 0 ratelimit 0 Archived-At: Subject: [multipathtcp] LISA - Linked Slow-Start for MPTCP => ICCRG X-BeenThere: multipathtcp@ietf.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Multi-path extensions for TCP List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Sep 2016 07:40:59 -0000 Dear all, LISA is a simple algorithm that couples MPTCP subflows in slow-start, to = reduce bursts that happen when multiple sub-flows start up with a delay = and all send their IW, all in SS. We found this effect to be generally bad (i.e., improved with LISA :-) ) = when subflows do share a bottleneck, and we find that this slightly more = conservative behavior also doesn't hurt (actually, sometimes it's a = benefit) when they do *not* share a bottleneck. After all, slow-start is = very aggressive anyway - is it really so important for the 2nd, 3rd... = subflow of MPTCP to be *that* aggressive? We presented it to MPTCP at the last IETF, and in Yokohama. There's a draft: https://tools.ietf.org/html/draft-barik-mptcp-lisa-01 and a page with slides, a published paper with results, and code: = http://heim.ifi.uio.no/runabk/lisa/ The way ahead, as agreed with the MPTCP chairs, is to either publish via = MPTCP if their future charter will allow, or else publish this via = ICCRG. Either way, for now, discussion of this draft should happen in the ICCRG = mailing list. We authors would greatly appreciate feedback - so far, we = didn't get many comments! Cheers, Michael (with Runa & Simone)