[quicwg/base-drafts] Safety issue during incipient persistent congestion episode (#3259)
Praveen Balasubramanian <notifications@github.com> Mon, 18 November 2019 23:52 UTC
Return-Path: <noreply@github.com>
X-Original-To: quic-issues@ietfa.amsl.com
Delivered-To: quic-issues@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8738912090A for <quic-issues@ietfa.amsl.com>; Mon, 18 Nov 2019 15:52:29 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.382
X-Spam-Level:
X-Spam-Status: No, score=-6.382 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_IMAGE_ONLY_24=1.618, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=github.com
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 E4G4ApwA9co8 for <quic-issues@ietfa.amsl.com>; Mon, 18 Nov 2019 15:52:28 -0800 (PST)
Received: from out-23.smtp.github.com (out-23.smtp.github.com [192.30.252.206]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C8E4F12018B for <quic-issues@ietf.org>; Mon, 18 Nov 2019 15:52:27 -0800 (PST)
Received: from github-lowworker-2300405.va3-iad.github.net (github-lowworker-2300405.va3-iad.github.net [10.48.17.39]) by smtp.github.com (Postfix) with ESMTP id CFD6F6609FB for <quic-issues@ietf.org>; Mon, 18 Nov 2019 15:52:26 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1574121146; bh=DpdJH9vT4g1/nuDpbG5D00XgN5GVZ5Ca4LDITuzkUWY=; h=Date:From:Reply-To:To:Cc:Subject:List-ID:List-Archive:List-Post: List-Unsubscribe:From; b=g6163UayNJZMz5uiPdRAtOMDvfVaC2hNDSdUZxM57aPLqkRpgWvo82lJdR9egGnGG 94adEI+XTSVjDpg2uB9gXogS9/EobER9Gzc1lP/N5jhm8LxijaDKuF95oImrH/rXHc StED+H541XSjz0oypL559yJrBzWLv62S3KWhfOl4=
Date: Mon, 18 Nov 2019 15:52:26 -0800
From: Praveen Balasubramanian <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJK5PL4BUZFIBU66X4SV34BQTVEVBNHHB6RQ4VA@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/3259@github.com>
Subject: [quicwg/base-drafts] Safety issue during incipient persistent congestion episode (#3259)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5dd32ebac0910_7b213fcd722cd95c873a7"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: pravb
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
X-GitHub-Recipient-Address: quic-issues@ietf.org
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic-issues/N03iliivuszthsEBUBWhnhszvq4>
X-BeenThere: quic-issues@ietf.org
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <quic-issues.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/quic-issues/>
List-Post: <mailto:quic-issues@ietf.org>
List-Help: <mailto:quic-issues-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 18 Nov 2019 23:52:30 -0000
"When an ACK frame is received that establishes loss of all in-flight packets sent over a long enough period of time, the network is considered to be experiencing persistent congestion." QUIC declares persistent congestion only upon receipt of an ACK for a packet sent after entering loss recovery. This means that the cwnd will remain large and usable even if there is prolonged network silence with packets outstanding. If the state of the transport was application limited, this can cause a large burst on the network. In TCP, an RTO causes immediate drop of the cwnd to min_cwnd. Ideally QUIC should drop the cwnd in the same timescale as TCP would. Typically minrto for the Internet is 200 msec or 300 msec (and larger if the RTT is larger). -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/quicwg/base-drafts/issues/3259
- [quicwg/base-drafts] Safety issue during incipien… Praveen Balasubramanian
- Re: [quicwg/base-drafts] Safety issue during inci… Martin Thomson
- Re: [quicwg/base-drafts] Safety issue during inci… ianswett
- Re: [quicwg/base-drafts] Safety issue during inci… Lars Eggert
- Re: [quicwg/base-drafts] Safety issue during inci… Lucas Pardue
- Re: [quicwg/base-drafts] Safety issue during inci… ianswett