Re: [quicwg/base-drafts] Document TCP RTO vs QUIC PTO (#3441)
Jana Iyengar <notifications@github.com> Wed, 04 March 2020 00:59 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 728063A09DA for <quic-issues@ietfa.amsl.com>; Tue, 3 Mar 2020 16:59:06 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.1
X-Spam-Level:
X-Spam-Status: No, score=-3.1 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, DKIM_VALID_EF=-0.1, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, 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 rMOoCquXaU2D for <quic-issues@ietfa.amsl.com>; Tue, 3 Mar 2020 16:59:04 -0800 (PST)
Received: from out-27.smtp.github.com (out-27.smtp.github.com [192.30.252.210]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 727D13A09D7 for <quic-issues@ietf.org>; Tue, 3 Mar 2020 16:59:04 -0800 (PST)
Date: Tue, 03 Mar 2020 16:59:02 -0800
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1583283542; bh=Meld+0rNXFLhKDY7b001E5lxexzBxhc6Sho2MhfS0PM=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=eeBUQ333ZTODoFFLqFaGnAXlpio2cwny4OrzF5QtaEMCHIVUWBJQWc1YTiHNc/P8G +80e9eUUrostTYiUJUyZCbEwGFhV+bS+Tll6RnIOloGn7TP6i+msEywlWLcekrgJ2M DAAUOwbbNJTp9h/qRuT+hmTE9KB8at+MxplGogtY=
From: Jana Iyengar <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJK7L7ZPJHH5FT7R64QN4NLPFNEVBNHHCC7S66M@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/pull/3441/review/368435666@github.com>
In-Reply-To: <quicwg/base-drafts/pull/3441@github.com>
References: <quicwg/base-drafts/pull/3441@github.com>
Subject: Re: [quicwg/base-drafts] Document TCP RTO vs QUIC PTO (#3441)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5e5efd56d7334_ca43f98d88cd95c5053a"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: janaiyengar
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/xQNnelXdIJFBhIkev4Ytwk5Mtow>
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: Wed, 04 Mar 2020 00:59:08 -0000
janaiyengar commented on this pull request. > +window whenever the timer expires. In practice, this is similar to TCP with +F-RTO, but it does allow more packets to be sent when the congestion window was +not fully utilized prior to the probe timeout expiring. Though this is slightly +more aggressive than TCP RTO, it's less aggressive than if the connection was +not application limited. ```suggestion window whenever the timer expires. In doing this, QUIC avoids congestion window reductions that might otherwise be caused by spurious retransmissions, obviating the need for correcting mechanisms such as F-RTO {{cite}}. Since QUIC does not collapse the congestion window on a PTO expiration, a QUIC sender is not limited from sending more application data after a PTO expiration. A sender could be application-limited, have a PTO timer expire, and then send as much application data as the congestion window allows after. At first glance this might seem to be more aggressive than TCP's RTO mechanism, where a sender is effectively limited to sending a single packet after an RTO expiration. However, TCP's RTO period is more accurately modeled in QUIC by the persistent congestion event, after which QUIC also limits the sender's congestion window. ``` -- 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/pull/3441#pullrequestreview-368435666
- [quicwg/base-drafts] Document TCP RTO vs QUIC PTO… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Nick Banks
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Martin Thomson
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Martin Thomson
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Jana Iyengar
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Jana Iyengar
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Jana Iyengar
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Jana Iyengar
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Martin Thomson
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Martin Thomson
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Jana Iyengar
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Martin Thomson
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Martin Thomson
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… Lars Eggert
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… ianswett
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… MikkelFJ
- Re: [quicwg/base-drafts] Document TCP RTO vs QUIC… MikkelFJ