Re: [quicwg/base-drafts] Lost Server Initial Takes Too Long to be Retransmitted (#3078)

Nick Banks <notifications@github.com> Fri, 04 October 2019 00:32 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 CA8101208A4 for <quic-issues@ietfa.amsl.com>; Thu, 3 Oct 2019 17:32:28 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.454
X-Spam-Level:
X-Spam-Status: No, score=-6.454 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_20=1.546, 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 qu2B76mlgq04 for <quic-issues@ietfa.amsl.com>; Thu, 3 Oct 2019 17:32:27 -0700 (PDT)
Received: from out-24.smtp.github.com (out-24.smtp.github.com [192.30.252.207]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3B985120889 for <quic-issues@ietf.org>; Thu, 3 Oct 2019 17:32:27 -0700 (PDT)
Date: Thu, 03 Oct 2019 17:32:26 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1570149146; bh=L5POO67d/Y1fImLIVXLZQxa/53bRaGbcKaGUn6iL0+k=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=SKAZrAKeU5q7kq9oOke46IRI50kiB7vx4oeTYreYAK+rrd+gp6zVUhpdZqFyyRE7f ZmISUsTe8hwykeaxBJ4lKoVgPvxc4JCAc9cLfQprn1jQL9Jxl3vbwnPmoZWk3B+1Tg WelLwNRvs2HDX9X+qdAgMRqZk0OWXNDVuTHFnOf4=
From: Nick Banks <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJKYS23235IYVZGXI42V3UPJ2VEVBNHHB34LR2Y@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/3078/538180770@github.com>
In-Reply-To: <quicwg/base-drafts/issues/3078@github.com>
References: <quicwg/base-drafts/issues/3078@github.com>
Subject: Re: [quicwg/base-drafts] Lost Server Initial Takes Too Long to be Retransmitted (#3078)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5d96931a5bc60_2b543f96e32cd96822010"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: nibanks
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/r9HnxTA5VOoOFUvlTSCD5wnqz40>
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: Fri, 04 Oct 2019 00:32:29 -0000

Yes, but the problem is the worst in this case, because the server doesn't have an RTT estimate, so it can't have an accurate PTO for retransmitting. Once it has received a single ACK, the PTO becomes a lot more accurate, and falling back to the PTO is a lot less painful.

-- 
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/3078#issuecomment-538180770