From owner-freebsd-net@FreeBSD.ORG Wed Aug 14 23:29:16 2013 Return-Path: Delivered-To: net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id D36F25BB; Wed, 14 Aug 2013 23:29:16 +0000 (UTC) (envelope-from lars@netapp.com) Received: from mx11.netapp.com (mx11.netapp.com [216.240.18.76]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 95A832EFE; Wed, 14 Aug 2013 23:29:16 +0000 (UTC) X-IronPort-AV: E=Sophos;i="4.89,880,1367996400"; d="asc'?scan'208";a="41552649" Received: from vmwexceht03-prd.hq.netapp.com ([10.106.76.241]) by mx11-out.netapp.com with ESMTP; 14 Aug 2013 16:29:09 -0700 Received: from SACEXCMBX01-PRD.hq.netapp.com ([169.254.2.240]) by vmwexceht03-prd.hq.netapp.com ([10.106.76.241]) with mapi id 14.03.0123.003; Wed, 14 Aug 2013 16:29:09 -0700 From: "Eggert, Lars" To: Lawrence Stewart Subject: Re: TCP Initial Window 10 MFC (was: Re: svn commit: r252789 - stable/9/sys/netinet) Thread-Topic: TCP Initial Window 10 MFC (was: Re: svn commit: r252789 - stable/9/sys/netinet) Thread-Index: AQHOmJho/QNBxT9cUU6iUzIYTWLwbZmU2b+AgAD2kAA= Date: Wed, 14 Aug 2013 23:29:09 +0000 Message-ID: References: <201307051458.r65EwObo066269@svn.freebsd.org> <520AED2F.4050001@freebsd.org> <918804B0-BED8-4E49-9D70-01DDA6F257B3@netapp.com> In-Reply-To: <918804B0-BED8-4E49-9D70-01DDA6F257B3@netapp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.104.60.118] Content-Type: multipart/signed; boundary="Apple-Mail=_7A75FD23-B918-4EC4-A7E3-A49AF46E2F69"; protocol="application/pgp-signature"; micalg=pgp-sha1 MIME-Version: 1.0 Cc: Andre Oppermann , "freebsd-net@freebsd.org" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Aug 2013 23:29:16 -0000 --Apple-Mail=_7A75FD23-B918-4EC4-A7E3-A49AF46E2F69 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Oh: The other interesting bit is that Chrome defaulted to telling the = server to use IW32 if it had no cached value... I think Google are still heavily tweaking the mechanisms. Lars On Aug 14, 2013, at 16:46, "Eggert, Lars" wrote: > Hi, >=20 > On Aug 14, 2013, at 10:36, Lawrence Stewart = wrote: >> I don't think this change should have been MFCed, at least not in its >> current form. >=20 > FYI, Google's own data as presented in the HTTPBIS working group of = the recent Berlin IETF shows that 10 is too high for ~25% of their web = connections: see slide 2 of = http://www.ietf.org/proceedings/87/slides/slides-87-httpbis-5.pdf >=20 > (That slide shows a CDF of CWND values the server used at the end of a = web transaction.) >=20 > Lars --Apple-Mail=_7A75FD23-B918-4EC4-A7E3-A49AF46E2F69 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="signature.asc" Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQCVAwUBUgwSxtZcnpRveo1xAQLO+wP+JVPzI+MwO7t1ICSbdK3jo77rVtQGvHXM bb9q8dwL5YCvSjYCMb/XaKKkwuGbwIgewg1ET0c6luJoETu0KAGZbyQbq7cF43cU 2JcKFd4afdue+htr8elm7tXic2ttmyCOIyASn3aWHidgO83HcmS7w48azdP3U3YF 9BGKzC/g+8g= =vPGM -----END PGP SIGNATURE----- --Apple-Mail=_7A75FD23-B918-4EC4-A7E3-A49AF46E2F69--