From owner-svn-src-all@freebsd.org Thu Jun 30 00:01:32 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8BA52B8745E; Thu, 30 Jun 2016 00:01:32 +0000 (UTC) (envelope-from bdrewery@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) by mx1.freebsd.org (Postfix) with ESMTP id 6E9302E6B; Thu, 30 Jun 2016 00:01:32 +0000 (UTC) (envelope-from bdrewery@FreeBSD.org) Received: from mail.xzibition.com (localhost [IPv6:::1]) by freefall.freebsd.org (Postfix) with ESMTP id 67B1A1D0E; Thu, 30 Jun 2016 00:01:32 +0000 (UTC) (envelope-from bdrewery@FreeBSD.org) Received: from mail.xzibition.com (localhost [172.31.3.2]) by mail.xzibition.com (Postfix) with ESMTP id 1B09D233F2; Thu, 30 Jun 2016 00:01:32 +0000 (UTC) X-Virus-Scanned: amavisd-new at mail.xzibition.com Received: from mail.xzibition.com ([172.31.3.2]) by mail.xzibition.com (mail.xzibition.com [172.31.3.2]) (amavisd-new, port 10026) with LMTP id UGwrLVY-YFKU; Thu, 30 Jun 2016 00:01:29 +0000 (UTC) Subject: Re: svn commit: r302288 - head/release/tools DKIM-Filter: OpenDKIM Filter v2.9.2 mail.xzibition.com BB3F1233ED To: Colin Percival , src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org References: <201606292356.u5TNuODh057121@repo.freebsd.org> From: Bryan Drewery Openpgp: id=F9173CB2C3AAEA7A5C8A1F0935D771BB6E4697CF; url=http://www.shatow.net/bryan/bryan2.asc Organization: FreeBSD Message-ID: <7a41dac2-87b8-c255-391d-fce3d57e835a@FreeBSD.org> Date: Wed, 29 Jun 2016 17:01:28 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 MIME-Version: 1.0 In-Reply-To: <201606292356.u5TNuODh057121@repo.freebsd.org> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="kFAJlTvqXbleNAlEF6hDkXpRO6RcgDN24" X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Jun 2016 00:01:32 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --kFAJlTvqXbleNAlEF6hDkXpRO6RcgDN24 Content-Type: multipart/mixed; boundary="tUvFVvcWuusfVLbU95PubWgdOKgVx7iNk" From: Bryan Drewery To: Colin Percival , src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Message-ID: <7a41dac2-87b8-c255-391d-fce3d57e835a@FreeBSD.org> Subject: Re: svn commit: r302288 - head/release/tools References: <201606292356.u5TNuODh057121@repo.freebsd.org> In-Reply-To: <201606292356.u5TNuODh057121@repo.freebsd.org> --tUvFVvcWuusfVLbU95PubWgdOKgVx7iNk Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 6/29/2016 4:56 PM, Colin Percival wrote: > Author: cperciva > Date: Wed Jun 29 23:56:24 2016 > New Revision: 302288 > URL: https://svnweb.freebsd.org/changeset/base/302288 >=20 > Log: > Enable indirect segment I/Os by default in the Xen blkfront driver wh= en > running on EC2. Due to improvements in EC2, the performance penalty = which > was present on some EC2 instances no longer exists, and enabling this= > feature now consistently yields ~20% higher throughput with equal or = lower > latency. Does this rely on any driver updates / is it safe to make the same change on my existing 10.2 system? > =20 > Reverts: r286063 > Approved by: re (gjb) > MFC after: 2 weeks > Relnotes: Improved disk throughput on EC2 >=20 > Modified: > head/release/tools/ec2.conf >=20 > Modified: head/release/tools/ec2.conf > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D > --- head/release/tools/ec2.conf Wed Jun 29 23:33:44 2016 (r302287) > +++ head/release/tools/ec2.conf Wed Jun 29 23:56:24 2016 (r302288) > @@ -72,11 +72,6 @@ vm_extra_pre_umount() { > # nodes, but apply the workaround just in case. > echo 'hw.broken_txfifo=3D"1"' >> ${DESTDIR}/boot/loader.conf > =20 > - # Some EC2 instances suffer a significant (~40%) reduction in > - # throughput when using blkif indirect segment I/Os. Disable this > - # by default for now. > - echo 'hw.xbd.xbd_enable_indirect=3D"0"' >> ${DESTDIR}/boot/loader.con= f > - > # Some EC2 instances run on a version of Xen which has a bug relating= > # to the migration of MSI-X interrupts; this is visible as SR-IOV > # networking (aka. "EC2 Enhanced Networking") not being able to pass >=20 --=20 Regards, Bryan Drewery --tUvFVvcWuusfVLbU95PubWgdOKgVx7iNk-- --kFAJlTvqXbleNAlEF6hDkXpRO6RcgDN24 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBAgAGBQJXdGFYAAoJEDXXcbtuRpfPhOQIANnWpgD14s0bbiapmsAXohGL Aw4ZpTz0SNKF4z7bBFdFDWFuUoFdqXDsmz8CLDQCFFqWL3Okph+49A52jWvKLC+B ovnGP9M+qook/a8J7QM75yrJUxOgK6Q1JmFaO5H8D7WYVKGnNvKTL10mzzsJ6unI Wu7en3JbEAhSnRygmDybSSneVlQorCntQg0JCLYM4blclX2bHASE0TvvQjBVksP7 FkAmN1/qWe+/wz98n7RR6rRgZQGMRTJ+0UsZrk2uW3CjscVIiAK0UygXcur9DKJC K0ADT8iVo28hY8QSoQ/3iXu/1bGP9G2TymFgqGrGSffV37bVOIQS8mkAjoc+19I= =oAHN -----END PGP SIGNATURE----- --kFAJlTvqXbleNAlEF6hDkXpRO6RcgDN24--