From owner-freebsd-hackers@FreeBSD.ORG Sun Jul 6 08:46:24 2014 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id E8B4B918; Sun, 6 Jul 2014 08:46:24 +0000 (UTC) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 6C1692DE0; Sun, 6 Jul 2014 08:46:24 +0000 (UTC) Received: from tom.home (kostik@localhost [127.0.0.1]) by kib.kiev.ua (8.14.9/8.14.9) with ESMTP id s668kF6V068052 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sun, 6 Jul 2014 11:46:15 +0300 (EEST) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.8.3 kib.kiev.ua s668kF6V068052 Received: (from kostik@localhost) by tom.home (8.14.9/8.14.9/Submit) id s668kF0h068051; Sun, 6 Jul 2014 11:46:15 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Sun, 6 Jul 2014 11:46:15 +0300 From: Konstantin Belousov To: Adrian Chadd Subject: Re: Strange IO performance with UFS Message-ID: <20140706084615.GC93733@kib.kiev.ua> References: <20140705001938.54a3873dd698080d93d840e2@systemdatarecorder.org> <53B7C616.1000702@citrix.com> <20140705095831.GO93733@kib.kiev.ua> <53B7D4DF.40301@citrix.com> <20140705112448.GQ93733@kib.kiev.ua> <53B8253F.5060403@citrix.com> <20140705195816.GV93733@kib.kiev.ua> <20140706071735.GZ93733@kib.kiev.ua> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="ukxn79E1+tniTzNx" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) X-Spam-Status: No, score=-2.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.0 X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on tom.home Cc: freebsd-fs@freebsd.org, Stefan Parvu , FreeBSD Hackers , Roger Pau Monn? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Jul 2014 08:46:25 -0000 --ukxn79E1+tniTzNx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Jul 06, 2014 at 01:13:29AM -0700, Adrian Chadd wrote: > On 6 July 2014 00:17, Konstantin Belousov wrote: > > On Sat, Jul 05, 2014 at 05:34:48PM -0700, Adrian Chadd wrote: > >> Hm, wait a sec. So if the IO size is a multiple of the underlying FS > >> block size, it should be okay? > > It was already suggested in the thread, and confirmed later. > > Did you read the mails ? >=20 > I did, I must've missed it. SOrry! The thread was definitely long. I am slightly curious how other systems perform in this case. In particular, since fio is originating from Linux, it probably should demonstrate some good behaviour with the default settings. --ukxn79E1+tniTzNx Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBAgAGBQJTuQzXAAoJEJDCuSvBvK1Bx4EP/0CIhDbDLKo2xYiw6d2pIbCd Rj9Izf5EiERXCcdk9iEOGxzplocMuf1zxLd5sx9to4AuBO0c8Wo853z7fjdiFT69 7mPR2jQAyuXMWzNiH5sOrAS2ZpSODnNrziZm2M6coDT+q980jhIzuNZ/91/QUhdm zXCUgbxclI0epbnNnmiTprsV58pEW2I7p2KE1LJ20eBqatQdyh9yAHWL5iP3+XSV 38b6Aux9+ICWoK0qxdLqltXcga9z/vEq7BeGwcio/hzmrZ7KQol7Vwro/tHfKmHT b1L5E9u22cepQvjiHhqXgiXm3maaQqYZKj3AhrfNaFPy9Txu1CRxozY2EL+DykqS 998BJmsQi/H+0ZL7L+g20Ge//flnRD+nk+iSJL1Y4yh4baltcDzHpQMqvBVmVZvC 9dcyaVODpNzUyeOZ8vzrOdhBx2FD6UN4EzNfi8n5hHfcaJU9gYlbWP0981lj1ITT SHYW00YtBPQ0Eqn3HtsTGk1hx3yCknIqB26TwiJHTwIaQ/TnvkBI+ZdArcjpvj3B veFHES+Drzc/Yb6R8ccrmQAzJLdra1sMMM43K1dmPN9mKoLA10HHkZRlJibpCI1U 5k6lk77WmdeUx86MjoYPYlZsAFO+V3d3mcL8+sHvGPticJblGAEFbuLayIp4xiGi w6fEogzflhWANIXMByBk =JtJc -----END PGP SIGNATURE----- --ukxn79E1+tniTzNx--