From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.62) (envelope-from ) id 1HF6w7-0006v4-Gx for garchives@archives.gentoo.org; Thu, 08 Feb 2007 10:55:32 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.14.0/8.14.0) with SMTP id l18ArQcP011776; Thu, 8 Feb 2007 10:53:26 GMT Received: from mx1.polytechnique.org (mx1.polytechnique.org [129.104.30.34]) by robin.gentoo.org (8.14.0/8.14.0) with ESMTP id l18AihBw029486 for ; Thu, 8 Feb 2007 10:44:45 GMT Received: from [138.231.65.142] (agena.lpqm.ens-cachan.fr [138.231.65.142]) (using SSLv3 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by ssl.polytechnique.org (Postfix) with ESMTP id 74A0633177 for ; Thu, 8 Feb 2007 11:44:42 +0100 (CET) Subject: Re: [gentoo-user] Performance problem at writing big files and Multitasking From: =?ISO-8859-1?Q?Fr=E9d=E9ric?= Grosshans To: gentoo-user@lists.gentoo.org In-Reply-To: <45C8F2FE.9050902@googlemail.com> References: <6142e6140702061231x5a517c2fvf29f87efacb2f576@mail.gmail.com> <200702062216.45220.shrdlu@unlimitedmail.org> <45C8F2FE.9050902@googlemail.com> Content-Type: text/plain; charset=ISO-8859-15 Date: Thu, 08 Feb 2007 11:42:28 +0100 Message-Id: <1170931348.19393.1.camel@localhost> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org Mime-Version: 1.0 X-Mailer: Evolution 2.8.2.1 X-AV-Checked: ClamAV using ClamSMTP at djali.polytechnique.org (Thu Feb 8 11:44:42 2007 +0100 (CET)) X-Spam-Flag: No, tests=bogofilter, spamicity=0.287846, queueID=88FEC3317A X-Org-Mail: frederic.grosshans.1995@polytechnique.org Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by robin.gentoo.org id l18ArQcd011776 X-Archives-Salt: 3f21bad5-3cc7-433e-b28b-239d189b2359 X-Archives-Hash: 0d956885b5ed0453ac9c60a16fe70f93 Le mardi 06 f=E9vrier 2007 =E0 22:28 +0100, Daniel Pielmeier a =E9crit : > > What I/O scheduler are you using? Did you try to experiment with the=20 > > deadline or the cfq I/O schedulers? > > If you have them enabled in your kernel config, read=20 > > Documentation/block/switching-sched.txt and see if things get better=20 > > after changing the I/O scheduler for your hard disk. > > Of course, your problem might be caused by something else altogether. >=20 > At the moment i use the CFQ-scheduler others are not compiled in the > kernel, I will compile one and tell you if this gives any improvements. Did you try to play with ionice to assign priority. It has helped me a lot with io-intensive background taskes. Fred --=20 gentoo-user@gentoo.org mailing list