From mboxrd@z Thu Jan 1 00:00:00 1970 From: Islam Amer Subject: Re: iosched (was Re: Full of surprises - A reiser4 story from userland) Date: Wed, 28 Sep 2005 23:31:40 +0300 Message-ID: <5d8b7b90509281331ffd953c@mail.gmail.com> References: <1127914812.12894.96.camel@laptop> <200509281825.49873.vitaly@namesys.com> <1127921286.12894.106.camel@laptop> <433ABD7B.1010903@slaphack.com> <1127932340.12894.149.camel@laptop> <5d8b7b90509281213c95e30c@mail.gmail.com> <200509281952.j8SJq9Uo007371@turing-police.cc.vt.edu> Reply-To: Islam Amer Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <200509281952.j8SJq9Uo007371@turing-police.cc.vt.edu> Content-Disposition: inline List-Id: Content-Type: text/plain; charset="us-ascii" To: "Valdis.Kletnieks@vt.edu" Cc: Fionn Behrens , reiserfs-list@namesys.com > The performance boost for any of the provided iosched schemes can be > positive, negative, imaginary, or complex(*), depending on the actual wor= kload of > the system, and what reference patterns it generates. > I assumed published benchmarks are conducted under strictly controlled conditions. > (*) I suspect that (benchmarks being benchmarks) the chance that the boos= t > be totally real, with no imaginary component, is very slim. And everybod= y > knows that most benchmark results are complex to interpret.. :) Then this scheduler is doing a very good job at creating an illusion of enhanced performance. Thanks for the reply :)