From owner-freebsd-hackers@FreeBSD.ORG Mon Mar 6 16:55:56 2006 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id AB14C16A422 for ; Mon, 6 Mar 2006 16:55:56 +0000 (GMT) (envelope-from asmrookie@gmail.com) Received: from zproxy.gmail.com (zproxy.gmail.com [64.233.162.204]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7D66743D64 for ; Mon, 6 Mar 2006 16:55:53 +0000 (GMT) (envelope-from asmrookie@gmail.com) Received: by zproxy.gmail.com with SMTP id r28so1288134nza for ; Mon, 06 Mar 2006 08:55:52 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=NXHNI458+rfZ6pKuNDks8zubq7Chqli/0K0yNQJuj48HZ76vzYJ+rM7VqJ3I69II9G5NuNTQ0KGOzzpRvrxo5fKtluxv/Y5LxcAuJ87oAXNkV42RseHRIWWla7U9ljlYZKhwtrser4GO9SWzmm2TdgzNakYHnqo47Hdx2qVIvrg= Received: by 10.36.97.6 with SMTP id u6mr7288256nzb; Mon, 06 Mar 2006 08:55:52 -0800 (PST) Received: by 10.36.41.11 with HTTP; Mon, 6 Mar 2006 08:55:52 -0800 (PST) Message-ID: <3bbf2fe10603060855j1c261056mcf8c458e2d3b315f@mail.gmail.com> Date: Mon, 6 Mar 2006 08:55:52 -0800 From: "Attilio Rao" To: "Divacky Roman" In-Reply-To: <20060306145211.GA44977@stud.fit.vutbr.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <3bbf2fe10603060220k3c055092t@mail.gmail.com> <20060306145211.GA44977@stud.fit.vutbr.cz> Cc: freebsd-hackers@freebsd.org Subject: Re: Adding optimized kernel copying support to FreeBSD-i386 - Part II X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: rookie@gufi.org List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Mar 2006 16:55:56 -0000 2006/3/6, Divacky Roman : > On Mon, Mar 06, 2006 at 11:20:10AM +0100, Attilio Rao wrote: > > Hi, > > I did not received too much feedbacks about Part I stability, but I wen= t > on, > > so Part II is available for tests. > > > > It presents an mmx copy which doesn't give much performance increases b= ut > > what I need now is testing for correctness. In particular I would see > > feedbacks about races inside dropping/undropping FPU mechanism. It woul= d > be > > better testing with PREEMPTION + FULL_PREEMPTION enabled (and maybe on = SMP > > archs). > > > > Some minor styling issues have been fixed of the previous patch. > > > > http://users.gufi.org/~rookie/works/patches/mmxcopy.tar.gz > > > > This mmx copy is not intended to be in final release, this is just a > testing > > issue in order to involve CPU < P4 & friends. > > > > For anything else, mail to me. > > hi, > > thnx for the great work. I think you should publish some benchmarks > (ministate-ed buildworld before and after or something like that) and als= o > tell > people what is suitable for their processor. this way people are not > interested > in testing ;( > > anyway - thnx again for your work Actually what I'm interested in is stability. I had a 2% measurable clock wall improvement just for fpu overhaul (bandwidth increased 146 MB/s to 149 MB/s on my P3, 450 MHz). The main effort will be on P4,Xeon and on amd64 porting for Athlon (I'm speaking about performancy matters). But now I need some very intensive testings about "base-code". Attilio -- Peace can only be achieved by understanding - A. Einstein