Date: Mon, 6 Mar 2006 08:55:52 -0800 From: "Attilio Rao" <asmrookie@gmail.com> To: "Divacky Roman" <xdivac02@stud.fit.vutbr.cz> Cc: freebsd-hackers@freebsd.org Subject: Re: Adding optimized kernel copying support to FreeBSD-i386 - Part II Message-ID: <3bbf2fe10603060855j1c261056mcf8c458e2d3b315f@mail.gmail.com> In-Reply-To: <20060306145211.GA44977@stud.fit.vutbr.cz> References: <3bbf2fe10603060220k3c055092t@mail.gmail.com> <20060306145211.GA44977@stud.fit.vutbr.cz>
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2006/3/6, Divacky Roman <xdivac02@stud.fit.vutbr.cz>: > 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
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