Date: Fri, 12 Mar 1999 08:34:09 +0100 (MET) From: Michael Hanke To: pgcc AT delorie DOT com Subject: Re: AMDK6 optimized kernel and others In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Reply-To: pgcc AT delorie DOT com X-Mailing-List: pgcc AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk On Thu, 11 Mar 1999, Dan Melomedman (free video eden) wrote: > without size optimization for K6. Also I noted that gzip compiled for > pentium is slower that gzip compiled for amdk6 on amd machine, this kinda > shows that amdk6 optimization actually works quite nicely. I use Stampede This note gives me the opportunity to ask about the real gain of pgcc on AMD chips. I have an old K5 processor. Since I am mainly interested in scientific computing, I would like to know the possible gain for fpu intense applications (e.g. BLAS). And the best possible flags (IEEE arithmetic is essential!). Recently, I am using gcc 2.7.2 with -m486. Moreover, most programs are written in FORTRAN. Is there a pg77 available or should I resort to f2c? The main exception in my applications are qt/KDE/lyx. Does anybody have experiences in the gain in speed for these programs? Yours, Michael +---------------------------------------------------------------+ | Michael Hanke Royal Institute of Technology | | NADA | | S-10044 Stockholm | | Sweden | +---------------------------------------------------------------+ | Visiting address: Lindstedtsvaegen 3 | | Phone: + (46) (8) 790 6278 | | Fax: + (46) (8) 790 0930 | | Email: hanke AT nada DOT kth DOT se | | na DOT mhanke AT na-net DOT ornl DOT gov | +---------------------------------------------------------------+