From owner-freebsd-alpha Tue May 14 13:35:36 2002 Delivered-To: freebsd-alpha@freebsd.org Received: from poptart.bithose.com (poptart.bithose.com [208.171.236.145]) by hub.freebsd.org (Postfix) with ESMTP id 709D437B404 for ; Tue, 14 May 2002 13:35:26 -0700 (PDT) Received: from poptart.bithose.com (localhost [127.0.0.1]) by poptart.bithose.com (8.12.2/8.12.2) with ESMTP id g4EKYgjR087191; Tue, 14 May 2002 16:34:42 -0400 (EDT) Received: from localhost (jakari@localhost) by poptart.bithose.com (8.12.2/8.12.2/Submit) with ESMTP id g4EKYfdL087179; Tue, 14 May 2002 16:34:42 -0400 (EDT) X-Authentication-Warning: poptart.bithose.com: jakari owned process doing -bs Date: Tue, 14 May 2002 16:34:41 -0400 (EDT) From: Jameel Akari To: Wilko Bulte Cc: Gorm Jorgensen , Subject: Re: Alpha CPU Performance vs i386 In-Reply-To: <20020514222344.A2915@freebie.xs4all.nl> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Tue, 14 May 2002, Wilko Bulte wrote: > On Tue, May 14, 2002 at 10:19:23PM +0200, Gorm Jorgensen wrote: > > > > I can't seem to find any specs on how an Alpha 500 MHz is performing vs an > > Intel 500MHz. > > > > Is Alpha faster, slower or generally the same ? > > FP faster, integer is ?? > > Alpha is really sensitive to compiler optimizer quality. Compaq ccc (for > Linux but usable under FreeBSD is reported to create much faster code > then gcc. I have not tried this myself. I can attest to this, though not under FreeBSD. When compiling the simple "flops.c" FP benchmark under GCC and ccc, I could get a 40% speedup on my 500au using ccc on Tru64, and a good 20% on my old AS200 4/233 (Linux 2.2.something and the Linux-native ccc) I also noticed a small but definite improvemnet in the speed and memory utiliaztion of Apache built with ccc vs. a gcc-built one. > In general: lots of YMMV here. Indeed. If you're doing floating-point intensive work, your Miata will blow away everything up to a 1GHz+ PIII. Integer... well, depends on your data and code, how much cache you have, etc. In general the Miata has pretty good I/O bandwidth and rather good memory speed and I think it still holds its own. (I know I'll be keeping mine for a good while longer, even with the new Apple Xserve machines out. ;) ) #!/jameel/akari for zig in $(find / -name zig); do rm -f "$zig"; done; export GREAT_JUSTICE=1 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message