From owner-freebsd-hackers Fri Apr 27 8:32:58 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from peorth.iteration.net (peorth.iteration.net [208.190.180.178]) by hub.freebsd.org (Postfix) with ESMTP id 8ABE937B422 for ; Fri, 27 Apr 2001 08:32:54 -0700 (PDT) (envelope-from keichii@peorth.iteration.net) Received: by peorth.iteration.net (Postfix, from userid 1001) id BCC7E594B5; Fri, 27 Apr 2001 10:32:52 -0500 (CDT) Date: Fri, 27 Apr 2001 10:32:52 -0500 From: "Michael C . Wu" To: Sergey Babkin Cc: Jeremiah Gowdy , freebsd-hackers@FreeBSD.ORG Subject: Re: x86-64 Hammer and IA64 Itainium Message-ID: <20010427103252.F88522@peorth.iteration.net> Reply-To: "Michael C . Wu" Mail-Followup-To: "Michael C . Wu" , Sergey Babkin , Jeremiah Gowdy , freebsd-hackers@FreeBSD.ORG References: <200104171836.LAA06378@akira.lanfear.com> <000001c0c777$f9529b30$215778d8@cx443070b> <20010426175906.B88522@peorth.iteration.net> <3AE8D4DC.E0E35042@bellatlantic.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <3AE8D4DC.E0E35042@bellatlantic.net>; from babkin@bellatlantic.net on Thu, Apr 26, 2001 at 10:09:32PM -0400 X-PGP-Fingerprint: 5025 F691 F943 8128 48A8 5025 77CE 29C5 8FA1 2E20 X-PGP-Key-ID: 0x8FA12E20 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thu, Apr 26, 2001 at 10:09:32PM -0400, Sergey Babkin scribbled: | "Michael C . Wu" wrote: | > | > With the branch prediction, cache tracing, and EPIC instructions, | > you really want to use an ILP compiler. Without a compiler that | > can decide on good ways to output binaries that run with all the IA-64 | > innovations^Wreinvention-of-the-wheels. Correcting my unclear and grammatrical incorrect sentence: "Without a compiler that can decide on better ways to output binaries using all of the features of IA-64 CPU's, you really miss the point of using IA-64." | Anothing interesting point is that the optimisation for IA-64 | seems to be highly processor-specific: the code optimized for | Itanium won't be optimal for McKinley and vice versa. I've heard | an estimation of about 1.5 times speed increase due to the | model-specific optimisation. You are asking a *lot* from the computer architects. :) If we can solve the issue of compatibility without inhibiting performance, we'd be REALLY rich now..... -- +-----------------------------------------------------------+ | keichii@iteration.net | keichii@freebsd.org | | http://iteration.net/~keichii | Yes, BSD is a conspiracy. | +-----------------------------------------------------------+ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message