From owner-freebsd-hackers Thu Apr 26 19:11:57 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from smtp02.teb1.iconnet.net (smtp02.teb1.iconnet.net [209.3.218.43]) by hub.freebsd.org (Postfix) with ESMTP id CDC4F37B422 for ; Thu, 26 Apr 2001 19:10:30 -0700 (PDT) (envelope-from babkin@bellatlantic.net) Received: from bellatlantic.net (client-151-198-117-21.nnj.dialup.bellatlantic.net [151.198.117.21]) by smtp02.teb1.iconnet.net (8.9.1/8.9.1) with ESMTP id WAA00570; Thu, 26 Apr 2001 22:09:47 -0400 (EDT) Message-ID: <3AE8D4DC.E0E35042@bellatlantic.net> Date: Thu, 26 Apr 2001 22:09:32 -0400 From: Sergey Babkin X-Mailer: Mozilla 4.7 [en] (X11; U; FreeBSD 4.0-19990626-CURRENT i386) X-Accept-Language: en, ru MIME-Version: 1.0 To: "Michael C . Wu" Cc: Jeremiah Gowdy , freebsd-hackers@FreeBSD.ORG Subject: Re: x86-64 Hammer and IA64 Itainium References: <200104171836.LAA06378@akira.lanfear.com> <000001c0c777$f9529b30$215778d8@cx443070b> <20010426175906.B88522@peorth.iteration.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG "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. 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. -SB To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message