From owner-freebsd-smp Mon Jun 21 17:44: 4 1999 Delivered-To: freebsd-smp@freebsd.org Received: from smtp04.primenet.com (smtp04.primenet.com [206.165.6.134]) by hub.freebsd.org (Postfix) with ESMTP id 464A614BCF; Mon, 21 Jun 1999 17:43:59 -0700 (PDT) (envelope-from tlambert@usr01.primenet.com) Received: (from daemon@localhost) by smtp04.primenet.com (8.8.8/8.8.8) id RAA12499; Mon, 21 Jun 1999 17:43:57 -0700 (MST) Received: from usr01.primenet.com(206.165.6.201) via SMTP by smtp04.primenet.com, id smtpd012433; Mon Jun 21 17:43:51 1999 Received: (from tlambert@localhost) by usr01.primenet.com (8.8.5/8.8.5) id RAA18994; Mon, 21 Jun 1999 17:43:50 -0700 (MST) From: Terry Lambert Message-Id: <199906220043.RAA18994@usr01.primenet.com> Subject: Re: SMP, 4GB RAM, 4x CPU To: gpalmer@FreeBSD.ORG (Gary Palmer) Date: Tue, 22 Jun 1999 00:43:50 +0000 (GMT) Cc: tich@ma.ikos.com, freebsd-smp@FreeBSD.ORG In-Reply-To: <95539.930005287@noop.colo.erols.net> from "Gary Palmer" at Jun 21, 99 06:48:07 pm X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > > Also there are rumours that Alpha performance is critically dependent > > on the compiler used - i.e. the DEC compiler on Tru64 Unix (is that this > > week's name ?) might give you 30% more performance than gcc. > > I believe GCC sucks for most RISC architectures. I could be wrong, but > getting optimizing compilers for RISC is a complicated game, and I'd > be real surprised if GCC managed it. DEC (used to; haven't checked lately) have instruction scheduling code up for download on gatekeeper.dec.com. From memory, running it as an assembler preprocessor was pretty trivial. Of course, DEC may have advanced the technology without posting new code, so YMMV... Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message