From owner-freebsd-alpha Fri Mar 3 15: 4: 3 2000 Delivered-To: freebsd-alpha@freebsd.org Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by hub.freebsd.org (Postfix) with ESMTP id 2483F37C084 for ; Fri, 3 Mar 2000 15:04:00 -0800 (PST) (envelope-from gallatin@cs.duke.edu) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.9.3/8.9.3) with ESMTP id SAA29236; Fri, 3 Mar 2000 18:03:58 -0500 (EST) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.9.3/8.9.1) id SAA70834; Fri, 3 Mar 2000 18:03:27 -0500 (EST) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Date: Fri, 3 Mar 2000 18:03:27 -0500 (EST) To: Wilko Bulte Cc: "Waite, Michael" , freebsd-alpha@FreeBSD.ORG Subject: Re: Alpha ISO is fantastic! In-Reply-To: <20000303232726.A5993@yedi.iaf.nl> References: <212CC57E84B8D111AD780000F84AA049083C2C11@mroexc2.tay.dec.com> <20000303232726.A5993@yedi.iaf.nl> X-Mailer: VM 6.43 under 20.4 "Emerald" XEmacs Lucid Message-ID: <14528.17265.955978.964252@grasshopper.cs.duke.edu> Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Wilko Bulte writes: > I'd be very interested to see how the XP1000 behaves running X as I see > problems on all my Alphas (Miata GL , Miata MX5 and EB64+/Aspen Alpine) > when running X. I suspect that it will do much better because a tsunami chipset behaves a lot like an x86 on bad accesses -- reads to bad addresses in device memory return -1 and writes are ignored. All other platforms give you a machine check. This confused the heck out of me when I was doing the tsunami support. On a related note -- Wilko, can you try compiling X with either -O or -O0? I just tracked down a nasty bug troubling somebody else which was caused by gcc generating bad code. I have a sneaking suspicion that the compiler might be behind at least some of your pain. Cheers, Drew ------------------------------------------------------------------------------ Andrew Gallatin, Sr Systems Programmer http://www.cs.duke.edu/~gallatin Duke University Email: gallatin@cs.duke.edu Department of Computer Science Phone: (919) 660-6590 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message