From owner-freebsd-alpha Sun Aug 19 18:20: 3 2001 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 375B337B414; Sun, 19 Aug 2001 18:19:59 -0700 (PDT) (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 VAA19155; Sun, 19 Aug 2001 21:19:57 -0400 (EDT) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.11.3/8.9.1) id f7K1JSN27269; Sun, 19 Aug 2001 21:19:28 -0400 (EDT) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15232.26016.723068.885342@grasshopper.cs.duke.edu> Date: Sun, 19 Aug 2001 21:19:28 -0400 (EDT) To: John Baldwin Cc: alpha@FreeBSD.ORG, "David O'Brien" , imp@FreeBSD.ORG Subject: Re: today's kernel + JHB's trap.c patch is *evil* In-Reply-To: References: X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid 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 John Baldwin writes: > As to why the 4100 hasn't seen this, it may be that the slower CPU's are > preventing this race from happening, or that 21164's use a stricter memory > ordering than 21264's. I've seen similar issues where my dual P3 600 would > have problems when my dual PPro 200 wouldn't. > 21264s are the first alpha to do out of order execution. Perhaps this has something to do with it. FWIW, my UP1000 that I gripe about -current stability problems on is a 21264 also.. Drew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message