From owner-cvs-all Wed Dec 13 5:27:42 2000 From owner-cvs-all@FreeBSD.ORG Wed Dec 13 05:27:38 2000 Return-Path: Delivered-To: cvs-all@freebsd.org Received: from mass.osd.bsdi.com (adsl-63-202-176-64.dsl.snfc21.pacbell.net [63.202.176.64]) by hub.freebsd.org (Postfix) with ESMTP id 56A9037B400; Wed, 13 Dec 2000 05:27:38 -0800 (PST) Received: from mass.osd.bsdi.com (localhost [127.0.0.1]) by mass.osd.bsdi.com (8.11.1/8.11.1) with ESMTP id eBDDbH308681; Wed, 13 Dec 2000 05:37:21 -0800 (PST) (envelope-from msmith@mass.osd.bsdi.com) Message-Id: <200012131337.eBDDbH308681@mass.osd.bsdi.com> X-Mailer: exmh version 2.1.1 10/15/1999 To: Bruce Evans Cc: John Baldwin , cvs-all@FreeBSD.org, cvs-committers@FreeBSD.org Subject: Re: cvs commit: src/sys/kern kern_ktr.c In-reply-to: Your message of "Thu, 14 Dec 2000 00:14:30 +1100." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 13 Dec 2000 05:37:17 -0800 From: Mike Smith Sender: msmith@mass.osd.bsdi.com Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > On Tue, 12 Dec 2000, John Baldwin wrote: > > > On 12-Dec-00 Bruce Evans wrote: > > > Mutex operations actually resulted only on the i386 arch, only if the > > > i8254 timecounter was used (i.e., mainly on pre-PCI pre-Pentium > > > systems)... > > > > It would crash both my dual P3-600 and my P3-700 laptop, so it wasn't limited > > to just pre-PCI. :-/ ... > > The PIIX4 timecounter is used on many PCI systems. I was over-optimistic > in hoping that most post-Pentium PCI systems have one. What chipsets do > your systems have? Both his systems have the ACPI timecounter hardware. We don't use it aggressively enough yet. We also need some tweaks to determine whether we can trust it to be a synchronous counter (the PIIX4 can't be trusted, but others might be). -- ... every activity meets with opposition, everyone who acts has his rivals and unfortunately opponents also. But not because people want to be opponents, rather because the tasks and relationships force people to take different points of view. [Dr. Fritz Todt] V I C T O R Y N O T V E N G E A N C E To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message