From owner-freebsd-questions@FreeBSD.ORG Sun Sep 2 19:33:08 2007 Return-Path: Delivered-To: freebsd-questions@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 01A8F16A417 for ; Sun, 2 Sep 2007 19:33:08 +0000 (UTC) (envelope-from list@museum.rain.com) Received: from ns.umpquanet.com (ns.umpquanet.com [204.119.0.16]) by mx1.freebsd.org (Postfix) with ESMTP id 00B5013C45E for ; Sun, 2 Sep 2007 19:33:07 +0000 (UTC) (envelope-from list@museum.rain.com) Received: from ns.umpquanet.com (localhost [127.0.0.1]) by ns.umpquanet.com (8.14.1/8.14.1) with ESMTP id l82JX7qo080289; Sun, 2 Sep 2007 12:33:07 -0700 (PDT) (envelope-from list@museum.rain.com) Received: (from james@localhost) by ns.umpquanet.com (8.14.1/8.14.1/Submit) id l82JX6hw080288; Sun, 2 Sep 2007 12:33:06 -0700 (PDT) (envelope-from list@museum.rain.com) Date: Sun, 2 Sep 2007 12:33:06 -0700 From: James Long To: Kris Kennaway Message-ID: <20070902193306.GA79850@ns.umpquanet.com> References: <20070902012446.GA17048@ns.umpquanet.com> <46DA9BED.20804@FreeBSD.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46DA9BED.20804@FreeBSD.org> User-Agent: Mutt/1.5.16 (2007-06-09) Cc: freebsd-questions@FreeBSD.org Subject: Re: Recent update to RELENG_6 creates lots of calcru warnings X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 02 Sep 2007 19:33:08 -0000 On Sun, Sep 02, 2007 at 01:18:05PM +0200, Kris Kennaway wrote: > James Long wrote: >> I'm running FreeBSD RELENG_6 on a Compaq DL380 G2 dual PIII-1.4GHz with an >> SMP kernel. dmesg below. >> Prior to about August 12, the system had been quite stable. >> Since that time, I am finding lots of calcru warnings, which often >> cause system services to fail when they see unorthodox time shifts. >> Section 5.19 of the handbook appears not to be current any longer, >> suggesting setting kern.timecounter.method=1. >> kern.timecounter.hardware=i8254 also does not improve things. >> Other suggestions? >> Thanks, >> Jim >> Sep 1 18:00:30 ns sudo: james : TTY=ttyp0 ; >> PWD=/usr/local/www/sites/com.umpquanet/support ; USER=root ; >> COMMAND=/sbin/sysctl -w kern.timecounter.hardware=i8254 >> Sep 1 18:02:44 ns kernel: calcru: runtime went backwards from 1343309 >> usec to 1178478 usec for pid 3663 (hpasmd) >> Sep 1 18:02:44 ns kernel: calcru: negative runtime of -1274607 usec for >> pid 3660 (hpasmd) ... big snip ... > Does reverting to the older kernel work? If so, can you isolate which > commit caused the problem by doing a binary search of date ranges? This > should be easy to do since the rate of changes to RELENG_6 is low. > > Kris Please pardon the rookie question, but the machine is not blazingly fast to build (circa 90 minute world, 20 min. kernel). For the purposes of the binary search, may I build just the kernel, and would you suggest leaving the up-to-date world and running against a slightly older kernel as I test, or should I roll the world back to early August, and test against a slightly new kernel -- or will it matter?