From owner-freebsd-current@FreeBSD.ORG Thu May 6 17:55:20 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 98E0316A4CE for ; Thu, 6 May 2004 17:55:20 -0700 (PDT) Received: from webmail-outgoing.us4.outblaze.com (webmail-outgoing.us4.outblaze.com [205.158.62.67]) by mx1.FreeBSD.org (Postfix) with ESMTP id 403B643D58 for ; Thu, 6 May 2004 17:55:20 -0700 (PDT) (envelope-from pdseniura@techie.com) Received: from wfilter.us4.outblaze.com (wfilter.us4.outblaze.com [205.158.62.180])8FD001803A6D for ; Fri, 7 May 2004 00:55:18 +0000 (GMT) X-OB-Received: from unknown (205.158.62.178) by wfilter.us4.outblaze.com; 7 May 2004 00:53:15 -0000 Received: by ws1-14.us4.outblaze.com (Postfix, from userid 1001) id 75B6A79004C; Fri, 7 May 2004 00:55:18 +0000 (GMT) Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline Content-Transfer-Encoding: 7bit MIME-Version: 1.0 X-Mailer: MIME-tools 5.41 (Entity 5.404) Received: from [68.227.96.63] by ws1-14.us4.outblaze.com with http for pdseniura@techie.com; Thu, 06 May 2004 18:55:18 -0600 From: "P.D. Seniura" To: "Daniel O'Connor" , freebsd-current@freebsd.org Date: Thu, 06 May 2004 18:55:18 -0600 X-Originating-Ip: 68.227.96.63 X-Originating-Server: ws1-14.us4.outblaze.com Message-Id: <20040507005518.75B6A79004C@ws1-14.us4.outblaze.com> Subject: Re: low HZ value causes "Time Warp Bug" (re: this Puny Pentium2 suddenly became 45% slower!) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 07 May 2004 00:55:20 -0000 > > It seems this bug happens when the HZ value goes below 16 > > (either by compiling 'options HZ=' in kernel or setting > > sysctl 'kern.hz=' in /boot/loader.conf). The computed > > 'ticks' value becomes too large for 2-byte int producing > > crazy overflowed numbers elsewhere. > > 16 is pretty low.. > Then again it would be nice if it warned you or something similar when you > tried it :) Heh, I got HZ set to 20 while it does buildworld (~9 hours) and portupgrade overnight. The idea is "less slicing and more doing". ;) -- ___________________________________________________________ Sign-up for Ads Free at Mail.com http://promo.mail.com/adsfreejump.htm