From owner-freebsd-current@FreeBSD.ORG Thu May 6 17:57:06 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 7ABD416A4CE for ; Thu, 6 May 2004 17:57:06 -0700 (PDT) Received: from cain.gsoft.com.au (cain.gsoft.com.au [203.31.81.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7730743D41 for ; Thu, 6 May 2004 17:57:02 -0700 (PDT) (envelope-from doconnor@gsoft.com.au) Received: from inchoate.gsoft.com.au (localhost [127.0.0.1]) (authenticated bits=0) by cain.gsoft.com.au (8.12.11/8.12.10) with ESMTP id i470uqIm067465; Fri, 7 May 2004 10:26:54 +0930 (CST) (envelope-from doconnor@gsoft.com.au) From: "Daniel O'Connor" To: "P.D. Seniura" Date: Fri, 7 May 2004 10:26:51 +0930 User-Agent: KMail/1.6.2 References: <20040507005518.75B6A79004C@ws1-14.us4.outblaze.com> In-Reply-To: <20040507005518.75B6A79004C@ws1-14.us4.outblaze.com> MIME-Version: 1.0 Content-Disposition: inline Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message-Id: <200405071026.51646.doconnor@gsoft.com.au> X-Spam-Score: -4.9 () CARRIAGE_RETURNS,IN_REP_TO,PGP_SIGNATURE,QUOTED_EMAIL_TEXT,REFERENCES,SPAM_PHRASE_00_01,USER_AGENT,USER_AGENT_KMAIL X-Scanned-By: MIMEDefang 2.16 (www . roaringpenguin . com / mimedefang) cc: freebsd-current@freebsd.org 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 00:57:06 -0000 =2D----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Fri, 7 May 2004 10:25, P.D. Seniura wrote: > > > It seems this bug happens when the HZ value goes below 16 > > > (either by compiling 'options HZ=3D' in kernel or setting > > > sysctl 'kern.hz=3D' 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". ;) =46air enough.. I wouldn't expect you'd notice the difference between 20 and 200 though.. =2D --=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C =2D----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAmt7T5ZPcIHs/zowRAhNfAJ9C6kxIKUOWZs0zhkrrH4hLjSwnBwCeKhwW g5zGLKvxjTNuxUQ6XfStpRA=3D =3Dyk9c =2D----END PGP SIGNATURE-----