From owner-freebsd-current@FreeBSD.ORG Thu May 6 17:14:11 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 C9D8B16A4CE for ; Thu, 6 May 2004 17:14:11 -0700 (PDT) Received: from cain.gsoft.com.au (cain.gsoft.com.au [203.31.81.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id ABAAF43D2F for ; Thu, 6 May 2004 17:14:08 -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 i470E22R066055; Fri, 7 May 2004 09:44:03 +0930 (CST) (envelope-from doconnor@gsoft.com.au) From: "Daniel O'Connor" To: freebsd-current@freebsd.org, Paul Seniura Date: Fri, 7 May 2004 09:43:52 +0930 User-Agent: KMail/1.6.2 References: <20040506171135.1ADEA5CB5@techpc04.okladot.state.ok.us> <20040506213641.1C6C25CD1@techpc04.okladot.state.ok.us> In-Reply-To: <20040506213641.1C6C25CD1@techpc04.okladot.state.ok.us> MIME-Version: 1.0 Content-Disposition: inline Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message-Id: <200405070944.01827.doconnor@gsoft.com.au> X-Spam-Score: -4.1 () CARRIAGE_RETURNS,IN_REP_TO,PGP_SIGNATURE,REFERENCES,SPAM_PHRASE_00_01,USER_AGENT,USER_AGENT_KMAIL X-Scanned-By: MIMEDefang 2.16 (www . roaringpenguin . com / mimedefang) 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 00:14:11 -0000 =2D----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Fri, 7 May 2004 07:06, Paul 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= =20 tried it :) =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) iD8DBQFAmtTI5ZPcIHs/zowRAgz1AJ4v0lCPJ65msKXP1DVBJa4p42/BKACglAK/ K7Aw8vg5AP/3ld+2s1xr4yk=3D =3DS4LX =2D----END PGP SIGNATURE-----