From owner-cvs-all Wed Sep 4 22: 2:27 2002 Delivered-To: cvs-all@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 59B0D37B400; Wed, 4 Sep 2002 22:02:23 -0700 (PDT) Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.86.163]) by mx1.FreeBSD.org (Postfix) with ESMTP id 76CB443E65; Wed, 4 Sep 2002 22:02:22 -0700 (PDT) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.12.3/8.12.2) with ESMTP id g85527vV013905; Thu, 5 Sep 2002 07:02:13 +0200 (CEST) (envelope-from phk@critter.freebsd.dk) To: "M. Warner Losh" Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/i386/i386 elan-mmcr.c In-Reply-To: Your message of "Wed, 04 Sep 2002 18:43:49 MDT." <20020904.184349.68159448.imp@bsdimp.com> Date: Thu, 05 Sep 2002 07:02:07 +0200 Message-ID: <13904.1031202127@critter.freebsd.dk> From: Poul-Henning Kamp Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In message <20020904.184349.68159448.imp@bsdimp.com>, "M. Warner Losh" writes: >In message: <200209041952.g84JqHZG022386@freefall.freebsd.org> > Poul-Henning Kamp writes: >: The downside is that HZ=100 is not enough, 150 or more recommended, >: I use 250 myself. > >Why is that the case? It seems kinda counter intuitive to me... The counter is 16 bits running at (33.333 MHz / 4) so it rolls over (3333333 / 4) / 65536 = 127 times a second. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message