From owner-freebsd-current Sun Feb 16 22:19:59 2003 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 B4B0737B401 for ; Sun, 16 Feb 2003 22:19:58 -0800 (PST) Received: from phk.freebsd.dk (phk.freebsd.dk [212.242.86.175]) by mx1.FreeBSD.org (Postfix) with ESMTP id AEE0A43F75 for ; Sun, 16 Feb 2003 22:19:57 -0800 (PST) (envelope-from phk@phk.freebsd.dk) Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.86.163]) by phk.freebsd.dk (8.12.6/8.12.6) with ESMTP id h1H6Jt6E051401; Mon, 17 Feb 2003 06:19:55 GMT (envelope-from phk@phk.freebsd.dk) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.12.6/8.12.6) with ESMTP id h1H6JhOx093197; Mon, 17 Feb 2003 07:19:50 +0100 (CET) (envelope-from phk@phk.freebsd.dk) To: Bruce Evans Cc: Kris Kennaway , current@FreeBSD.ORG Subject: Re: Clock disabled during DDB From: phk@phk.freebsd.dk In-Reply-To: Your message of "Mon, 17 Feb 2003 16:29:06 +1100." <20030217155320.N4682-100000@gamplex.bde.org> Date: Mon, 17 Feb 2003 07:19:43 +0100 Message-ID: <93196.1045462783@critter.freebsd.dk> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In message <20030217155320.N4682-100000@gamplex.bde.org>, Bruce Evans writes: >The >piix timecounter has a lower frequency than the TSC, but for some >reason we mask it to 24 bits (16M cycles @ 3.5+ MHz = 4+ seconds). We do this because the spec defines it as either 32 or 24 bit and some 24 bit implementations claim to have 32 bits. -- 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 freebsd-current" in the body of the message