From owner-freebsd-current Sat Sep 14 5:58:47 2002 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 919EA37B400 for ; Sat, 14 Sep 2002 05:58:44 -0700 (PDT) Received: from volatile.chemikals.org (cae57-176-076.sc.rr.com [66.57.176.76]) by mx1.FreeBSD.org (Postfix) with ESMTP id C486B43E75 for ; Sat, 14 Sep 2002 05:58:43 -0700 (PDT) (envelope-from morganw@chemikals.org) Received: from volatile.chemikals.org (morganw@localhost [127.0.0.1]) by volatile.chemikals.org (8.12.5/8.12.5) with ESMTP id g8ECw7QU069553; Sat, 14 Sep 2002 08:58:08 -0400 (EDT) (envelope-from morganw@chemikals.org) Received: from localhost (morganw@localhost) by volatile.chemikals.org (8.12.5/8.12.5/Submit) with ESMTP id g8ECw76e069550; Sat, 14 Sep 2002 08:58:07 -0400 (EDT) X-Authentication-Warning: volatile.chemikals.org: morganw owned process doing -bs Date: Sat, 14 Sep 2002 08:58:07 -0400 (EDT) From: Wesley Morgan To: Julian Elischer Cc: Poul-Henning Kamp , Terry Lambert , Mark Murray , FreeBSD current users Subject: Re: A riddle in -current In-Reply-To: Message-ID: <20020914085750.V69474-100000@volatile.chemikals.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII 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 99% of the time my laptop is probed with "ACPI-fast", but once or twice it has come back with ACPI-safe. So not only is it possible to differ on "like" hardware, but on the same machine. You might not want to pull your hair out over that one. On Sat, 14 Sep 2002, Julian Elischer wrote: > > > On Sat, 14 Sep 2002, Poul-Henning Kamp wrote: > > > In message , Ju > > lian Elischer writes: > > > > >the only difference I've found so far is teh following differnce in the > > >dmesg output: > > >21,22c21 > > >< Timecounter "ACPI-safe" frequency 3579545 Hz > > >< unknown: I/O range not supported > > >--- > > >> Timecounter "ACPI-fast" frequency 3579545 Hz > > > > You can test the difference this makes by timing > > for (i = 0; i < 1000000; i++) > > gettimeofday(&tv, NULL) > > > > ACPI-safe means that the hardware doesn't act like a properly implemented > > binary counter (!) whereas ACPI-fast has not given any signs of having > > trouble during the boot-time probing. > > > that's interesting... > why would they differ.... thy are the same hardware > (serial numbers 1 apart ....) I'll have to investigate closer.. > > > > > -- > > 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 > -- _ __ ___ ____ ___ ___ ___ Wesley N Morgan _ __ ___ | _ ) __| \ morganw@chemikals.org _ __ | _ \._ \ |) | FreeBSD: The Power To Serve _ |___/___/___/ Hi! I'm a .signature virus! Copy me into your ~/.signature to help me spread! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message