From owner-freebsd-current Sat Sep 5 00:09:10 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id AAA22754 for freebsd-current-outgoing; Sat, 5 Sep 1998 00:09:10 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from smtp02.primenet.com (smtp02.primenet.com [206.165.6.132]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id AAA22747 for ; Sat, 5 Sep 1998 00:09:08 -0700 (PDT) (envelope-from tlambert@usr08.primenet.com) Received: (from daemon@localhost) by smtp02.primenet.com (8.8.8/8.8.8) id AAA15425; Sat, 5 Sep 1998 00:07:57 -0700 (MST) Received: from usr08.primenet.com(206.165.6.208) via SMTP by smtp02.primenet.com, id smtpd015405; Sat Sep 5 00:07:53 1998 Received: (from tlambert@localhost) by usr08.primenet.com (8.8.5/8.8.5) id AAA29484; Sat, 5 Sep 1998 00:07:48 -0700 (MST) From: Terry Lambert Message-Id: <199809050707.AAA29484@usr08.primenet.com> Subject: Re: bzero bandwidth computation To: mike@smith.net.au (Mike Smith) Date: Sat, 5 Sep 1998 07:07:47 +0000 (GMT) Cc: phk@critter.freebsd.dk, bde@zeta.org.au, caj@lfn.org, freebsd-current@FreeBSD.ORG In-Reply-To: <199809040844.IAA03514@word.smith.net.au> from "Mike Smith" at Sep 4, 98 08:44:16 am X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > The current set of symptoms *seem* to be related to cycle-counter > related interpolation being off because either the tick rate is erratic > or the CPU speed is non-constant. It's looking like we can't rely on > the cycle counter for accurate timing - this will be an issue with > desktops as PC98 and PC99 systems start to become common too. 8( What does the cycle counter do in a HLT'ed CPU? Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message