From owner-freebsd-arch Mon Oct 29 9:21:44 2001 Delivered-To: freebsd-arch@freebsd.org Received: from ns.yogotech.com (ns.yogotech.com [206.127.123.66]) by hub.freebsd.org (Postfix) with ESMTP id B84D737B40A for ; Mon, 29 Oct 2001 09:21:40 -0800 (PST) Received: from caddis.yogotech.com (caddis.yogotech.com [206.127.123.130]) by ns.yogotech.com (8.9.3/8.9.3) with ESMTP id KAA22254; Mon, 29 Oct 2001 10:21:34 -0700 (MST) (envelope-from nate@yogotech.com) Received: (from nate@localhost) by caddis.yogotech.com (8.11.6/8.11.6) id f9THLYS18191; Mon, 29 Oct 2001 10:21:34 -0700 (MST) (envelope-from nate) From: Nate Williams MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15325.36894.320057.967406@caddis.yogotech.com> Date: Mon, 29 Oct 2001 10:21:34 -0700 To: Poul-Henning Kamp Cc: Julian Elischer , Peter Wemm , arch@FreeBSD.ORG Subject: Re: 64 bit times revisited.. In-Reply-To: <24137.1004080687@critter.freebsd.dk> References: <24137.1004080687@critter.freebsd.dk> X-Mailer: VM 6.95 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid Reply-To: nate@yogotech.com (Nate Williams) Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > >ufs has enough room to fix this.. > >there has been a field defined in the on disk inode for nanosecs > >in each of the time values... > >if we take the lowest 8 bits of that field and re-assign it to be > >the highest 8 bits of the seconds, then we have time accuracy down to > >microseconds still and we expand file times by a factor > >of 256 (which is all of recorded history plus some) > > > >we just always set those bits to 0 for the next 37 years and we don;t > >really lose time resolution and we gain compatibility with the future.. > >nothing these days has nonosecond resolution there anyhow.... Simply not true. We have pico second resolution in our product, which is necessary because we're using *really* fast transports, and need to do very precise timing. (We're not using FreeBSD now, but if we need that kind of resolution in 2001, I can easily see the need for much higher resolution in the future.) I'm with PHK here (can you believe it?). :) :) Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message