From owner-freebsd-arch Fri Oct 26 9:42:58 2001 Delivered-To: freebsd-arch@freebsd.org Received: from elvis.mu.org (elvis.mu.org [216.33.66.196]) by hub.freebsd.org (Postfix) with ESMTP id 9C20037B405 for ; Fri, 26 Oct 2001 09:42:49 -0700 (PDT) Received: by elvis.mu.org (Postfix, from userid 1192) id 84E4C81D0A; Fri, 26 Oct 2001 11:42:49 -0500 (CDT) Date: Fri, 26 Oct 2001 11:42:49 -0500 From: Alfred Perlstein To: Poul-Henning Kamp Cc: Julian Elischer , Terry Lambert , Peter Wemm , arch@FreeBSD.ORG Subject: Re: 64 bit times revisited.. Message-ID: <20011026114249.E15052@elvis.mu.org> References: <3463.1004114334@critter.freebsd.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <3463.1004114334@critter.freebsd.dk>; from phk@critter.freebsd.dk on Fri, Oct 26, 2001 at 06:38:54PM +0200 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 * Poul-Henning Kamp [011026 11:39] wrote: > In message , Ju > lian Elischer writes: > > >considering that we didn't have ANY sub-second resolution for a long time > >I think that > >looking for sub microsecond resolution on access times is pointless at > >this time.. > > I am looking for it at this time, not _for_ this time, but _for_ > the future. > > If state of the art equipment can break the make(1) assumption today, > what do you think the life expectancy of the designed concept is ? > > Certainly not 10+ years. > > And have you considered that there may be other and stronger > requirements than make(1) and that multi-cpu, multi-threaded systems > may push the envelope ? > > Solving the problem means going for a timestamp which can resolve > any conceiveable CPU frequencies for all relevant future. I guess I should have more in depth knowledge of these systems by now, but what's wrong with having the in-core being a full 64/128/whatever bits while the on disk itself doesn't? At least until Kirk does his new layout, it might be a compromise to regain out 2037 safety a bit early on. -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' http://www.morons.org/rants/gpl-harmful.php3 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message