From owner-freebsd-hackers Sun Aug 16 23:03:35 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA23049 for freebsd-hackers-outgoing; Sun, 16 Aug 1998 23:03:35 -0700 (PDT) (envelope-from owner-freebsd-hackers@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 XAA23039 for ; Sun, 16 Aug 1998 23:03:29 -0700 (PDT) (envelope-from tlambert@usr09.primenet.com) Received: (from daemon@localhost) by smtp02.primenet.com (8.8.8/8.8.8) id XAA00487; Sun, 16 Aug 1998 23:02:55 -0700 (MST) Received: from usr09.primenet.com(206.165.6.209) via SMTP by smtp02.primenet.com, id smtpd000465; Sun Aug 16 23:02:52 1998 Received: (from tlambert@localhost) by usr09.primenet.com (8.8.5/8.8.5) id XAA20899; Sun, 16 Aug 1998 23:02:43 -0700 (MST) From: Terry Lambert Message-Id: <199808170602.XAA20899@usr09.primenet.com> Subject: Re: 64-bit time_t To: joerg@krdl.org.sg (Joerg Micheel) Date: Mon, 17 Aug 1998 06:02:42 +0000 (GMT) Cc: ac199@hwcn.org, grog@lemis.com, mph@pobox.com, brawley@camtech.com.au, hackers@FreeBSD.ORG In-Reply-To: <19980817104245.20871@krdl.org.sg> from "Joerg Micheel" at Aug 17, 98 10:42:45 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-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > What bothers much more is resolution. Many things of interest now happen > in fractions of milliseconds. Look at the clock frequency of computers > or the clock of networks (SONET, etc). Nanosecond granularity is a must, > if you'd like to accurately describe an interval it takes to compute or > transmit a certain piece of information. Please note that granularity > does not mean accuracy (it has never been). Right. For example, all resoloution better than a second is arrived at through interpolation, and has been for a long time. SunOS 4 interpolated to a resoloution of 4uS (based on the time it took to make a system call vs. the speed of the hardware at the time). 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-hackers" in the body of the message