From owner-freebsd-current Sun Jan 2 14:42:32 2000 Delivered-To: freebsd-current@freebsd.org Received: from rover.village.org (rover.village.org [204.144.255.49]) by hub.freebsd.org (Postfix) with ESMTP id 87F1F15142 for ; Sun, 2 Jan 2000 14:42:27 -0800 (PST) (envelope-from imp@harmony.village.org) Received: from harmony.village.org (harmony.village.org [10.0.0.6]) by rover.village.org (8.9.3/8.9.3) with ESMTP id PAA60119; Sun, 2 Jan 2000 15:42:24 -0700 (MST) (envelope-from imp@harmony.village.org) Received: from harmony.village.org (localhost.village.org [127.0.0.1]) by harmony.village.org (8.9.3/8.8.3) with ESMTP id PAA31877; Sun, 2 Jan 2000 15:42:24 -0700 (MST) Message-Id: <200001022242.PAA31877@harmony.village.org> To: Karl Denninger Subject: Re: xntpd - VERY old folks, how about updating? :-) Cc: current@FreeBSD.ORG In-reply-to: Your message of "Sun, 02 Jan 2000 16:38:02 CST." <20000102163802.A25936@Denninger.Net> References: <20000102163802.A25936@Denninger.Net> <20000102161029.A25883@Denninger.Net> <20000102103732.A23004@Denninger.Net> <20000102094459.B22738@Denninger.Net> <8426.946828544@critter.freebsd.dk> <20000102103732.A23004@Denninger.Net> <200001022133.OAA31402@harmony.village.org> <20000102161029.A25883@Denninger.Net> <200001022232.PAA31807@harmony.village.org> Date: Sun, 02 Jan 2000 15:42:24 -0700 From: Warner Losh Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message <20000102163802.A25936@Denninger.Net> Karl Denninger writes: : And on what hardware do you think you can obtain 10ns resolution RELIABLY : at the software level in the Unix environment and under FreeBSD? : : Answer: NONE! WRONG. : The actual usable resolution of a timing source is determined by the : maximum slop in ANY part of the complete system. : : I challenge you to get actual REPEATABLE 10ns results while a multi-tasking : anything is running on the recipient of that data. We have hardware timers that let us get into the pico second range on a regular basis. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message