Date: Sun, 02 Jan 2000 15:42:24 -0700 From: Warner Losh <imp@village.org> To: Karl Denninger <karl@Denninger.Net> Cc: current@FreeBSD.ORG Subject: Re: xntpd - VERY old folks, how about updating? :-) Message-ID: <200001022242.PAA31877@harmony.village.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>
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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
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