Messages in this thread |  | | Date | Wed, 11 Sep 2002 15:56:54 -0700 | From | george anzinger <> | Subject | Re: [PATCH] USER_HZ & NTP problems |
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Horst von Brand wrote: > > Rolf Fokkens <fokkensr@fokkensr.vertis.nl> said: > > On Tuesday 10 September 2002 08:09, Vojtech Pavlik wrote: > > > Actually, the clock true frequency is 1193181.8 Hz, although most > > > manuals say 1.19318 MHz, which, because truncating more digits, also > > > correct. But 1193180 Hz isn't. If you're trying to count the time > > > correctly, you should better use 1193182 Hz if staying in integers. > > > > I copied the clock frequency from the kernel source, timex.h defines: > > > > #define CLOCK_TICK_RATE 1193180 > > > > If what you're saying is correct, timex.h uses the wrong value as wel I guess. > > I'd be _really_ surprised if that number is within 1% (+-11932 or so) > correct, an error in the last digit (0.0001%) is surely lost. > -- But it DOES explain why the ACPI pm timer at 3579545 is not exactly 3 * CLOCK_TICK_RATE. Inquiring minds want to know :) -- George Anzinger george@mvista.com High-res-timers: http://sourceforge.net/projects/high-res-timers/ Preemption patch: http://www.kernel.org/pub/linux/kernel/people/rml - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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