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Linus Torvalds wrote: > > Of course, the 2048 PIT ticks is just a random choice. It could be any > multiple of 256 ticks, so that error can be made smaller. Maybe it's worth > spending 10ms on this, and get it down by a factor of five (at which point > the error on the PIT frequency is probably in the same order of > magnitude). > FWIW, typical error on the 14.31818 MHz clock (used as the PIT, PMTMR and HPET timebase in most systems) is usually ±50 ppm. High-quality motherboards which use a TCXO for the 14.31818 MHz clock would have around ±1 ppm. -hpa -- 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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