[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Re: HPET/PIT timer accuracy
On 29 Jul 2005, at 18:53, Ian Pratt wrote: Any ideas what could be going on?! This is something of a pain for the new time code, which syncs the local TSCs to the chipset timer....These systems haven't got a 'spread spectrum'[*] PCI bus clock per chance? It might be worth seeing if there's a BIOS option for it. I did check one of our machines, and spread spectrum was definitely disabled. In any case, I'd expect that to jitter the clock at some high frequency, but not add/remove ticks in a way that would be discernable at 1Hz. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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