[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] [PATCH] Deferrable Timer
Dave, Glad to see there is deferrable timer application. Please go ahead with that. And I will keep you updated if there is finding in my side. BTW, Could you please elaborate more on the "guest-handles-missed-tick" case? Since there is no need to inject missed tick to guest, which timer would be used as deferrable timer? Best Regards Ke Dave Winchell wrote: > Ke, > > One would think that hpet or vpt support for the > guest-handles-missed-ticks policy would be a good application for a > deferrable timer. > If a deferrable timer were used, then the comparator (cmp) would have > to > be warped to a non-integer multiple of the period. This is because > Linux reads the comparator register to estimate the delay since the > interrupt > was posted. > I don't think warping like this will be a problem. At some point, I > can test this. > > I think we could use the deferrable timer for the > guest-does-not-handle-missed-ticks > policy as well. > > Any investigation that you want to do in the platform timer area would > be fine. > Or I can do it, but that will probably be after I do the vpt.c/hpet.c > integration > work. > > thanks, > Dave > >> Best Regards >> Ke >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@xxxxxxxxxxxxxxxxxxx >> http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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