[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [RFC] Physical hot-add cpus and TSC
On 26/05/2010 17:44, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote: >> True at the moment, but can we not just whack the TSC of the newly >> added CPU on the head when it is brought online, to match the >> boot CPU? > > Possibly... but the code for whacking the TSC of a CPU after > C3-state results in a TSC value that is poorly-aligned with other > running TSCs. If there is a better way for "whacking" that > results in a nearly-perfectly-aligned TSC (that would pass > a "tsc warp test"), that is an option. But what we do in 4.0 is whack all the TSCs at boot time... How is this any different? -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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