[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] Guest TSC and Xen (Intel and AMD feedback please)
>From: Dan Magenheimer [mailto:dan.magenheimer@xxxxxxxxxx] >Sent: 2008年7月5日 1:32 > >> >Is this something that you (or Intel in general) could look at? >> >I would be happy to participate but I don't think I understand >> >VT well enough. Once the trap occurs, I suppose Xen system time >> >could be used as the virtual TSC, possibly scaled up. >> > >> >> There should be tiny related to VT, as only turning on some bit to >> allow RDTSC trapping and then the rest stuff should be common >> how to handle it. We'll take a look, but can't commit the time due >> to other scheduled bandwidth. But if you'd like to jump in early >> we definitely can help with VT side. > >If you can post a patch with code that: > >1) declares a boolean global variable: softtsc = 0 >2) if the variable is set, a rdtsc instruction in any hvm > domain causes a trap >3) the trap handler just does a physical rdtsc and returns > >then I could probably take it from there. OK, and Li in CC will take a look and bake a patch for you. Thanks, Kevin _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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