Ryota OZAKI wrote: > Hi all, > > Current kvm allows only one VM to use HPET. Is > there a plan to implement a functionality to > allow multiple VMs to use HPET? If so, how > about the status of that? > >
If you use the dyntick clock option (the default, IIRC), and a newer host kernel, then the kernel provides high-resolution timers, very likely using HPET internally or some other high resolution clock and event source. > And I would like to ask right and wrong to > implement the functionality in terms of need > and efficiency (scalability and time accuracy). I think that for newer kernels we already have the desired accuracy. We're not always good at exploiting that accuracy; hence the recent movement of the PIT implementation from userspace to the kernel. But recent discussion leads me to believe it could have been implemented with the userspace PIT as well. -- Any sufficiently difficult bug is indistinguishable from a feature. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
