On Mon, 2012-03-12 at 12:34 +0200, Avi Kivity wrote: > On 03/12/2012 01:29 PM, Davidlohr Bueso wrote: > > On Mon, 2012-03-12 at 10:22 +0200, Avi Kivity wrote: > > > On 03/11/2012 05:57 PM, Davidlohr Bueso wrote: > > > > From: Davidlohr Bueso <[email protected]> > > > > > > > > Add a new tracepoint for vpid allocation and freeing associated to all > > > > vCPUs. > > > > > > > > > > Why? > > > > > > > We have been using this tracepoint for some time now to help debug vpids > > and simulating tagged TLB behavior and performance. This gets to be non > > trivial when working with large amounts of guests and vCPUs. > > I don't follow. Can you give an example of when this tracepoint would > be useful? >
For example when running lots of guests with many different hardware configurations (ept on/off, vpid on/off) I trace what vcpu has or doesn't have a corresponding vpid associated. Perhaps this is more useful for experimental things than actual KVM development. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
