[Xen-devel] Re: [PATCH] trust new architecturally-defined TSC Invariant bit on Intel systems

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 09/10/2009 18:47, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> If TSC is reliable, is it still necessary to rendezvous?
> I thought the rendezvous was only needed if the slopes
> differ (but not sure I've thought it all the way through).
> No sense stealing all those pcpu cycles to rendezvous if
> it's not necessary, especially on a large system.
> (Maybe TSC reliability IS useful for Xen, not just for
> exposing to userland :-)

Possibly not, but I was only reworking your original patch which didn't
avoid rendezvous either.

 -- Keir



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