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[Xen-devel] Re: [PATCH] trust new architecturally-defined TSC Invariant
| To: | Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "Xen-Devel (E-mail)" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: [PATCH] trust new architecturally-defined TSC Invariant bit on Intel systems |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 09 Oct 2009 18:55:05 +0100 |
| Cc: | |
| Delivery-date: | Fri, 09 Oct 2009 10:55:33 -0700 |
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| Thread-topic: | [PATCH] trust new architecturally-defined TSC Invariant bit on Intel systems |
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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 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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