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RE: [Xen-ia64-devel] Some things to be considered for ptc.ga emulation
| To: | "Tristan Gingold" <Tristan.Gingold@xxxxxxxx>, "Tian, Kevin" <kevin.tian@xxxxxxxxx>, <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-ia64-devel] Some things to be considered for ptc.ga emulation |
| From: | "Xu, Anthony" <anthony.xu@xxxxxxxxx> |
| Date: | Fri, 7 Apr 2006 16:40:48 +0800 |
| Delivery-date: | Fri, 07 Apr 2006 01:41:18 -0700 |
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| Thread-index: | AcZaHawXTk0kId2iTU2yIy9ImSAD7wAAJeTA |
| Thread-topic: | [Xen-ia64-devel] Some things to be considered for ptc.ga emulation |
>From: Tristan Gingold >To: Xu, Anthony; Tian, Kevin; xen-ia64-devel@xxxxxxxxxxxxxxxxxxx >The race is we don't invalidate while we had to. This means a ptc.ga is >concurrent to an itc. >For me there is no race: the itc wins. Of course, it may loose to do the cpu >itc, but it doesn't matter. > Further think, yes, there is no race, some time itc win, some time ptc.ga win, If ptc.ga wins, it will impact performance ( extra tlb miss). One more comment, There maybe two vcpus running on same LP, in this situation, VHPT for this LP is purged twice. Thanks, Anthony >Tristan. _______________________________________________ Xen-ia64-devel mailing list Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-ia64-devel |
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