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RE: [Xen-devel] [PATCH][HVM][SVM] Reintroduce ASIDs.

  • To: "Biemueller, Sebastian" <Sebastian.Biemueller@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Ian Pratt" <Ian.Pratt@xxxxxxxxxxxx>
  • Date: Tue, 15 May 2007 12:17:04 +0100
  • Delivery-date: Tue, 15 May 2007 04:16:15 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AceW195aW8skL4OXRuq5UwVa+odMXQACj9lA
  • Thread-topic: [Xen-devel] [PATCH][HVM][SVM] Reintroduce ASIDs.

> This patch reintroduces ASID management for AMD-V.  This work was
> presented on the last XenSummit [1].

Thanks for submitting this. 

It would be good if you could post a benchmark or two (e.g. a kernel
compile and a few lmbench numbers) as I'd like to know what gain we're
getting -- especially as the previous version ended up doing some long
list traversals that hurt performance on systems where use of ASID was
prevented by errata.


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