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RE: [Xen-ia64-devel] [PATCH] Enable hash vtlb


  • To: "Magenheimer, Dan \(HP Labs Fort Collins\)" <dan.magenheimer@xxxxxx>, <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Xu, Anthony" <anthony.xu@xxxxxxxxx>
  • Date: Sat, 8 Apr 2006 01:41:59 +0800
  • Delivery-date: Fri, 07 Apr 2006 10:42:31 -0700
  • List-id: Discussion of the ia64 port of Xen <xen-ia64-devel.lists.xensource.com>
  • Thread-index: AcZaOCQZxD2/LTjiSWCJJGOwhZ+0cwAKHVcgAAJxvvA=
  • Thread-topic: [Xen-ia64-devel] [PATCH] Enable hash vtlb

>individually.  For example, if your TLB mapping fix solves
>the "gcc segmentation fault" issue, even if there is a
>performance hit, the fix should be accepted.

I got domU performance data now,
Kernel build time is about 1997s on native UP machine
Kernel build time is about 1990s on domU without this patch.
Kernel build time is about 1965s on domU with this patch.

In short, though this patch loses 2% performance on dom0,
it gains >1% performance on domU. 
As we know the performance of domU is more importance than that of dom0.
Seems this patch can be checked in.:-)

Thanks,
Anthony

>Dan

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