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

["Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>]

> >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.:-)

Could be, but your numbers raise questions about your
measurement methodology.  Why
is domU faster than native (with or without the patch)?
And why is domU much faster than the previous numbers
you posted for dom0 (with or without the patch)?
I've never seen either of these to be true.

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