[Xen-ia64-devel] [PATCH] XEN: accelerate guest tr search.

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

Guest has 8 I/D TR entries, when tlb miss happens, VMM will check these
8 TR entries to see whether corresponding tlb entry can be found. In
fact, guest 
may not use all of these 8 entry, for example, linux only uses first 2
ITR and 
first 4 DTR(maybe not exact). I add two members in vcpu struct,
itr_maxslot, 
dtr_maxslot to record max entry number of guest ITR and DTR which are
used by 
guest. So when VMM searches guest TRs, it doesn't need to check all TRs,
just 
those used by guest. Since searching guest TR is a frequent operation,
this patch
should improve performance of dom0 and domU in theory. I don't have data
:-).

Signed-off-by: Anthony Xu <anthony.xu@xxxxxxxxx>

Thanks,
-Anthony

Attachment: accelerate_guest_tr_search.patch
Description: accelerate_guest_tr_search.patch

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