Messages in this thread | | | Date | Mon, 03 Mar 2008 20:09:49 +0200 | From | Avi Kivity <> | Subject | Re: [PATCH] mmu notifiers #v8 |
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Jack Steiner wrote: > The range invalidates have a performance advantage for the GRU. TLB invalidates > on the GRU are relatively slow (usec) and interfere somewhat with the performance > of other active GRU instructions. Invalidating a large chunk of addresses with > a single GRU TLBINVAL operation is must faster than issuing a stream of single > page TLBINVALs. > > I expect this performance advantage will also apply to other users of mmuops. >
In theory this would apply to kvm as well (coalesce tlb flush IPIs, lookup shadow page table once), but is it really a fast path? What triggers range operations for your use cases?
-- error compiling committee.c: too many arguments to function
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