On Wed, Jun 30, 2010 at 03:18:44PM +0200, Alexander Graf wrote:
> Book3s suffered from my really bad shadow MMU implementation so far. So
> I finally got around to implement a combined hash and list mechanism that
> allows for much faster lookup of mapped pages.
>
> To show that it really is faster, I tried to run simple process spawning
> code inside the guest with and without these patches:
>
> [without]
>
> debian-powerpc:~# time for i in {1..1000}; do /bin/echo hello > /dev/null; done
>
> real 0m20.235s
> user 0m10.418s
> sys 0m9.766s
>
> [with]
>
> debian-powerpc:~# time for i in {1..1000}; do /bin/echo hello > /dev/null; done
>
> real 0m14.659s
> user 0m8.967s
> sys 0m5.688s
>
> So as you can see, performance improved significantly.
>
> v2 -> v3:
>
> - use hlist
> - use global slab cache
>
> Alexander Graf (2):
> KVM: PPC: Add generic hpte management functions
> KVM: PPC: Make use of hash based Shadow MMU
>
> arch/powerpc/include/asm/kvm_book3s.h | 9 +
> arch/powerpc/include/asm/kvm_host.h | 17 ++-
> arch/powerpc/kvm/Makefile | 2 +
> arch/powerpc/kvm/book3s.c | 14 ++-
> arch/powerpc/kvm/book3s_32_mmu_host.c | 104 ++-----------
> arch/powerpc/kvm/book3s_64_mmu_host.c | 98 +-----------
> arch/powerpc/kvm/book3s_mmu_hpte.c | 277 +++++++++++++++++++++++++++++++++
> 7 files changed, 331 insertions(+), 190 deletions(-)
> create mode 100644 arch/powerpc/kvm/book3s_mmu_hpte.c
Applied, thanks.
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