Messages in this thread | | | Date | Mon, 2 Jul 2012 17:52:39 +0900 | From | Takuya Yoshikawa <> | Subject | [PATCH 0/8] KVM: Optimize MMU notifier's THP page invalidation -v4 |
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v3->v4: Resolved trace_kvm_age_page() issue -- patch 6,7 v2->v3: Fixed intersection calculations. -- patch 3, 8
Takuya
Takuya Yoshikawa (8): KVM: MMU: Use __gfn_to_rmap() to clean up kvm_handle_hva() KVM: Introduce hva_to_gfn_memslot() for kvm_handle_hva() KVM: MMU: Make kvm_handle_hva() handle range of addresses KVM: Introduce kvm_unmap_hva_range() for kvm_mmu_notifier_invalidate_range_start() KVM: Separate rmap_pde from kvm_lpage_info->write_count KVM: MMU: Add memslot parameter to hva handlers KVM: MMU: Push trace_kvm_age_page() into kvm_age_rmapp() KVM: MMU: Avoid handling same rmap_pde in kvm_handle_hva_range()
arch/powerpc/include/asm/kvm_host.h | 2 + arch/powerpc/kvm/book3s_64_mmu_hv.c | 47 ++++++++++++--- arch/x86/include/asm/kvm_host.h | 3 +- arch/x86/kvm/mmu.c | 107 +++++++++++++++++++++++------------ arch/x86/kvm/x86.c | 11 ++++ include/linux/kvm_host.h | 8 +++ virt/kvm/kvm_main.c | 3 +- 7 files changed, 131 insertions(+), 50 deletions(-)
From v2:
The new test result was impressively good, see below, and THP page invalidation was more than 5 times faster on my x86 machine.
Before: ... 19.852 us | __mmu_notifier_invalidate_range_start(); 28.033 us | __mmu_notifier_invalidate_range_start(); 19.066 us | __mmu_notifier_invalidate_range_start(); 44.715 us | __mmu_notifier_invalidate_range_start(); 31.613 us | __mmu_notifier_invalidate_range_start(); 20.659 us | __mmu_notifier_invalidate_range_start(); 19.979 us | __mmu_notifier_invalidate_range_start(); 20.416 us | __mmu_notifier_invalidate_range_start(); 20.632 us | __mmu_notifier_invalidate_range_start(); 22.316 us | __mmu_notifier_invalidate_range_start(); ...
After: ... 4.089 us | __mmu_notifier_invalidate_range_start(); 4.096 us | __mmu_notifier_invalidate_range_start(); 3.560 us | __mmu_notifier_invalidate_range_start(); 3.376 us | __mmu_notifier_invalidate_range_start(); 3.772 us | __mmu_notifier_invalidate_range_start(); 3.353 us | __mmu_notifier_invalidate_range_start(); 3.332 us | __mmu_notifier_invalidate_range_start(); 3.332 us | __mmu_notifier_invalidate_range_start(); 3.332 us | __mmu_notifier_invalidate_range_start(); 3.337 us | __mmu_notifier_invalidate_range_start(); ...
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