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KVM: MMU: Add some mmu statistics
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
parent
ba1389b7a0
commit
4cee576493
3 changed files with 20 additions and 1 deletions
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@ -362,6 +362,12 @@ struct kvm_memory_slot {
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};
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struct kvm_vm_stat {
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u32 mmu_shadow_zapped;
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u32 mmu_pte_write;
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u32 mmu_pte_updated;
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u32 mmu_pde_zapped;
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u32 mmu_flooded;
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u32 mmu_recycled;
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};
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struct kvm {
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@ -755,6 +755,7 @@ static void kvm_mmu_zap_page(struct kvm *kvm,
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{
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u64 *parent_pte;
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++kvm->stat.mmu_shadow_zapped;
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while (page->multimapped || page->parent_pte) {
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if (!page->multimapped)
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parent_pte = page->parent_pte;
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@ -1226,9 +1227,12 @@ static void mmu_pte_write_new_pte(struct kvm_vcpu *vcpu,
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const void *new, int bytes,
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int offset_in_pte)
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{
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if (page->role.level != PT_PAGE_TABLE_LEVEL)
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if (page->role.level != PT_PAGE_TABLE_LEVEL) {
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++vcpu->kvm->stat.mmu_pde_zapped;
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return;
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}
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++vcpu->kvm->stat.mmu_pte_updated;
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if (page->role.glevels == PT32_ROOT_LEVEL)
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paging32_update_pte(vcpu, page, spte, new, bytes,
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offset_in_pte);
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@ -1263,6 +1267,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
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int npte;
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pgprintk("%s: gpa %llx bytes %d\n", __FUNCTION__, gpa, bytes);
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++vcpu->kvm->stat.mmu_pte_write;
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kvm_mmu_audit(vcpu, "pre pte write");
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if (gfn == vcpu->last_pt_write_gfn
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&& !last_updated_pte_accessed(vcpu)) {
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@ -1296,6 +1301,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
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pgprintk("misaligned: gpa %llx bytes %d role %x\n",
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gpa, bytes, page->role.word);
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kvm_mmu_zap_page(vcpu->kvm, page);
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++vcpu->kvm->stat.mmu_flooded;
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continue;
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}
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page_offset = offset;
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@ -1344,6 +1350,7 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
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page = container_of(vcpu->kvm->active_mmu_pages.prev,
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struct kvm_mmu_page, link);
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kvm_mmu_zap_page(vcpu->kvm, page);
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++vcpu->kvm->stat.mmu_recycled;
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}
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}
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@ -66,6 +66,12 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
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{ "fpu_reload", VCPU_STAT(fpu_reload) },
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{ "insn_emulation", VCPU_STAT(insn_emulation) },
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{ "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
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{ "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
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{ "mmu_pte_write", VM_STAT(mmu_pte_write) },
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{ "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
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{ "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
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{ "mmu_flooded", VM_STAT(mmu_flooded) },
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{ "mmu_recycled", VM_STAT(mmu_recycled) },
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{ NULL }
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};
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