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Date: Sun, 30 Dec 2007 09:09:54 +0200
From: Avi Kivity <avi@...ranet.com>
To: linux-kernel@...r.kernel.org, kvm-devel@...ts.sourceforge.net
Subject: [PATCH 08/52] KVM: MMU: Add some mmu statistics
Signed-off-by: Avi Kivity <avi@...ranet.com>
---
drivers/kvm/kvm.h | 6 ++++++
drivers/kvm/mmu.c | 9 ++++++++-
drivers/kvm/x86.c | 6 ++++++
3 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index d3171f9..bdcc44e 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -362,6 +362,12 @@ struct kvm_memory_slot {
};
struct kvm_vm_stat {
+ u32 mmu_shadow_zapped;
+ u32 mmu_pte_write;
+ u32 mmu_pte_updated;
+ u32 mmu_pde_zapped;
+ u32 mmu_flooded;
+ u32 mmu_recycled;
};
struct kvm {
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index 9be54a5..87d8e70 100644
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -755,6 +755,7 @@ static void kvm_mmu_zap_page(struct kvm *kvm,
{
u64 *parent_pte;
+ ++kvm->stat.mmu_shadow_zapped;
while (page->multimapped || page->parent_pte) {
if (!page->multimapped)
parent_pte = page->parent_pte;
@@ -1226,9 +1227,12 @@ static void mmu_pte_write_new_pte(struct kvm_vcpu *vcpu,
const void *new, int bytes,
int offset_in_pte)
{
- if (page->role.level != PT_PAGE_TABLE_LEVEL)
+ if (page->role.level != PT_PAGE_TABLE_LEVEL) {
+ ++vcpu->kvm->stat.mmu_pde_zapped;
return;
+ }
+ ++vcpu->kvm->stat.mmu_pte_updated;
if (page->role.glevels == PT32_ROOT_LEVEL)
paging32_update_pte(vcpu, page, spte, new, bytes,
offset_in_pte);
@@ -1263,6 +1267,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
int npte;
pgprintk("%s: gpa %llx bytes %d\n", __FUNCTION__, gpa, bytes);
+ ++vcpu->kvm->stat.mmu_pte_write;
kvm_mmu_audit(vcpu, "pre pte write");
if (gfn == vcpu->last_pt_write_gfn
&& !last_updated_pte_accessed(vcpu)) {
@@ -1296,6 +1301,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
pgprintk("misaligned: gpa %llx bytes %d role %x\n",
gpa, bytes, page->role.word);
kvm_mmu_zap_page(vcpu->kvm, page);
+ ++vcpu->kvm->stat.mmu_flooded;
continue;
}
page_offset = offset;
@@ -1344,6 +1350,7 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
page = container_of(vcpu->kvm->active_mmu_pages.prev,
struct kvm_mmu_page, link);
kvm_mmu_zap_page(vcpu->kvm, page);
+ ++vcpu->kvm->stat.mmu_recycled;
}
}
diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index 016abc3..fdc7632 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -66,6 +66,12 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "fpu_reload", VCPU_STAT(fpu_reload) },
{ "insn_emulation", VCPU_STAT(insn_emulation) },
{ "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
+ { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
+ { "mmu_pte_write", VM_STAT(mmu_pte_write) },
+ { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
+ { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
+ { "mmu_flooded", VM_STAT(mmu_flooded) },
+ { "mmu_recycled", VM_STAT(mmu_recycled) },
{ NULL }
};
--
1.5.3.7
--
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