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authorAvi Kivity <avi@qumranet.com>2007-11-20 23:01:14 +0200
committerAvi Kivity <avi@qumranet.com>2008-01-30 17:53:10 +0200
commit0f74a24c59b814c1c8085251cbea48d339f0c7c6 (patch)
tree1102e9835f247b7c9d05887f36e2f8fa3b20681a /drivers
parente5a4c8cad952d6e060991841f3632578ab3ae133 (diff)
KVM: Add statistic for remote tlb flushes
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/kvm/kvm.h1
-rw-r--r--drivers/kvm/kvm_main.c3
-rw-r--r--drivers/kvm/x86.c1
3 files changed, 5 insertions, 0 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index b65f5dee4b1..048849d97b3 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -300,6 +300,7 @@ struct kvm_vm_stat {
u32 mmu_pde_zapped;
u32 mmu_flooded;
u32 mmu_recycled;
+ u32 remote_tlb_flush;
};
struct kvm {
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 7939b5c9a4b..aec6b67cfeb 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -115,6 +115,9 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
if (cpu != -1 && cpu != raw_smp_processor_id())
cpu_set(cpu, cpus);
}
+ if (cpus_empty(cpus))
+ return;
+ ++kvm->stat.remote_tlb_flush;
smp_call_function_mask(cpus, ack_flush, NULL, 1);
}
diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index b482b6a8a82..ac09f381f47 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -73,6 +73,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
{ "mmu_flooded", VM_STAT(mmu_flooded) },
{ "mmu_recycled", VM_STAT(mmu_recycled) },
+ { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
{ NULL }
};