KVM: Per-vcpu statistics

Make the exit statistics per-vcpu instead of global.  This gives a 3.5%
boost when running one virtual machine per core on my two socket dual core
(4 cores total) machine.

Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 18 insertions, 17 deletions

diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index b9c318a9e33..d1a90c5d76c 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -236,6 +236,22 @@ struct kvm_pio_request {
         int rep;
 };
 
+struct kvm_stat {
+        u32 pf_fixed;
+        u32 pf_guest;
+        u32 tlb_flush;
+        u32 invlpg;
+
+        u32 exits;
+        u32 io_exits;
+        u32 mmio_exits;
+        u32 signal_exits;
+        u32 irq_window_exits;
+        u32 halt_exits;
+        u32 request_irq_exits;
+        u32 irq_exits;
+};
+
 struct kvm_vcpu {
         struct kvm *kvm;
         union {
@@ -298,6 +314,8 @@ struct kvm_vcpu {
         int sigset_active;
         sigset_t sigset;
 
+        struct kvm_stat stat;
+
         struct {
                 int active;
                 u8 save_iopl;
@@ -347,22 +365,6 @@ struct kvm {
         struct file *filp;
 };
 
-struct kvm_stat {
-        u32 pf_fixed;
-        u32 pf_guest;
-        u32 tlb_flush;
-        u32 invlpg;
-
-        u32 exits;
-        u32 io_exits;
-        u32 mmio_exits;
-        u32 signal_exits;
-        u32 irq_window_exits;
-        u32 halt_exits;
-        u32 request_irq_exits;
-        u32 irq_exits;
-};
-
 struct descriptor_table {
         u16 limit;
         unsigned long base;
@@ -424,7 +426,6 @@ struct kvm_arch_ops {
                                 unsigned char *hypercall_addr);
 };
 
-extern struct kvm_stat kvm_stat;
 extern struct kvm_arch_ops *kvm_arch_ops;
 
 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)