diff mbox series

[v3,4/5] KVM: stats: Add halt_wait_ns stats for all architectures

Message ID 20210802165633.1866976-5-jingzhangos@google.com
State New
Headers show
Series Linear and Logarithmic histogram statistics | expand

Commit Message

Jing Zhang Aug. 2, 2021, 4:56 p.m. UTC 
Add simple stats halt_wait_ns to record the time a VCPU has spent on
waiting for all architectures (not just powerpc).

Signed-off-by: Jing Zhang <jingzhangos@google.com>
---
 arch/powerpc/include/asm/kvm_host.h | 1 -
 arch/powerpc/kvm/book3s.c           | 1 -
 arch/powerpc/kvm/book3s_hv.c        | 2 +-
 arch/powerpc/kvm/booke.c            | 1 -
 include/linux/kvm_host.h            | 3 ++-
 include/linux/kvm_types.h           | 1 +
 virt/kvm/kvm_main.c                 | 4 ++++
 7 files changed, 8 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 9f52f282b1aa..4931d03e5799 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -103,7 +103,6 @@  struct kvm_vcpu_stat {
 	u64 emulated_inst_exits;
 	u64 dec_exits;
 	u64 ext_intr_exits;
-	u64 halt_wait_ns;
 	u64 halt_successful_wait;
 	u64 dbell_exits;
 	u64 gdbell_exits;
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 5cc6e90095b0..b785f6772391 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -69,7 +69,6 @@  const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
 	STATS_DESC_COUNTER(VCPU, emulated_inst_exits),
 	STATS_DESC_COUNTER(VCPU, dec_exits),
 	STATS_DESC_COUNTER(VCPU, ext_intr_exits),
-	STATS_DESC_TIME_NSEC(VCPU, halt_wait_ns),
 	STATS_DESC_COUNTER(VCPU, halt_successful_wait),
 	STATS_DESC_COUNTER(VCPU, dbell_exits),
 	STATS_DESC_COUNTER(VCPU, gdbell_exits),
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 1d1fcc290fca..813ca155561b 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -4144,7 +4144,7 @@  static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
 
 	/* Attribute wait time */
 	if (do_sleep) {
-		vc->runner->stat.halt_wait_ns +=
+		vc->runner->stat.generic.halt_wait_ns +=
 			ktime_to_ns(cur) - ktime_to_ns(start_wait);
 		/* Attribute failed poll time */
 		if (vc->halt_poll_ns)
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 5ed6c235e059..977801c83aff 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -67,7 +67,6 @@  const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
 	STATS_DESC_COUNTER(VCPU, emulated_inst_exits),
 	STATS_DESC_COUNTER(VCPU, dec_exits),
 	STATS_DESC_COUNTER(VCPU, ext_intr_exits),
-	STATS_DESC_TIME_NSEC(VCPU, halt_wait_ns),
 	STATS_DESC_COUNTER(VCPU, halt_successful_wait),
 	STATS_DESC_COUNTER(VCPU, dbell_exits),
 	STATS_DESC_COUNTER(VCPU, gdbell_exits),
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index b90c9cb8ddbb..9b773fef7bba 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1402,7 +1402,8 @@  struct _kvm_stats_desc {
 	STATS_DESC_COUNTER(VCPU_GENERIC, halt_poll_invalid),		       \
 	STATS_DESC_COUNTER(VCPU_GENERIC, halt_wakeup),			       \
 	STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_poll_success_ns),	       \
-	STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_poll_fail_ns)
+	STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_poll_fail_ns),		       \
+	STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_wait_ns)
 
 extern struct dentry *kvm_debugfs_dir;
 
diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h
index ed6a985c5680..291ef55125b2 100644
--- a/include/linux/kvm_types.h
+++ b/include/linux/kvm_types.h
@@ -87,6 +87,7 @@  struct kvm_vcpu_stat_generic {
 	u64 halt_wakeup;
 	u64 halt_poll_success_ns;
 	u64 halt_poll_fail_ns;
+	u64 halt_wait_ns;
 };
 
 #define KVM_STATS_NAME_SIZE	48
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a96cbe24c688..af9bcb50fdd4 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3185,6 +3185,10 @@  void kvm_vcpu_block(struct kvm_vcpu *vcpu)
 	}
 	finish_rcuwait(&vcpu->wait);
 	cur = ktime_get();
+	if (waited) {
+		vcpu->stat.generic.halt_wait_ns +=
+			ktime_to_ns(cur) - ktime_to_ns(poll_end);
+	}
 out:
 	kvm_arch_vcpu_unblocking(vcpu);
 	block_ns = ktime_to_ns(cur) - ktime_to_ns(start);