Add tracepoint to wait_lapic_expire.
Signed-off-by: Marcelo Tosatti <[email protected]>
Index: kvm/arch/x86/kvm/lapic.c
===================================================================
--- kvm.orig/arch/x86/kvm/lapic.c
+++ kvm/arch/x86/kvm/lapic.c
@@ -1137,6 +1137,8 @@ void wait_lapic_expire(struct kvm_vcpu *
if (guest_tsc < tsc_deadline)
__delay(tsc_deadline - guest_tsc);
+
+ trace_kvm_wait_lapic_expire(vcpu->vcpu_id, guest_tsc - tsc_deadline);
}
static void start_apic_timer(struct kvm_lapic *apic)
Index: kvm/arch/x86/kvm/trace.h
===================================================================
--- kvm.orig/arch/x86/kvm/trace.h
+++ kvm/arch/x86/kvm/trace.h
@@ -914,6 +914,25 @@ TRACE_EVENT(kvm_pvclock_update,
__entry->flags)
);
+TRACE_EVENT(kvm_wait_lapic_expire,
+ TP_PROTO(unsigned int vcpu_id, s64 delta),
+ TP_ARGS(vcpu_id, delta),
+
+ TP_STRUCT__entry(
+ __field( unsigned int, vcpu_id )
+ __field( s64, delta )
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->delta = delta;
+ ),
+
+ TP_printk("vcpu %u: delta %lld",
+ __entry->vcpu_id,
+ __entry->delta)
+);
+
#endif /* _TRACE_KVM_H */
#undef TRACE_INCLUDE_PATH
--
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