diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2014-12-16 09:08:16 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-01-08 22:48:01 +0100 |
| commit | 6c19b7538f5ae2b6cdf91ab29f7fddf7320ece5b (patch) | |
| tree | 895ff83a5ea372ff983d2458652f1995d06e6381 /arch/x86/kvm | |
| parent | d0659d946be05e098883b6955d2764595997f6a4 (diff) | |
KVM: x86: add tracepoint to wait_lapic_expire
Add tracepoint to wait_lapic_expire.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
[Remind reader if early or late. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/trace.h | 20 |
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index e1c0befaa9f..3eb7f8d9992 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1134,6 +1134,7 @@ void wait_lapic_expire(struct kvm_vcpu *vcpu) tsc_deadline = apic->lapic_timer.expired_tscdeadline; apic->lapic_timer.expired_tscdeadline = 0; guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu, native_read_tsc()); + trace_kvm_wait_lapic_expire(vcpu->vcpu_id, guest_tsc - tsc_deadline); /* __delay is delay_tsc whenever the hardware has TSC, thus always. */ if (guest_tsc < tsc_deadline) diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index c2a34bb5ad9..587149bd6f7 100644 --- a/arch/x86/kvm/trace.h +++ b/arch/x86/kvm/trace.h @@ -914,6 +914,26 @@ 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 (%s)", + __entry->vcpu_id, + __entry->delta, + __entry->delta < 0 ? "early" : "late") +); + #endif /* _TRACE_KVM_H */ #undef TRACE_INCLUDE_PATH |