github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-27 00:22:00 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: SVM: Introduce trace point for the slow-path of avic_kic_target_vcpus

Browse Source 
This can help identify potential performance issues when handles
AVIC incomplete IPI due vCPU not running.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220420154954.19305-3-suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Suravee Suthikulpanit 2022-04-20 10:49:54 -05:00 committed by Paolo Bonzini
parent 7223fd2d53
commit 9f084f7c2e
3 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/kvm/svm/avic.c
View File

@ -354,6 +354,8 @@ static void avic_kick_target_vcpus(struct kvm *kvm, struct kvm_lapic *source,
if (!avic_kick_target_vcpus_fast(kvm, source, icrl, icrh, index))
return;
trace_kvm_avic_kick_vcpu_slowpath(icrh, icrl, index);
/*
* Wake any target vCPUs that are blocking, i.e. waiting for a wake
* event. There's no need to signal doorbells, as hardware has handled

20
arch/x86/kvm/trace.h
View File

@ -1459,6 +1459,26 @@ TRACE_EVENT(kvm_avic_ga_log,
__entry->vmid, __entry->vcpuid)
);
TRACE_EVENT(kvm_avic_kick_vcpu_slowpath,
TP_PROTO(u32 icrh, u32 icrl, u32 index),
TP_ARGS(icrh, icrl, index),
TP_STRUCT__entry(
__field(u32, icrh)
__field(u32, icrl)
__field(u32, index)
),
TP_fast_assign(
__entry->icrh = icrh;
__entry->icrl = icrl;
__entry->index = index;
),
TP_printk("icrh:icrl=%#08x:%08x, index=%u",
__entry->icrh, __entry->icrl, __entry->index)
);
TRACE_EVENT(kvm_hv_timer_state,
TP_PROTO(unsigned int vcpu_id, unsigned int hv_timer_in_use),
TP_ARGS(vcpu_id, hv_timer_in_use),

1
arch/x86/kvm/x86.c
View File

@ -13072,6 +13072,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_ga_log);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_kick_vcpu_slowpath);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_accept_irq);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_enter);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_exit);