Re: [PATCH v3 3/4] KVM: x86: add information about pending requests to kvm_exit tracepoint

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On 9/28/23 12:36, Maxim Levitsky wrote:
This allows to gather information on how often kvm interrupts vCPUs due
to specific requests.

Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
---
  arch/x86/kvm/trace.h | 8 ++++++--
  1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 28e8a63368cc02..e275a02a21e523 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -316,12 +316,14 @@ TRACE_EVENT(name,							     \
  		__field(	u32,	        intr_info	)	     \
  		__field(	u32,	        error_code	)	     \
  		__field(	unsigned int,	vcpu_id         )	     \
+		__field(	u64,		requests        )	     \
  	),								     \
  									     \
  	TP_fast_assign(							     \
  		__entry->guest_rip	= kvm_rip_read(vcpu);		     \
  		__entry->isa            = isa;				     \
  		__entry->vcpu_id        = vcpu->vcpu_id;		     \
+		__entry->requests       = READ_ONCE(vcpu->requests);	     \
  		static_call(kvm_x86_get_exit_info)(vcpu,		     \
  					  &__entry->exit_reason,	     \
  					  &__entry->info1,		     \
@@ -331,11 +333,13 @@ TRACE_EVENT(name,							     \
  	),								     \
  									     \
  	TP_printk("vcpu %u reason %s%s%s rip 0x%lx info1 0x%016llx "	     \
-		  "info2 0x%016llx intr_info 0x%08x error_code 0x%08x",	     \
+		  "info2 0x%016llx intr_info 0x%08x error_code 0x%08x "      \
+		  "requests 0x%016llx",					     \
  		  __entry->vcpu_id,					     \
  		  kvm_print_exit_reason(__entry->exit_reason, __entry->isa), \
  		  __entry->guest_rip, __entry->info1, __entry->info2,	     \
-		  __entry->intr_info, __entry->error_code)		     \
+		  __entry->intr_info, __entry->error_code, 		     \
+		  __entry->requests)					     \
  )
/*

Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>





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