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Commit 7b46268d authored by Radim Krčmář's avatar Radim Krčmář Committed by Paolo Bonzini
Browse files

KVM: trace kvm_ple_window grow/shrink 



Tracepoint for dynamic PLE window, fired on every potential change.

Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent b4a2d31d

arch/x86/kvm/trace.h

+30 −0
Original line number Diff line number Diff line
@@ -848,6 +848,36 @@ TRACE_EVENT(kvm_track_tsc, 
		  __print_symbolic(__entry->host_clock, host_clocks))

);



TRACE_EVENT(kvm_ple_window,

	TP_PROTO(bool grow, unsigned int vcpu_id, int new, int old),

	TP_ARGS(grow, vcpu_id, new, old),



	TP_STRUCT__entry(

		__field(                bool,      grow         )

		__field(        unsigned int,   vcpu_id         )

		__field(                 int,       new         )

		__field(                 int,       old         )

	),



	TP_fast_assign(

		__entry->grow           = grow;

		__entry->vcpu_id        = vcpu_id;

		__entry->new            = new;

		__entry->old            = old;

	),



	TP_printk("vcpu %u: ple_window %d (%s %d)",

	          __entry->vcpu_id,

	          __entry->new,

	          __entry->grow ? "grow" : "shrink",

	          __entry->old)

);



#define trace_kvm_ple_window_grow(vcpu_id, new, old) \

	trace_kvm_ple_window(true, vcpu_id, new, old)

#define trace_kvm_ple_window_shrink(vcpu_id, new, old) \

	trace_kvm_ple_window(false, vcpu_id, new, old)



#endif /* CONFIG_X86_64 */



#endif /* _TRACE_KVM_H */

arch/x86/kvm/vmx.c

+4 −0
Original line number Diff line number Diff line
@@ -5738,6 +5738,8 @@ static void grow_ple_window(struct kvm_vcpu *vcpu) 


	if (vmx->ple_window != old)

		vmx->ple_window_dirty = true;



	trace_kvm_ple_window_grow(vcpu->vcpu_id, vmx->ple_window, old);

}



static void shrink_ple_window(struct kvm_vcpu *vcpu)
@@ -5750,6 +5752,8 @@ static void shrink_ple_window(struct kvm_vcpu *vcpu) 


	if (vmx->ple_window != old)

		vmx->ple_window_dirty = true;



	trace_kvm_ple_window_shrink(vcpu->vcpu_id, vmx->ple_window, old);

}



/*

arch/x86/kvm/x86.c

+1 −0
Original line number Diff line number Diff line
@@ -7673,3 +7673,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); 
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window);