Commit f096ed85 authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: Add fpu_reload counter 



Measure the number of times we switch the fpu state.

Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent e1beb1d3

drivers/kvm/kvm.h

+1 −0
Original line number Diff line number Diff line
@@ -248,6 +248,7 @@ struct kvm_stat { 
	u32 irq_exits;

	u32 host_state_reload;

	u32 efer_reload;

	u32 fpu_reload;

};



struct kvm_io_device {

drivers/kvm/x86.c

+2 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { 
	{ "irq_exits", STAT_OFFSET(irq_exits) },

	{ "host_state_reload", STAT_OFFSET(host_state_reload) },

	{ "efer_reload", STAT_OFFSET(efer_reload) },

	{ "fpu_reload", STAT_OFFSET(fpu_reload) },

	{ NULL }

};
@@ -2417,6 +2418,7 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) 
	vcpu->guest_fpu_loaded = 0;

	fx_save(&vcpu->guest_fx_image);

	fx_restore(&vcpu->host_fx_image);

	++vcpu->stat.fpu_reload;

}

EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);