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KVM: Add fpu_reload counter
Measure the number of times we switch the fpu state. Signed-off-by: Avi Kivity <avi@qumranet.com>
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2 changed files with 3 additions and 0 deletions
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@ -248,6 +248,7 @@ struct kvm_stat {
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u32 irq_exits;
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u32 host_state_reload;
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u32 efer_reload;
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u32 fpu_reload;
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};
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struct kvm_io_device {
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@ -62,6 +62,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
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{ "irq_exits", STAT_OFFSET(irq_exits) },
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{ "host_state_reload", STAT_OFFSET(host_state_reload) },
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{ "efer_reload", STAT_OFFSET(efer_reload) },
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{ "fpu_reload", STAT_OFFSET(fpu_reload) },
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{ NULL }
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};
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@ -2417,6 +2418,7 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
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vcpu->guest_fpu_loaded = 0;
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fx_save(&vcpu->guest_fx_image);
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fx_restore(&vcpu->host_fx_image);
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++vcpu->stat.fpu_reload;
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}
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EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
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