From f096ed8588b53bf802b84862c6c4d00d25d1ed72 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Sun, 18 Nov 2007 13:54:33 +0200 Subject: [PATCH] KVM: Add fpu_reload counter Measure the number of times we switch the fpu state. Signed-off-by: Avi Kivity --- drivers/kvm/kvm.h | 1 + drivers/kvm/x86.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index 04efe8833e0..a85c5903591 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -248,6 +248,7 @@ struct kvm_stat { u32 irq_exits; u32 host_state_reload; u32 efer_reload; + u32 fpu_reload; }; struct kvm_io_device { diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c index 923dfd4e0af..c1211e125b4 100644 --- a/drivers/kvm/x86.c +++ b/drivers/kvm/x86.c @@ -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); -- 2.20.1