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authorRadim Krčmář <rkrcmar@redhat.com>2014-08-21 18:08:09 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2014-08-21 18:45:23 +0200
commit7b46268d29543e313e731606d845e65c17f232e4 (patch)
tree86571a9b8ed4dd0972a15cec127945b1a2138807
parentKVM: VMX: dynamise PLE window (diff)
downloadlinux-7b46268d29543e313e731606d845e65c17f232e4.tar.xz
linux-7b46268d29543e313e731606d845e65c17f232e4.zip
KVM: trace kvm_ple_window grow/shrink
Tracepoint for dynamic PLE window, fired on every potential change. Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--arch/x86/kvm/trace.h30
-rw-r--r--arch/x86/kvm/vmx.c4
-rw-r--r--arch/x86/kvm/x86.c1
3 files changed, 35 insertions, 0 deletions
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index e850a7d332be..1742dfbd26b3 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -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 */
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index baeac7f580a7..661abc2f7049 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -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);
}
/*
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 575d3fc67e7e..c10408ef9ab1 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -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);