From: "Radim Krčmář" <rkrcmar@redhat.com>
To: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Gleb Natapov <gleb@kernel.org>,
Raghavendra KT <raghavendra.kt@linux.vnet.ibm.com>,
Vinod Chegu <chegu_vinod@hp.com>, Hui-Zhi <hui-zhi.zhao@hp.com>,
Christian Borntraeger <borntraeger@de.ibm.com>
Subject: [PATCH v2 5/6] KVM: trace kvm_ple_window
Date: Wed, 20 Aug 2014 22:53:16 +0200 [thread overview]
Message-ID: <1408567997-21222-6-git-send-email-rkrcmar@redhat.com> (raw)
In-Reply-To: <1408567997-21222-1-git-send-email-rkrcmar@redhat.com>
Tracepoint for dynamic PLE window, fired on every potential change.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
---
arch/x86/kvm/trace.h | 25 +++++++++++++++++++++++++
arch/x86/kvm/vmx.c | 8 +++++---
arch/x86/kvm/x86.c | 1 +
3 files changed, 31 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index e850a7d..4b8e6cb 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -848,6 +848,31 @@ TRACE_EVENT(kvm_track_tsc,
__print_symbolic(__entry->host_clock, host_clocks))
);
+TRACE_EVENT(kvm_ple_window,
+ TP_PROTO(int grow, unsigned int vcpu_id, int new, int old),
+ TP_ARGS(grow, vcpu_id, new, old),
+
+ TP_STRUCT__entry(
+ __field( int, 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 ? "<+" : "<-",
+ __entry->old)
+);
+
#endif /* CONFIG_X86_64 */
#endif /* _TRACE_KVM_H */
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index e63d7ac..f63ac5d 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -5728,15 +5728,17 @@ static int __shrink_ple_window(int val, int shrinker, int minimum)
static void modify_ple_window(struct kvm_vcpu *vcpu, int grow)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
+ int old = vmx->ple_window;
int new;
if (grow)
- new = __grow_ple_window(vmx->ple_window);
+ new = __grow_ple_window(old)
else
- new = __shrink_ple_window(vmx->ple_window, ple_window_shrink,
- ple_window);
+ new = __shrink_ple_window(old, ple_window_shrink, ple_window);
vmx->ple_window = max(new, ple_window);
+
+ trace_kvm_ple_window(grow, vcpu->vcpu_id, vmx->ple_window, old);
}
#define grow_ple_window(vcpu) modify_ple_window(vcpu, 1)
#define shrink_ple_window(vcpu) modify_ple_window(vcpu, 0)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 5696ee7..814b20c 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7648,3 +7648,4 @@ 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);
--
2.0.4
next prev parent reply other threads:[~2014-08-20 20:54 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-20 20:53 [PATCH v2 0/6] Dynamic Pause Loop Exiting window Radim Krčmář
2014-08-20 20:53 ` [PATCH v2 1/6] KVM: add kvm_arch_sched_in Radim Krčmář
2014-08-21 8:29 ` Paolo Bonzini
2014-08-21 11:38 ` Radim Krčmář
2014-08-21 12:27 ` Paolo Bonzini
2014-08-21 12:50 ` Radim Krčmář
2014-08-21 13:25 ` Paolo Bonzini
2014-08-20 20:53 ` [PATCH v2 2/6] KVM: x86: introduce sched_in to kvm_x86_ops Radim Krčmář
2014-08-20 20:53 ` [PATCH v2 3/6] KVM: VMX: make PLE window per-VCPU Radim Krčmář
2014-08-21 8:25 ` Paolo Bonzini
2014-08-21 11:38 ` Radim Krčmář
2014-08-20 20:53 ` [PATCH v2 4/6] KVM: VMX: dynamise PLE window Radim Krčmář
2014-08-21 8:24 ` Paolo Bonzini
2014-08-21 11:47 ` Radim Krčmář
2014-08-21 8:26 ` Paolo Bonzini
2014-08-21 11:54 ` Radim Krčmář
2014-08-21 12:29 ` Paolo Bonzini
2014-08-21 12:42 ` Radim Krčmář
2014-08-21 13:18 ` Paolo Bonzini
2014-08-21 13:46 ` Radim Krčmář
2014-08-20 20:53 ` Radim Krčmář [this message]
2014-08-21 8:29 ` [PATCH v2 5/6] KVM: trace kvm_ple_window Paolo Bonzini
2014-08-21 11:56 ` Radim Krčmář
2014-08-21 13:22 ` Paolo Bonzini
2014-08-21 13:49 ` Radim Krčmář
2014-08-20 20:53 ` [PATCH v2 6/6] KVM: VMX: runtime knobs for dynamic PLE window Radim Krčmář
2014-08-21 6:49 ` [PATCH v2 0/6] Dynamic Pause Loop Exiting window Zhao, Hui-Zhi (Steven, HPservers-Core-OE-PSC)
2014-08-21 6:49 ` Zhao, Hui-Zhi (Steven, HPservers-Core-OE-PSC)
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