From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753486AbaHUQKy (ORCPT ); Thu, 21 Aug 2014 12:10:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:63938 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753400AbaHUQKu (ORCPT ); Thu, 21 Aug 2014 12:10:50 -0400 From: =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Paolo Bonzini , Gleb Natapov , Raghavendra KT , Vinod Chegu , Hui-Zhi Zhao , Christian Borntraeger , Lisa Mitchell Subject: [PATCH v3 5/7] KVM: trace kvm_ple_window grow/shrink Date: Thu, 21 Aug 2014 18:08:09 +0200 Message-Id: <1408637291-18533-6-git-send-email-rkrcmar@redhat.com> In-Reply-To: <1408637291-18533-1-git-send-email-rkrcmar@redhat.com> References: <1408637291-18533-1-git-send-email-rkrcmar@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Tracepoint for dynamic PLE window, fired on every potential change. Signed-off-by: Radim Krčmář --- arch/x86/kvm/trace.h | 30 ++++++++++++++++++++++++++++++ arch/x86/kvm/vmx.c | 10 ++++++++-- arch/x86/kvm/x86.c | 1 + 3 files changed, 39 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index e850a7d..1742dfb 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 a2fa6ba..273cbd5 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -5728,16 +5728,22 @@ static int __shrink_ple_window(int val, int modifier, int minimum) static void grow_ple_window(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); + int old = vmx->ple_window; - vmx->ple_window = __grow_ple_window(vmx->ple_window); + vmx->ple_window = __grow_ple_window(old); + + trace_kvm_ple_window_grow(vcpu->vcpu_id, vmx->ple_window, old); } static void shrink_ple_window(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); + int old = vmx->ple_window; - vmx->ple_window = __shrink_ple_window(vmx->ple_window, + vmx->ple_window = __shrink_ple_window(old, ple_window_shrink, ple_window); + + 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 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); -- 2.1.0