Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755547Ab2FTH7t (ORCPT ); Wed, 20 Jun 2012 03:59:49 -0400 Received: from e28smtp09.in.ibm.com ([122.248.162.9]:58390 "EHLO e28smtp09.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755422Ab2FTH7s (ORCPT ); Wed, 20 Jun 2012 03:59:48 -0400 Message-ID: <4FE182ED.40200@linux.vnet.ibm.com> Date: Wed, 20 Jun 2012 15:59:41 +0800 From: Xiao Guangrong User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: Xiao Guangrong CC: Avi Kivity , Marcelo Tosatti , LKML , KVM Subject: [PATCH v7 08/10] KVM: MMU: trace fast page fault References: <4FE1822D.8010002@linux.vnet.ibm.com> In-Reply-To: <4FE1822D.8010002@linux.vnet.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit x-cbid: 12062007-2674-0000-0000-000004F5C259 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2408 Lines: 78 To see what happen on this path and help us to optimize it Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mmu.c | 2 ++ arch/x86/kvm/mmutrace.h | 38 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 37c0230..fc221f9 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2778,6 +2778,8 @@ static bool fast_page_fault(struct kvm_vcpu *vcpu, gva_t gva, int level, */ ret = fast_pf_fix_direct_spte(vcpu, iterator.sptep, spte); exit: + trace_fast_page_fault(vcpu, gva, error_code, iterator.sptep, + spte, ret); walk_shadow_page_lockless_end(vcpu); return ret; diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h index 89fb0e8..c364abc 100644 --- a/arch/x86/kvm/mmutrace.h +++ b/arch/x86/kvm/mmutrace.h @@ -243,6 +243,44 @@ TRACE_EVENT( TP_printk("addr:%llx gfn %llx access %x", __entry->addr, __entry->gfn, __entry->access) ); + +#define __spte_satisfied(__spte) \ + (__entry->retry && is_writable_pte(__entry->__spte)) + +TRACE_EVENT( + fast_page_fault, + TP_PROTO(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, + u64 *sptep, u64 old_spte, bool retry), + TP_ARGS(vcpu, gva, error_code, sptep, old_spte, retry), + + TP_STRUCT__entry( + __field(int, vcpu_id) + __field(gva_t, gva) + __field(u32, error_code) + __field(u64 *, sptep) + __field(u64, old_spte) + __field(u64, new_spte) + __field(bool, retry) + ), + + TP_fast_assign( + __entry->vcpu_id = vcpu->vcpu_id; + __entry->gva = gva; + __entry->error_code = error_code; + __entry->sptep = sptep; + __entry->old_spte = old_spte; + __entry->new_spte = *sptep; + __entry->retry = retry; + ), + + TP_printk("vcpu %d gva %lx error_code %s sptep %p old %#llx" + " new %llx spurious %d fixed %d", __entry->vcpu_id, + __entry->gva, __print_flags(__entry->error_code, "|", + kvm_mmu_trace_pferr_flags), __entry->sptep, + __entry->old_spte, __entry->new_spte, + __spte_satisfied(old_spte), __spte_satisfied(new_spte) + ) +); #endif /* _TRACE_KVMMMU_H */ #undef TRACE_INCLUDE_PATH -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/