From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759194AbXL3HZw (ORCPT ); Sun, 30 Dec 2007 02:25:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756571AbXL3HLf (ORCPT ); Sun, 30 Dec 2007 02:11:35 -0500 Received: from il.qumranet.com ([82.166.9.18]:59482 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751813AbXL3HKu (ORCPT ); Sun, 30 Dec 2007 02:10:50 -0500 From: Avi Kivity To: linux-kernel@vger.kernel.org, kvm-devel@lists.sourceforge.net Subject: [PATCH 41/52] KVM: Add statistic for remote tlb flushes Date: Sun, 30 Dec 2007 09:10:27 +0200 Message-Id: <1198998638-22713-42-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.3.7 In-Reply-To: <1198998638-22713-1-git-send-email-avi@qumranet.com> References: <1198998638-22713-1-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Avi Kivity --- drivers/kvm/kvm.h | 1 + drivers/kvm/kvm_main.c | 3 +++ drivers/kvm/x86.c | 1 + 3 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index b65f5de..048849d 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -300,6 +300,7 @@ struct kvm_vm_stat { u32 mmu_pde_zapped; u32 mmu_flooded; u32 mmu_recycled; + u32 remote_tlb_flush; }; struct kvm { diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index d99396b..411b2bd 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -115,6 +115,9 @@ void kvm_flush_remote_tlbs(struct kvm *kvm) if (cpu != -1 && cpu != raw_smp_processor_id()) cpu_set(cpu, cpus); } + if (cpus_empty(cpus)) + return; + ++kvm->stat.remote_tlb_flush; smp_call_function_mask(cpus, ack_flush, NULL, 1); } diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c index b482b6a..ac09f38 100644 --- a/drivers/kvm/x86.c +++ b/drivers/kvm/x86.c @@ -73,6 +73,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, { "mmu_flooded", VM_STAT(mmu_flooded) }, { "mmu_recycled", VM_STAT(mmu_recycled) }, + { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, { NULL } }; -- 1.5.3.7