Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755106AbcLSJr3 (ORCPT ); Mon, 19 Dec 2016 04:47:29 -0500 Received: from mail-wj0-f193.google.com ([209.85.210.193]:33687 "EHLO mail-wj0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754256AbcLSJrX (ORCPT ); Mon, 19 Dec 2016 04:47:23 -0500 From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: rkrcmar@redhat.com, rkagan@virtuozzo.com, dplotnikov@virtuozzo.com Subject: [RFC PATCH v3 0/6] KVM: x86: avoid redundant REQ_EVENT Date: Mon, 19 Dec 2016 10:47:12 +0100 Message-Id: <1482140838-6303-1-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1234 Lines: 33 This is the result of cleaning up the places that set REQ_EVENT unnecessarily. The savings on self-IPI kvm-unit-tests are: self_ipi_sti_nop ~300 clock cycles self_ipi_sti_hlt ~300 clock cycles self_ipi_tpr ~400 clock cycles self_ipi_tpr_sti_nop ~700 clock cycles self_ipi_tpr_sti_hlt ~700 clock cycles which is in the 5-10% range. Please help me comparing this series with "[PATCH v2] KVM: x86: avoid redundant REQ_EVENT" on the real workload! Thanks, Paolo Paolo Bonzini (6): KVM: x86: add VCPU stat for KVM_REQ_EVENT processing KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on EOI KVM: vmx: speed up TPR below threshold vmexits KVM: lapic: remove unnecessary KVM_REQ_EVENT on PPR update KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on PPR update KVM: lapic: do not scan IRR when delivering an interrupt arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/lapic.c | 58 +++++++++++++++++++++++++---------------- arch/x86/kvm/lapic.h | 1 + arch/x86/kvm/vmx.c | 2 +- arch/x86/kvm/x86.c | 2 ++ 5 files changed, 41 insertions(+), 23 deletions(-) -- 1.8.3.1