From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753975AbdLHPKY (ORCPT ); Fri, 8 Dec 2017 10:10:24 -0500 Received: from aserp2130.oracle.com ([141.146.126.79]:49172 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753718AbdLHPKW (ORCPT ); Fri, 8 Dec 2017 10:10:22 -0500 Date: Fri, 8 Dec 2017 10:10:14 -0500 From: Konrad Rzeszutek Wilk To: Quan Xu Cc: pbonzini@redhat.com, rkrcmar@redhat.com, yang.zhang.wz@gmail.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Ben Luo Subject: Re: [PATCH RFC 0/7] kvm pvtimer Message-ID: <20171208151014.GE12069@x230.dumpdata.com> References: <1512722390-3654-1-git-send-email-quan.xu0@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1512722390-3654-1-git-send-email-quan.xu0@gmail.com> User-Agent: Mutt/1.9.0 (2017-09-02) X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8738 signatures=668644 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=361 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1711220000 definitions=main-1712080209 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Dec 08, 2017 at 04:39:43PM +0800, Quan Xu wrote: > From: Ben Luo > > This patchset introduces a new paravirtualized mechanism to reduce VM-exit > caused by guest timer accessing. And how bad is this blib in arming the timer? And how often do you get this timer to be armed? OR better yet - what are the workloads in which you found this VMExit to be painful? Thanks. Or better yet - what are the workloads in which you found this VMExit to be painful?