From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: [RFC] Paravirt timer for KVM Date: Mon, 15 Oct 2007 10:41:43 +0200 Message-ID: <471327C7.8060304@redhat.com> References: <5d6222a80710120908s6b1f5845head84e7b7a463cd1@mail.gmail.com> <1192218507.14891.18.camel@basalt> <470FD2CA.1000702@codemonkey.ws> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel , Jeremy Fitzhardinge , Avi Kivity , Hollis Blanchard To: Anthony Liguori Return-path: In-Reply-To: <470FD2CA.1000702-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Hi, > 2) the TSC would have to be used as a clocksource. You don't know the > frequency which is the first problem with using the TSC but some systems > have a TSC that changes frequencies. Also note the tsc may stop ticking if the CPU goes sleep in C3, which IMHO makes the tsc almost useless as clocksource for guests ... cheers, Gerd ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/