From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MlRLG-00010l-Dq for qemu-devel@nongnu.org; Wed, 09 Sep 2009 13:52:26 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MlRLB-0000yC-Mo for qemu-devel@nongnu.org; Wed, 09 Sep 2009 13:52:25 -0400 Received: from [199.232.76.173] (port=45591 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MlRLB-0000y8-H3 for qemu-devel@nongnu.org; Wed, 09 Sep 2009 13:52:21 -0400 Received: from e38.co.us.ibm.com ([32.97.110.159]:44627) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MlRLA-0005eB-SX for qemu-devel@nongnu.org; Wed, 09 Sep 2009 13:52:21 -0400 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e38.co.us.ibm.com (8.14.3/8.13.1) with ESMTP id n89HmOok003895 for ; Wed, 9 Sep 2009 11:48:24 -0600 Received: from d03av01.boulder.ibm.com (d03av01.boulder.ibm.com [9.17.195.167]) by d03relay04.boulder.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id n89HqENp224566 for ; Wed, 9 Sep 2009 11:52:14 -0600 Received: from d03av01.boulder.ibm.com (loopback [127.0.0.1]) by d03av01.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n89HqErs009239 for ; Wed, 9 Sep 2009 11:52:14 -0600 Message-ID: <4AA7EB4C.205@us.ibm.com> Date: Wed, 09 Sep 2009 12:52:12 -0500 From: Anthony Liguori MIME-Version: 1.0 Subject: Re: [Qemu-devel] Re: [PATCH] re-set rtc date on reset handler References: <4AA68310.1050209@siemens.com> <4AA68B50.8000805@siemens.com> <4AA68DBB.9080000@siemens.com> <4AA79F67.9060401@redhat.com> <4AA7A61C.4050902@siemens.com> <4AA7AD43.30000@redhat.com> <4AA7AE45.6050104@siemens.com> <4AA7C411.9050008@redhat.com> <4AA7CB1E.8040409@us.ibm.com> <20090909160906.GH22885@redhat.com> In-Reply-To: <20090909160906.GH22885@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gleb Natapov Cc: Jan Kiszka , Glauber Costa , "dlaor@redhat.com" , "qemu-devel@nongnu.org" , Blue Swirl , Avi Kivity Gleb Natapov wrote: > What is "catchup" and what is "gradual"? > Just placeholders to point out that there are different algorithms to replaying interrupts to a guest. I called what we implemented "catchup" since we pretty much immediately send all of the missed ticks to the guest in order to catch-up. I'd imagine that a 'gradual' algorithm would shorten the tick interval until you've caught up. The Hyper-V paravirtualization manual has provisions for the guest to request what type of algorithm is used so it makes sense to accommodate this in our syntax. -- Regards, Anthony Liguori