From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jacob Gorm Hansen Subject: Re: Re: Is continuous replication of state possible? Date: Mon, 10 Jan 2005 18:22:21 -0800 Message-ID: <41E3385D.2090906@diku.dk> References: <20050109030704.8BAB689DA7@sc8-sf-spam1.sourceforge.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: xen-devel-admin@lists.sourceforge.net Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: George Washington Dunlap III Cc: xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org George Washington Dunlap III wrote: > The main trick is that there are several different counters you could > use. The one spoken of mainly in the literature is the instruction > counter (which, on both Athlons and P4's is unusable). However, there > are repeatable branch counters on both platforms. Logging the > tuple at every interrupt allows us to re-deliver the > interrupts precisely. (See Mellor-Crummey89 for a software version of > this same idea.) > > Maybe sometime I'll post a whitepaper about the dirty details of doing > deterministic replay on P4's and Athlons. If you're interested, I have > an e-mail that I've already sent to several people (including the Xen > team) with the details. I'd like to see a copy of that email, thanks. Jacob ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt