From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42961) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e6ZL2-0001Dm-IM for qemu-devel@nongnu.org; Mon, 23 Oct 2017 05:48:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e6ZL0-0006sl-Sc for qemu-devel@nongnu.org; Mon, 23 Oct 2017 05:48:03 -0400 Received: from mail-wr0-x231.google.com ([2a00:1450:400c:c0c::231]:50858) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1e6ZL0-0006sX-LX for qemu-devel@nongnu.org; Mon, 23 Oct 2017 05:48:02 -0400 Received: by mail-wr0-x231.google.com with SMTP id p96so2795712wrb.7 for ; Mon, 23 Oct 2017 02:48:02 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <20171019205409.GA4170@flamenco> <545610a4882f4c5494b30b7eab66b984@EXCHCS32.ornl.gov> From: Peter Maydell Date: Mon, 23 Oct 2017 10:47:41 +0100 Message-ID: Content-Type: text/plain; charset="UTF-8" Subject: Re: [Qemu-devel] Running Qemu in discrete time/step by step List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Matt Cc: "Nutaro, James J." , "Emilio G. Cota" , "qemu-devel@nongnu.org" , Hajime Tazaki On 23 October 2017 at 10:38, Matt wrote: > I did not know about Qemu's record/replay mode which is an interesting > feature but unneeded if a 2nd qemu run with the same inputs generated > the same outputs (as it's the case with DCE). Depends what you're trying to do. Deterministic execution is a prerequisite for record-and-replay, and sometimes determinism is all you need, but record-and-replay can provide more than that. thanks -- PMM