From owner-freebsd-virtualization@FreeBSD.ORG Tue Aug 19 09:06:50 2014 Return-Path: Delivered-To: freebsd-virtualization@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 894535CE for ; Tue, 19 Aug 2014 09:06:50 +0000 (UTC) Received: from srv1.unix-users.de (srv1.unix-users.de [81.20.131.154]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "smtp.unix-users.de", Issuer "StartCom Class 1 Primary Intermediate Server CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 18D223378 for ; Tue, 19 Aug 2014 09:06:49 +0000 (UTC) Received: from localhost (bchm-d9bb93a2.pool.mediaWays.net [217.187.147.162]) (authenticated bits=0) by srv1.unix-users.de (8.14.9/8.14.5) with ESMTP id s7J96dkR056713 (version=TLSv1/SSLv3 cipher=AES128-GCM-SHA256 bits=128 verify=NO); Tue, 19 Aug 2014 11:06:39 +0200 (CEST) (envelope-from martin@steegmanns.net) X-Authentication-Warning: srv1.unix-users.de: Host bchm-d9bb93a2.pool.mediaWays.net [217.187.147.162] claimed to be localhost Date: Tue, 19 Aug 2014 11:06:38 +0200 From: Martin Steegmanns To: Neel Natu Subject: Re: Problem with vmexit on mtrap Message-ID: <20140819090638.GD5519@mail.demonism.de> References: <20140812092407.GC11403@mail.demonism.de> <20140816193345.GC5519@mail.demonism.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.4.3 (srv1.unix-users.de [81.20.131.154]); Tue, 19 Aug 2014 11:06:39 +0200 (CEST) Cc: "freebsd-virtualization@freebsd.org" X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Aug 2014 09:06:50 -0000 On Mon, Aug 18, 2014 at 08:59:28PM -0700, Neel Natu wrote: > > I wonder if a vmexit caused by the MTF could overlay with another > > vmexit. With the MTF bit set, I expect the guest system to > > behave exactly as without the MTF bit. Of course slower due to > > single stepping :). > > On my Xeon E5-2650 running at 2.0GHz a single vcpu VM is still not at > the login prompt after 7+ hours with MTRAP enabled. > > However, it is making forward progress and is chugging through the > /etc/rc startup scripts very slowly. Thank you! I assumed malfunction because I did no expect it to be that slow. Regards, Martin