From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:40734) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QwY7H-0001Y7-Ql for qemu-devel@nongnu.org; Thu, 25 Aug 2011 07:29:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QwY7G-0003iN-G3 for qemu-devel@nongnu.org; Thu, 25 Aug 2011 07:28:59 -0400 Received: from thoth.sbs.de ([192.35.17.2]:34549) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QwY7G-0003iG-6G for qemu-devel@nongnu.org; Thu, 25 Aug 2011 07:28:58 -0400 Message-ID: <4E5631F7.1090006@siemens.com> Date: Thu, 25 Aug 2011 13:28:55 +0200 From: Jan Kiszka MIME-Version: 1.0 References: <3d9d904a1e4939a147f8954c9e0d4cdaf3d44c31.1314033132.git.jan.kiszka@siemens.com> <4E55F799.2050103@redhat.com> <4E5610E7.1030609@siemens.com> <4E5612F0.1030309@redhat.com> <4E561422.2000304@siemens.com> <4E5627E3.4070507@redhat.com> <4E562925.30100@siemens.com> <4E562FA7.7060803@redhat.com> In-Reply-To: <4E562FA7.7060803@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Avi Kivity Cc: Anthony Liguori , qemu-devel , Gerd Hoffmann On 2011-08-25 13:19, Avi Kivity wrote: > On 08/25/2011 01:51 PM, Jan Kiszka wrote: >>> >>> Plain F15 is slow. SR2 = SR4 = 0. >> >> So it's not using chain4 mode. Can you check what mode the adapter is >> actually in and how VRAM is accessed? Likely, there is nothing we can do >> about it. /me just wonders what makes F15 grub behave differently from >> other distro's versions... >> > > Do you remember offhand which registers I need to look at? No, just that there are quite a few. You could check e.g. http://www.osdever.net/FreeVGA/vga/vga.htm for descriptions. Also check what paths the mmio handlers take. > > We need a collection of gdb scripts to find a qdev, dump the memory > hierarchy, look up gpas, and get info about specific devices. ...or finally have a "device-show" monitor command to dump the device state. More stable /wrt QEMU internals. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux