From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59255) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V3l9l-0004GQ-VN for qemu-devel@nongnu.org; Mon, 29 Jul 2013 06:58:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1V3l9f-0002k1-SS for qemu-devel@nongnu.org; Mon, 29 Jul 2013 06:58:25 -0400 Received: from emh07.mail.saunalahti.fi ([62.142.5.117]:56752) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V3l9f-0002je-IK for qemu-devel@nongnu.org; Mon, 29 Jul 2013 06:58:19 -0400 Date: Mon, 29 Jul 2013 13:58:10 +0300 From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= Message-ID: <20130729105810.GR2924@reaktio.net> References: <33183CC9F5247A488A2544077AF190207EF6A7E6@szxeml538-mbx.china.huawei.com> <33183CC9F5247A488A2544077AF190207EF6BEC3@szxeml538-mbx.china.huawei.com> <33183CC9F5247A488A2544077AF190207EF6BF06@szxeml538-mbx.china.huawei.com> <51F24949.4070109@suse.de> <51F24D24.4020201@redhat.com> <20130727115118.GM2924@reaktio.net> <33183CC9F5247A488A2544077AF190207EF6F2CC@szxeml538-mbs.china.huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <33183CC9F5247A488A2544077AF190207EF6F2CC@szxeml538-mbs.china.huawei.com> Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [Xen-devel] Cirrus VGA slow screen update, show blank screen last 13s or so for windows XP guest List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Gonglei (Arei)" Cc: Hanweidong , Luonengjun , "qemu-devel@nongnu.org" , "xen-devel@lists.xen.org" , Gerd Hoffmann , Anthony Liguori , Andreas =?iso-8859-1?Q?F=E4rber?= , "Huangweidong (Hardware)" On Mon, Jul 29, 2013 at 08:48:54AM +0000, Gonglei (Arei) wrote: > > -----Original Message----- > > From: Pasi K=E4rkk=E4inen [mailto:pasik@iki.fi] > > Sent: Saturday, July 27, 2013 7:51 PM > > To: Gerd Hoffmann > > Cc: Andreas F=E4rber; Hanweidong; Luonengjun; qemu-devel@nongnu.org; > > xen-devel@lists.xen.org; Gonglei (Arei); Anthony Liguori; Huangweidon= g > > (Hardware) > > Subject: Re: [Xen-devel] [Qemu-devel] Cirrus VGA slow screen update, = show > > blank screen last 13s or so for windows XP guest > >=20 > > On Fri, Jul 26, 2013 at 12:19:16PM +0200, Gerd Hoffmann wrote: > > > > > > Maybe the xen guys did some optimizations in qemu-dm which where no= t > > > merged upstream. Try asking @ xen-devel. > > > > >=20 > > Yeah, xen qemu-dm must have some optimization for cirrus that isn't i= n > > upstream qemu. >=20 > Hi, Pasi. Would you give me some more details? Thanks! >=20 Unfortunately I don't have any more details.. I was just assuming if xen = qemu-dm is fast, but upstream qemu is slow, there might be some optimization in xen qemu-d= m ..=20 Did you check the xen qemu-dm (traditional) history / commits?=20 -- Pasi > -Gonglei >=20 > > > Beside that the standard vga usually is the better choice anyway as= it > > > supports more video memory and higher resolutions than cirrus. > > > > >=20 > > One of the reasons to use emulated Cirrus is that there's a KMS drive= r for it. > > Is there one for the emulated stdvga adapter? > >=20 > > -- Pasi >=20