From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LPL8S-0004Xw-DP for qemu-devel@nongnu.org; Tue, 20 Jan 2009 13:15:36 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LPL8R-0004XS-3x for qemu-devel@nongnu.org; Tue, 20 Jan 2009 13:15:36 -0500 Received: from [199.232.76.173] (port=58994 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LPL8Q-0004XP-TN for qemu-devel@nongnu.org; Tue, 20 Jan 2009 13:15:34 -0500 Received: from caffeine.csclub.uwaterloo.ca ([129.97.134.17]:58270) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1LPL8Q-0000X5-Mg for qemu-devel@nongnu.org; Tue, 20 Jan 2009 13:15:34 -0500 Date: Tue, 20 Jan 2009 13:15:33 -0500 Subject: Re: [Qemu-devel] Re: Extremely slow graphic updates Message-ID: <20090120181533.GZ29175@csclub.uwaterloo.ca> References: <20090119162633.GO29175@csclub.uwaterloo.ca> <20090119194221.GS29175@csclub.uwaterloo.ca> <20090120005351.GV29175@csclub.uwaterloo.ca> <200901200133.25029.paul@codesourcery.com> <4975B3F6.6050706@eu.citrix.com> <20090120144518.GW29175@csclub.uwaterloo.ca> <4975EC17.3090404@eu.citrix.com> <20090120165534.GY29175@csclub.uwaterloo.ca> <20090120170933.GF5177@const.bordeaux.inria.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090120170933.GF5177@const.bordeaux.inria.fr> From: lsorense@csclub.uwaterloo.ca (Lennart Sorensen) Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paul Brook , Stefano Stabellini On Tue, Jan 20, 2009 at 06:09:33PM +0100, Samuel Thibault wrote: > Ah, that rings me a bell. There was problem with that, something like > now that sdl uses SDL_BlitSurface/SDL_Flip there is an X roundtrip, > which is awfully slow over ssh. Would you be able to try without ssh? That would be tricky since it is running on another machine. I will try. I do believe someone else said that they could confirm the slow behaviour with 6336 running locally as well. It may be that some X drivers are slow at SDL_Flip and SDL_BlitSurface. Hmm, my X server isn't compiled to allow tcp connections (only local sockets), so avoiding ssh looks hard too. Maybe Xvnc can do it. yeah Xvnc4 as an X server did the job, and I vnc'd to it so qemu was running entirely locally on the machine with an X connection. Works at normal speed. So how does one fix this, since the change in 6336 makes it rather painful for those where SDL_Flip and company are inefficient. -- Len Sorensen