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Re: [Qemu-devel] [PATCH] Add QEMU DirectFB display driver

From: Gerd Hoffmann
Subject: Re: [Qemu-devel] [PATCH] Add QEMU DirectFB display driver
Date: Tue, 18 May 2010 13:20:08 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100430 Fedora/3.0.4-2.fc12 Thunderbird/3.0.4

On 05/18/10 12:34, Stefano Stabellini wrote:

I am curious about one thing: if the spice client is running on the same
host as the VM and qemu, is there any plan for sharing memory somehow
between the two components? OR is it not believed to be necessary to
reach good performances?

Well. We don't have shm for vnc. And I think the reason simply is that it feels fast enougth even without shm. Spice tries to reduce the network bandwith needed with image caching, so with spice the gains by using shm should be even smaller than with vnc.

I'm not aware of anyone trying + benchmark it, but I don't expect major gains.


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