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

[Gerd Hoffmann]

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.

cheers,
  Gerd