On 10/03/2011 10:37 AM, Alon Levy wrote:
>
> Hi,
> won't there be an overhead for rendering on a non continuous
> surface? Will it be worthwhile comparing to not creating the
> surface?
If I use a scatter-gather list there is overhead of allocating and
copying the surface whenever I want to synchronize. Minimally once
to copy from guest to host, and another copy from host to guest
for any update_area. (we can only copy the required area.
If I use page remapping like remap_file_pages does, I don't think
there is any overhead for rendering. There is overhead for doing
the remap_file_pages calls, but they are minimal (or so the man page
says). I should benchmark this.
It's not trivial; and kvm and smp magnify the cost. It shouldn't be
done as part of normal rendering (setup is okay).
--
error compiling committee.c: too many arguments to function
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