Re: [Qemu-devel] [PATCH] starting qemu vnc session on a pre-allocated port

[Anthony Liguori]

Shahar Livne wrote:
> Hi Anthony,
>
> Thanks for your comment.
>
> The problem with the solution you suggest is that all VNC traffic will 
> be first sent to the unix domain socket, and then copied to the TCP 
> socket. This double work may be acceptable if we're talking about one 
> instance of qemu, but as I said, I run many concurrent sessions which 
> create too much load. In the solution I suggest, this extra copying is 
> not needed.

You're optimizing prematurely.  The overhead of the copy is negligible 
for something like VNC.  Under normal circumstances, we're talking about 
30-100k/s.  During idle usage, the bandwidth drops to almost nothing.

Regards,

Anthony Liguori

> Regards,
> Shahar