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

From: Anthony Liguori
Subject: Re: [Qemu-devel] [PATCH] starting qemu vnc session on a pre-allocated port
Date: Sun, 24 Jun 2007 17:40:22 -0500
User-agent: Thunderbird (X11/20070604)

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.


Anthony Liguori


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