Question regarding netgraph and threading

[Brett Glass]

All:

I have several large PPTP servers which are currently using ppp(8) 
and PoPTop (a userland PPTP server daemon which is, unfortunately, 
GPLed). They're having trouble under heavy loads, and so I'd like 
to switch to mpd5. However, even though mpd5 handles network 
connections in the kernel, via netgraph, I am worried about performance.

As far as I can see, all netgraph operations are performed by a 
single kernel thread named "ng_queue", while ppp(8) and PoPToP use 
many processes and thus can distribute their work among multiple CPU cores.

Is netgraph able to multithread, or is there a way to make it do so?

--Brett Glass