Netgraph multithreading

[Алексей Якименко]

Hello!

Can you help me please? Is Netgraph supports multithreading in FreeBSD 8.1
? I found that in the function "ngb_mod_event" (ng_base.c, line 3114) multiple
threads runs function "ngthread" (ng_base.c, line 3315). What does this
function?

Or another question. Where is the parallelization of handling the traffic:
in driver of network adapter or Netgraph?

Thank you!
-- 
Alexey.