On Mon, 21 Sep 2009 16:37:22 +0930
Rusty Russell <ru...@rustcorp.com.au> wrote:

> > > Actually this framework can apply to traditional network adapters which 
> > > have
> > > just one tx/rx queue pair. And applications using the same user/kernel 
> > > interface
> > > can utilize this framework to send/receive network traffic directly thru 
> > > a tx/rx
> > > queue pair in a network adapter.
> > > 

More importantly, when virtualizations is used with multi-queue NIC's the 
virtio-net
NIC is a single CPU bottleneck. The virtio-net NIC should preserve the 
parallelism (lock
free) using multiple receive/transmit queues. The number of queues should equal 
the
number of CPUs.
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