[dpdk-dev] KNI discussion in userspace event

[Stephen Hemminger]

On Fri, 28 Oct 2016 15:31:50 +0100
Ferruh Yigit <ferruh.yigit at intel.com> wrote:

> Discussed alternatives were:
> * Tun/Tap
> This won't be as fast as KNI and performance is an issue.


That is a myth. Both require the some number of copies.
TUN/TAP copies is a syscall and KNI copies is a kthread.
Actually, the KNI method is worse because it has kernel thread
always running chewing a CPU. I.e it is pure poll mode.