[dpdk-users] DPDK support for wireless NICs

[dpdk-users] DPDK support for wireless NICs

[Arun Kumar]

Hi Developers,

I believe wireless NICs would be able to handle higher amount of data in
future and bringing in support of DPDK for wireless NICs earlier would be
beneficial to the wireless community. I would like to work on this.

Could you please share some light on how to proceed further. Whether this
is a feasible idea and what might be the benefits and cons.

Linux has the mac80211 framework helping 802.11 driver developers.
Suggestion on how to use this mac80211 framework along with DPDK would be
useful for me to proceed further.

Thanks,
Arun

Re: [dpdk-users] DPDK support for wireless NICs

[Stephen Hemminger]

On Wed, 20 Nov 2019 11:59:38 +0800 (GMT+08:00)
"Chengke Wang" <wongck@pku.edu.cn> wrote:

> 	Dear all,
> 
> 
> 
> 
> 	I found DPDK in order to implement a high-speed dataplane on 802.11ac. We have tested that in the scenario where two machines use Wi-Fi Direct to communicate, the goodput of TCP can reach above 800Mbps.
> 
> 
> 
> 
> 
> 
> 	However, I learned that DPDK does not support wireless NICs now. Does DPDK have special requirements of today’s commodity wireless NIC hardware? If not, is it feasible to bring in support of DPDK for wireless NICs with modification *only* to the NIC driver? We want to work on this if the change to the driver is all we need.
> 

There are no 802.11 wireless devices supported by DPDK and DPDK provides
raw packet access only, no TCP.

DPDK is generally not useful for data rates less than 1G bit/sec.
You either have slow CPU's or other TCP queuing issues (bufferbloat).

Checkout some of the queueing work in Linux and bufferbloat list.

[dpdk-users] DPDK support for wireless NICs

[Chengke Wang]

	Dear all,




	I found DPDK in order to implement a high-speed dataplane on 802.11ac. We have tested that in the scenario where two machines use Wi-Fi Direct to communicate, the goodput of TCP can reach above 800Mbps.






	However, I learned that DPDK does not support wireless NICs now. Does DPDK have special requirements of today’s commodity wireless NIC hardware? If not, is it feasible to bring in support of DPDK for wireless NICs with modification *only* to the NIC driver? We want to work on this if the change to the driver is all we need.



	Thanks,



	Chengke