[dts] DDP / testpmd setup

Sebastian Foss sfo at ingenieurbuero-foss.de
Tue Aug 28 16:33:25 CEST 2018


ok seems the ddp profiles are persistent when unbinding and rebinding the dpdk / linux drivers. However it seems like the ddp profile is not used for rss hashing when i bind the i40e driver and run some test (e.g. PPPoE traffic).

Are there any plans to support ddp profiles for rss hashing when i40e is used without dpdk ?




Von: Rami Rosen <ramirose at gmail.com> 
Gesendet: Sonntag, 26. August 2018 22:46
An: Sebastian Foss <sfo at ingenieurbuero-foss.de>
Cc: dts at dpdk.org
Betreff: Re: [dts] DDP / testpmd setup


Hi, Sebastian,

Regarding rebinding, there are two types:

One is with 

dpdk-devbind -b i40e pci_id_of_port

And the second is the ribust one:

rmmod i40e and then modprobe i40e. I am not sure as to which of the two you aim when talking about rebinding.

I would suggest to start with the first option. It triggers calling the probe() callback of I40E, and not the full longer and heavier way with I40E module_exit() and module_init() callbacks


Regarding userspace app for achieving it: you can follow the dpdk testpmd code, but

this can take quite a time and effort.



Rami Rosen



בתאריך יום א׳, 26 באוג׳ 2018, 22:57, מאת Sebastian Foss ‏<sfo at ingenieurbuero-foss.de <mailto:sfo at ingenieurbuero-foss.de> >:

Hi Rami,

I found the switch for testpmd to use a cmd line script instead of using interactive mode. Still need to see if loading a ddp persists on the card when rebinding the i40e driver instead of vfio / uio.

The kernel i40e driver also seems to have the functions to use AdminQ to load DDPs onto the card – however im not sure how to do it from userland.



Von: Rami Rosen <ramirose at gmail.com <mailto:ramirose at gmail.com> > 
Gesendet: Sonntag, 26. August 2018 20:59
An: sfo at ingenieurbuero-foss.de <mailto:sfo at ingenieurbuero-foss.de> 
Betreff: Re: [dts] DDP / testpmd setup


Hi Sebastian,

I don't know of such a way, unfortunately. Also you cannot automate testpmd

as it is to load the profile automatically without going interactive mode.



Rami Rosen






On Sun, Aug 26, 2018 at 3:18 PM Sebastian Foss <sfo at ingenieurbuero-foss.de <mailto:sfo at ingenieurbuero-foss.de> > wrote:


we are using testpmd to store ddp profiles in an Intel X710DA2 NIC. Is there a way to have those profiles stored in the NIC permanently – or what would be the best solution to have those profiles loaded automatically at boot and use a regular kernel driver afterwards ? From what i understand so far to use the DPDK functions to load a DDP Profile the UIO or VFIO drivers have to be used.


Thank you!


Mit freundlichen Grüßen / Best Regards

Sebastian Foss, Electrical Engineering (B. Eng.)

Hardware & Software Development

Geschäftsführer / CEO

SF Engineering UG & Co. KG





Rami Rosen

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