Re: [dpdk-dev] i40e and RSS woes

[Gleb Natapov <gleb@cloudius-systems.com>]

Ping.

On Thu, Feb 19, 2015 at 04:50:10PM +0200, Gleb Natapov wrote:
> CCing i40e driver author in a hope to get an answer.
> 
> On Mon, Feb 16, 2015 at 03:36:54PM +0200, Gleb Natapov wrote:
> > I have an application that works reasonably well with ixgbe driver, but
> > when I try to use it with i40e I encounter various RSS related issues.
> > 
> > First one is that for some reason i40e, when it builds default reta
> > table, round down number of queues to power of two. Why is this? If I
> > configure reta by my own using all of the queues everything seams to be
> > working. To add insult to injury I do not get any errors during
> > configuration some queues just do not receive any traffic.
> > 
> > The second problem is that for some reason i40e does not use 40 byte
> > toeplitz hash key like any other driver, but it expects the key to be 52
> > bytes. And it would have being fine (if we ignore the fact that it
> > contradicts MS spec), but how my high level code suppose to know that?
> > And again, device configuration does not fail when wrong key length is
> > provided, it just uses some other key. Guys this kind of error handling
> > is completely unacceptable.
> > 
> > The last one is more of a question. Why interface to change RSS hash
> > function (XOR or toeplitz) is part of a filter configuration and not rss
> > config?
> > 
> > --
> > 			Gleb.
> 
> --
> 			Gleb.

--
			Gleb.