[dpdk-dev] i40e: Steps and required configurations of how to achieve the best performance!

[Zhang, Helin]

Hi David

It seems we just have minor progress, we have a script which is using setpci to do that.
  [dpdk-dev] scripts: enable extended tag of PCIe (http://www.dpdk.org/dev/patchwork/patch/2762/)

Yes, Stephen's patch could be the direction we need to follow up. Thanks for your indicating that!

Regards,
Helin


From: David Marchand [mailto:david.marchand at 6wind.com] 
Sent: Monday, February 9, 2015 8:12 PM
To: Zhang, Helin
Cc: Thomas Monjalon; dev at dpdk.org
Subject: Re: [dpdk-dev] i40e: Steps and required configurations of how to achieve the best performance!

Hello Helin, 

On Thu, Oct 16, 2014 at 2:43 AM, Zhang, Helin <helin.zhang at intel.com> wrote:
Hi Thomas
 
Yes, your proposal it the perfect one, also the most complicated one. I was thinking of that one as well, but we did not have enough time for that in our 1.8 timeframe.
In the long run, I agree with you to implement EAL function to access PCI config space directly. I will try to put it in our plan as soon as possible, if no objections.
 
For now, I think the quickest and easiest way might be to write out a script of using ‘setpci’, the Linux command. It is harmless for our code base, and we can remove it when we have better choice. What do you think?
 
Thank you very much for the great comments on this topic! I really like it!

Did you make any progress on this ?
Actually, looking at Stephen patches (http://dpdk.org/dev/patchwork/patch/3024/), I think we could go with this approach once both uio and vfio are fine.


-- 
David Marchand