Re: [dpdk-dev] PMD for Cisco VIC Ethernet NIC - Request for guidelines for submission

[Hobywan Kenoby <hobywank@hotmail.com>]

Hi Sujith,

It makes sens, using VFIO makes a far cleaner implementation. 
You worked on the performance, could you share some measurements ? Did you introduce vectorization functions as Intel did a while ago? There are allways tradeoffs between pps and latency, do you include documentation to configure the card for one or the other?
HK
From: ssujith@cisco.com
To: hobywank@hotmail.com; dev@dpdk.org
Subject: Re: [dpdk-dev] PMD for Cisco VIC Ethernet NIC - Request for guidelines for submission
Date: Fri, 11 Jul 2014 07:46:08 +0000






Hi Hobywan,
Thanks for the email !



We’ve been working on performance benchmarking.  Also, we felt that it would be better to push the driver after Anatoly’s patch (vfio-pci) got in so that we could make the necessary modification before submission.  
Now that 1.7.0 is out, we are hopeful of submitting the patch soon.



Thanks,
-Sujith





From: Hobywan Kenoby <hobywank@hotmail.com>

Date: Thursday, 10 July 2014 1:37 am

To: "Sujith Sankar (ssujith)" <ssujith@cisco.com>, "dev@dpdk.org" <dev@dpdk.org>

Subject: RE: [dpdk-dev] PMD for Cisco VIC Ethernet NIC - Request for guidelines for submission







Hi Sujith,



It was exciting to see open source code coming from Cisco ensuring a DPDK application can run on any platform and with any card....
I haven't seen your patch yet. What happened?



HK

 
 
> Date : Wed, 28 May 2014 08:06
> From : dev [mailto:dev-bounces@dpdk.org] 
> To :
dev@dpdk.org
> Subject : [dpdk-dev] PMD for Cisco VIC Ethernet NIC - Request for guidelines
> for submission
> 
> 
> Hi all,
> 
> We have been working on development of poll-mode driver for Cisco VIC
> Ethernet NIC and integration of it with DPDK.  We would like to submit this
> poll-mode driver (ENIC PMD) to the DPDK community so that it could be part
> of the DPDK tree.
> 
> Could someone please provide the guidelines and steps to do this?  As of
> now, ENIC PMD is being tested with DPDK 1.6.0r2.  Is it alright to submit a
> patch for DPDK 1.6.0r2?
> 
> One aspect of ENIC PMD is that it works with VFIO-PCI and not UIO.  Hope
> this is acceptable.  The following thread in dpdk-dev influenced this
> decision.
> 
http://dpdk.org/ml/archives/dev/2013-July/000373.html
> 
> ENIC PMD uses one interrupt per interface and it is used by the NIC for
> signalling the driver in case of any error.  Since this does not come in
> the fast path, it should be acceptable, isn¹t it?
> 
> Please give your suggestions and comments.
> 
> Thanks,
> -Sujith