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

Sujith Sankar (ssujith) ssujith at cisco.com
Mon Jul 21 05:39:22 CEST 2014


Hi Hobywan,

We’re still working on benchmarking, and would share the numbers once we are done with it.
Could you please elaborate on vectorisation functions?

Thanks,
-Sujith

From: Hobywan Kenoby <hobywank at hotmail.com<mailto:hobywank at hotmail.com>>
Date: Friday, 11 July 2014 6:46 pm
To: "Sujith Sankar (ssujith)" <ssujith at cisco.com<mailto:ssujith at cisco.com>>, "dev at dpdk.org<mailto:dev at dpdk.org>" <dev at dpdk.org<mailto:dev at dpdk.org>>
Subject: RE: [dpdk-dev] PMD for Cisco VIC Ethernet NIC - Request for guidelines for submission

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 at cisco.com<mailto:ssujith at cisco.com>
To: hobywank at hotmail.com<mailto:hobywank at hotmail.com>; dev at dpdk.org<mailto:dev at 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 at hotmail.com<mailto:hobywank at hotmail.com>>
Date: Thursday, 10 July 2014 1:37 am
To: "Sujith Sankar (ssujith)" <ssujith at cisco.com<mailto:ssujith at cisco.com>>, "dev at dpdk.org<mailto:dev at dpdk.org>" <dev at dpdk.org<mailto:dev at 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 at dpdk.org]

> To : dev at dpdk.org<mailto:dev at 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



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