Re: [dpdk-users] [dpdk-dev] Solarflare DPDK

Re: [dpdk-users] [dpdk-dev] Solarflare DPDK

[Ankit Aggarwal]

Hi Andrew

I'm developing a kit for kernel bypass purpose.OpenOnLoad already provides
a way to do kernel bypass.

Can dpdk also be used for kernel bypassing purpose on intel/solarflare
cards?

Ankit Aggarwal

On Tue, Mar 21, 2017 at 1:48 PM, Andrew Rybchenko <arybchenko@solarflare.com
> wrote:

> Hi Ankit,
>
> (May be users@dpdk.org is a better place for such questions)
>
> OpenOnload provides a user-level TCP/IP stack with POSIX interface –
> transparently runs any Linux sockets binary without requiring any changes
> to the application. "DPDK is a set of libraries and drivers for fast
> packet processing. [snip] DPDK is not a networking stack" (quotes from
> dpdk.org). So they have very different end use-cases.
>
> So if end-use case is performing packet processing and/or switching
> packets between network interfaces then DPDK allows an open API to be used.
> However, if app needs to terminate TCP or UDP flows then OpenOnload
> provides a mature TCP/IP stack. We’ve seen good results with applications
> such as Nginx with OpenOnload.
>
> Regards,
> Andrew.
>
>
> On 03/20/2017 05:22 PM, Ankit Aggarwal wrote:
>
> Hi DPDK Users/devs
>
> Can you please tell me the benefits of using DPDK over openonload for
> solarflare cards?
>
> Ankit Aggarwal
>
>
>

Re: [dpdk-users] [dpdk-dev] Solarflare DPDK

[Anupam Kapoor]

<elided: dev@dpdk.org, not pertinent>

,----[ ankit-agarwal ]
| Can dpdk also be used for kernel bypassing purpose on intel/solarflare
| cards?
`----
yes it can. but, in terms of functionality, you would need to
build/cobble together the complete stack yourself. which _might_ be
non-trivial.

another option ofcourse, is to go with commercial solutions (something
akin to OpenOnload) built with dpdk e.g. 6wind...

---
thanks
anupam

Re: [dpdk-users] [dpdk-dev] Solarflare DPDK

[Ankit Aggarwal]

Hi

"but, in terms of functionality"

Can you elaborate on that?

Ankit Aggarwal

On Tue, Mar 21, 2017 at 3:00 PM, Anupam Kapoor <anupam.kapoor@gmail.com>
wrote:

>
> <elided: dev@dpdk.org, not pertinent>
>
> ,----[ ankit-agarwal ]
> | Can dpdk also be used for kernel bypassing purpose on intel/solarflare
> | cards?
> `----
> yes it can. but, in terms of functionality, you would need to
> build/cobble together the complete stack yourself. which _might_ be
> non-trivial.
>
> another option ofcourse, is to go with commercial solutions (something
> akin to OpenOnload) built with dpdk e.g. 6wind...
>
> ---
> thanks
> anupam
>

Re: [dpdk-users] [dpdk-dev] Solarflare DPDK

[Anupam Kapoor]

,----[ ankit-agarwal ]
| "but, in terms of functionality"
|
| Can you elaborate on that?
`----
sure, think l2 handling sepcifically, arp, neighbor table management
etc. for l3 you need to manage routing etc. etc., from l4 onwards you
need to worry about protocol specific handling, and protocol states
which may or may not last application lifetimes etc. etc.

but, i am guessing, openload's offering is already battle-tested, and
provides sane sematics for stuff outlined above, both on virtualized,
and bare-metal environments.

or, as mentioned earlier, if you want to go with dpdk, then there are
commercial offerings available there as well.

--
kind regards
anupam

Re: [dpdk-users] [dpdk-dev] Solarflare DPDK

[Andrew Rybchenko]

On 03/21/2017 12:05 PM, Ankit Aggarwal wrote:
> I'm developing a kit for kernel bypass purpose.OpenOnLoad already 
> provides a way to do kernel bypass.
>
> Can dpdk also be used for kernel bypassing purpose on intel/solarflare 
> cards?

Yes, it can be used.

Onload works best on Solarflare cards but that there is experimental 
support for Onload on Intel cards.

Andrew.