* [dpdk-dev] Sharing NIC port between Linux and DPDK
@ 2015-01-19 6:22 Deepak Sehrawat
2015-01-19 6:37 ` Zhou, Danny
0 siblings, 1 reply; 2+ messages in thread
From: Deepak Sehrawat @ 2015-01-19 6:22 UTC (permalink / raw)
To: dev
Hi All,
What are the various means available (as of now) to share a NIC port
between Linux and DPDK applications? Idea is to separate control packets
and data packets; using Linux userspace application to process control
packets while DPDK application to access/process data packets (same NIC
port is carrying both of these packet traffics; control as well as data).
Note: Bifurcated driver is next step but it's not available as of now.
Thanks,
Deepak
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [dpdk-dev] Sharing NIC port between Linux and DPDK
2015-01-19 6:22 [dpdk-dev] Sharing NIC port between Linux and DPDK Deepak Sehrawat
@ 2015-01-19 6:37 ` Zhou, Danny
0 siblings, 0 replies; 2+ messages in thread
From: Zhou, Danny @ 2015-01-19 6:37 UTC (permalink / raw)
To: Deepak Sehrawat, dev
DPDK KNI(Kernel NIC interface) is your only option before bifurcated driver is adopted.
Basically, DPDK rx/tx all packets and do flow classification (e.g. 5-tuple based) in user
space then distribute control plane packets to KNI netdev in kernel space via
lockless queue based ring. The KNI netdev registers to kernel TCP/IP stack and
push control plane packets all the way up to the Linux user space control plane
applications.
If you have user space TCP/IP stacks and requires very high control plane performance,
you might take a short path by distributing control plane packets to your applications
directly. The reason we have KNI is that it could leverage mature enough TCP/IP stacks,
at the cost of CPU cycles.
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Deepak Sehrawat
> Sent: Monday, January 19, 2015 2:23 PM
> To: dev@dpdk.org
> Subject: [dpdk-dev] Sharing NIC port between Linux and DPDK
>
> Hi All,
>
> What are the various means available (as of now) to share a NIC port
> between Linux and DPDK applications? Idea is to separate control packets
> and data packets; using Linux userspace application to process control
> packets while DPDK application to access/process data packets (same NIC
> port is carrying both of these packet traffics; control as well as data).
>
> Note: Bifurcated driver is next step but it's not available as of now.
>
>
> Thanks,
> Deepak
^ permalink raw reply [flat|nested] 2+ messages in thread
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