From mboxrd@z Thu Jan  1 00:00:00 1970
From: Navneet Rao <navneet.rao@oracle.com>
Subject: Re: Running testpmd over KNI
Date: Fri, 5 Jun 2015 10:20:09 -0700 (PDT)
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To: Bruce Richardson <bruce.richardson@intel.com>
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Hi Bruce:

Actually I want to use the TESTPMD app as a packet-generator/checker drivin=
g the KNI-enabled NICs.
Is there an easy way to packet generate/check than testpmd?

Please see attached.

Thanks
-Navneet




-----Original Message-----
From: Bruce Richardson [mailto:bruce.richardson@intel.com]
Sent: Friday, June 05, 2015 3:24 AM
To: Navneet Rao
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] Running testpmd over KNI

On Thu, Jun 04, 2015 at 02:01:19PM -0700, Navneet Rao wrote:
> Running ---
>=20
> =20
>=20
> ./testpmd -c7 -n3 --vdev=3Deth_pcap0,iface=3DvEth0
> --vdev=3Deth_pcap1,iface=3DvEth1 -- -i --nb-cores=3D2 --nb-ports=3D2
> --total-num-mbufs=3D1024
>=20
> =20
>=20
> results in a
>=20
> =20
>=20
> EAL: Error - exiting with code: 1
>=20
>   Cause: Cannot create lock on '/var/run/.rte_config'. Is another primary=
 process running?
>=20
> =20
>=20
> =20
>=20
> I don't think I am running another process using testpmd!!!
>=20
> Any ideas to debug this?
>=20
> =20
>=20
> Thanks
>=20
> -Navneet

Hi Navneet,

I'm a little unclear on your setup here. You are using a DPDK process to pu=
ll packets from a physical NIC and send them to the kernel using KNI. Then =
you want to have testpmd pull those packets from the KNI device using pcap =
back into user- space before returning them via the same sort of path i.e. =
userspace, pcap to kernel, kni back to userspace and out again. Can you exp=
lain why you want such a setup, as it will work very slowly compared to jus=
t running everything directly in userspace?

As for your specific issue. If you have a DPDK process running to manage th=
e KNI device, that is the process holding the lock on .rte_config. You will=
 need to run the second process with a different file-prefix parameter to h=
ave two DPDK processes running side-by-side.

Regards,
/Bruce