[dpdk-users] ring vdev and secondary process

Tom Barbette barbette at kth.se
Wed Sep 5 13:19:51 CEST 2018


Hi Keith,

No it's not the problem. The ring is allocated by the primary. The secondary should just attach. Vdevs should be usable between multiple process from what I gathered.

Tom
________________________________________
De : Wiles, Keith <keith.wiles at intel.com>
Envoyé : lundi 3 septembre 2018 17:08
À : Tom Barbette
Cc : users at dpdk.org
Objet : Re: [dpdk-users] ring vdev and secondary process

> On Sep 3, 2018, at 3:40 PM, Tom Barbette <barbette at kth.se> wrote:
>
> Hi all,
>
>
> I'm trying to use virtual devices (ring-based PMD, but the underlying system does not matter) between two DPDK processes.
>
>
> But when I launch the secondary process, I get "RING: Cannot reserve memory". I modified the message to get the rte_errno, which is 17, File exists.  This also happens with testpmd.

Memory can not be allocated in the secondary process, but must request it from the primary. Is this the problem?

>
>
> I'm using DPDK 18.08. Using the ring API directly works without any problem. But I'd like to use the vdev one to build functional tests.
>
>
> I tried with the TAP pmd, the device is not available in the secondary process (rte_eth_dev_count_avail() is 0).
>
>
> Thanks,
>
> Tom

Regards,
Keith



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