[dpdk-users] ring vdev and secondary process

[Wiles, Keith]

> 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