Concurrent invocations of the dpdk-dumpcap tool

[Stephen Hemminger]

On Sun, 17 Sep 2023 00:11:31 +0300
Isaac Boukris <iboukris at gmail.com> wrote:

> I'm testing with the 22.11.3 version code (latest LTS) but there don't
> seem to be significant changes in master.
> 
> Given the above I had the hunch the ring names collide in shared
> memory, so I changed both the ring and the pool names in the dumpcap
> tool to include the pid, and with that the above scenario works fine
> as expected, is that a proper fix?

If you have two processes trying to capture on same interface it
isn't going to work because both will be fighting over the same
ring of packets. To make it work would require more extensive changes
where multiple copies of packet are made.