[PATCH v7] app/testpmd: monitor state of primary process when using secondary

[Khadem Ullah]

Hi,
You can create a simple setup with only running testpmd with primary and
another testpmd with secondary and then see the results.

No, the reason for the primary process termination could be close or
shutdown (ctrl + c or ctrl + q) or any other.

The reason is clear: "In secondary processes, accessing
'dev->data->dev_private' or &dev->data->mac_addrs directly can
cause a segmentation fault if the primary process has exited or the
shared memory is unavailable."

The effect is throughput the life-cycle of secondary process existence in
dpdk after primary,
You can check
https://patches.dpdk.org/project/dpdk/patch/20250721073851.963141-1-14pwcse1224@uetpeshawar.edu.pk/
https://patches.dpdk.org/project/dpdk/patch/20250721105522.1019515-1-14pwcse1224@uetpeshawar.edu.pk/

I think most of the details have already been provided.
The community agrees with the current solution.

Thanks.
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