[PATCH v5 v5 2/3] app: add topology aware test case

[Sudheendra Sampath]

Hi Vipin,

This is my first ever patch review with DPDK.  Apologies if I am not
following the right procedure.  I welcome any feedback or help in
correcting the procedure.

However, I had the following review related to the above patch.

I see that changes to app/test/test_ring_perf.c introduced the
following functions:

get_same_numa_domains(struct lcore_pair *lcp)
get_same_l4_domains(struct lcore_pair *lcp)
get_same_l3_domains(struct lcore_pair *lcp)
get_same_l2_domains(struct lcore_pair *lcp)
get_same_l1_domains(struct lcore_pair *lcp)
get_two_numa_domains(struct lcore_pair *lcp)
get_two_l4_domains(struct lcore_pair *lcp)
get_two_l3_domains(struct lcore_pair *lcp)
get_two_l2_domains(struct lcore_pair *lcp)
get_two_l1_domains(struct lcore_pair *lcp)

In the implementation of these, most of the code is pretty much
identical, except for the topology domain type.

Curious to know if it is better to implement a 'common function' -
get_topo_domains(struct lcore_pair *, topology_domain) - as arguments
and call get_topo_domains() from all of the above functions.  

For example: 
get_same_numa_domains() calls get_topo_domains(lp,
RTE_TOPO_DOMAIN_NUMA)

This will make it more cleaner and will help changes isolated to one
place if there are 'common' issues.

Appreciate if you can let me know if my thinking aligns with the
correct implementation.

Thanks and best regards,

Sudheendra G Sampath