Large interruptions for EAL thread running on isol core

[Antonio Di Bacco]

I'm running a DPDK thread on an isolated core. I also set some  flags
that could help keeping the core at rest on linux like: nosoftlockup
nohz_full rcu_nocbs irqaffinity.

Unfortunately the thread gets some interruptions that stop the thread
for about 20-30 micro seconds. This seems smal but my application
suffers a lot.

I also tried to use  rte_thread_set_priority that indeed has a strong
effect but unfortunately creates problems to Linux (like network not
working).

Is there any other knob that could help running the DPDK thread with
minimum or no interruptions at all?