How can I make DPDK timers work really asynchronously?

Question

DPDK timers are declared as asynchronous in doc. But in this example we have LCORE-workers (per CPU core) which need to check timer status in busy loop synchronously (calling rte_timer_manage() for some reason)

Is there a way to handle timer (run callback function) really asynchronously? E.g. rte_reset() timer in LCORE and then handle it inside control thread asynchronously on another CPU core (by signal, interrupt or whatever?)

Answer 1

Is there a way to handle timer (run callback function) really asynchronously?

Short answer - nope.
DPDK timers are asynchronous only in the sense that they will fire at a time given by the rte_timer_reset() function, but not at a guaranteed point while code execution. So from the code handling point of view they are synchronous because callbacks can only be executed at specific points in your code - rte_timer_manage() calls.