On Tue, 24 Aug 2021 20:03:03 +0000
Honnappa Nagarahalli [off-list ref] wrote:

quoted

One difference between this implementation and the previous one is this busy
loop. rte_pause() relaxes the cpu, but will not make the calling thread to sleep
and wait for the sync event. So here we can spin a quite long time until the
other thread is scheduled by the OS.  

Yes, this is a difference. We could add a microsleep to allow for the OS to un-schedule the current thread.

Why not use sched_yield() here?