make DEBUG=[0 or 1] V=[1 or 2]
V1 => shows usage of pipes between two threads on differents cores (preferably isolated) : communication loops use all core's ressources but doesn't bother
V2 => shows usage of pipes between two threads on same (or not managed) core : communication loops needs to be interrupted (thread yield) to acheive each message passthrough
V3 => shows integration of (even not actor model) other systems with simplx through thoses pipes