-> N publisher nodes are generating performance counters either periodically or on-demand
-> M subscriber nodes register for receiving these counters
Subscribers can register to a subset of these counters or set the interval

Approach:
-> Bootstrap: launch n EvPath receivers with MPI and distribute the addresses to the tree nodes using MPI communication
-> Use a logical tree topology for aggregating statistics
-> Use trees with different number of children (e.g. 2, 4, 8, ...)
-> Use a different time stamp for each aggregation step
-> Implement statistics computations on the tree (MIN, MAX, AVG)