OPASim is an OPA simulator for high-performance interconnections. OmniPath (OPA) is the Intel proposal for future high-performance interconnections. OPA should compete with InfiniBand or other proposals to win the race on the high-performance interconnect for future exascale systems.

In OPASim, the main features of OPA have been modeled. In this technical report the main characteristics of this proposal are studied and a preliminary evaluation is performed.