Systems and methods for partitioning session initial protocol (SIP) processing among execution units are disclosed. An exemplary device comprises: a plurality of execution units and a plurality of session initiation protocol (SIP) processes. The SIP processes comprise: a SIP transport process; a SIP location server process; and a plurality of SIP core processes. The SIP transport process executes on a first one of the execution units. The SIP location server executes on a second one of the execution units. Each of the SIP core processes executes on a different remaining one of the execution units. An exemplary method comprises: executing a SIP transport process on a first one of the execution units; executing a SIP location server on a second one of the execution units, and executing each of the SIP core processes on a different remaining one of the execution units.
