Systems and an apparatus with a sideband interface interconnecting agents with at least one router

A system comprising:

• a system on chip (SoC) comprising:
• at least one core to execute instructions;
• a coherent interconnect coupled to the at least one core;
• a memory controller coupled to the coherent interconnect;
• a fabric coupled to the coherent interconnect;
• a plurality of agents coupled to the fabric;
• and
• a sideband message interface to interconnect the plurality of agents with at least one router, wherein at least one of the plurality of agents is to generate a request to obtain an aggregated response, the request including a predetermined port identifier reserved for issuance of aggregation requests;
• and
• a system memory coupled to the SoC.

An apparatus comprising:

• at least one core to execute instructions;
• a coherent interconnect coupled to the at least one core;
• a memory controller coupled to the coherent interconnect;
• a fabric coupled to the coherent interconnect;
• a plurality of agents coupled to the fabric;
• a sideband message interface to interconnect the plurality of agents with at least one router, wherein at least one of the plurality of agents is to generate a request to obtain an aggregated response, the request including a predetermined port identifier reserved for issuance of aggregation requests;
• and
• the at least one router including an aggregation logic, responsive to the request, to combine a plurality of responses from at least some of the plurality of agents into a combined response and send the combined response to the at least one of the plurality of agents.