Mission-critical computing architecture

A method of manufacturing a central processing unit (CPU) device, the method, comprising:

• forming a processor core;
• forming a plurality of shared agents;
• forming flow control circuitry configured to receive operational requests from a the processor core, wherein the operational requests are to be processed by the shared agents to produce corresponding responses;
• forming request allocator circuitry coupled to the flow control circuitry and configured to duplicate a first request from among the operational requests to be redundantly processed independently and asynchronously by distinct ones of the shared agents to produce redundant counterpart responses including a first redundant response and a second redundant response;
• and
• forming response comparator circuitry coupled to the flow control circuitry and configured to compare the first redundant response against the second redundant response to produce a comparison result;
• wherein the flow control circuitry is configured such that:
• in response to the comparison result being indicative of a match between a first redundant response and the second redundant response, the flow control circuitry is to merge the first redundant response and the second redundant response to produce a single final response to the first request to be read by the processor core;
• and
• wherein in response to the comparison result being indicative of a non-match between the first redundant response and the second redundant response, the flow control circuitry is to perform an exception response.

A computer system having a fault-management architecture, the system, comprising:

• a processor core;
• memory and input/output facilities communicatively coupled to the core via shared agents;
• flow control circuitry to receive operational requests from the core, wherein the operational requests are to be processed by the shared agents to produce corresponding responses;
• request allocator circuitry coupled to the flow control circuitry and to duplicate a first request from among the operational requests to be redundantly processed independently and asynchronously by distinct ones of the shared agents to produce redundant counterpart responses including a first redundant response and a second redundant response;
• and
• response comparator circuitry coupled to the flow control circuitry and to compare the first redundant response against the second redundant response to produce a comparison result;
• wherein in response to the comparison result being indicative of a match between a first redundant response and the second redundant response, the flow control circuitry is to merge the first redundant response and the second redundant response to produce a single final response to the first request to be read by the core;
• and
• wherein in response to the comparison result being indicative of a non-match between the first redundant response and the second redundant response, the flow control circuitry is to perform an exception response.