These address space organizations have an associated communication mechanism . For DSM, shared memory can be used to communicate data via load and store operations. Bandwidth in and out of an individual processor is also important. It is affected by the architecture within the node and by the communication mechanism. With respect to the mechanism, when communication occurs, resources are tied up or occupied, preventing other communication.
Occupancy can limit the communication bandwidth.
Performance Metrics for Communication Mechanisms Communication latency. Lower is better of course. Sender and receiver overhead are determined by communication mechanism. Tying up processor resources. Performance Metrics for Communication Mechanisms Communication latency hiding.