RequestProducers are simple C++ classes that implement the RequestProducer interface. Upon calling the nextRequest() method of a producer, a new Request is either generated on-the-fly or constructed from a trace file.

RequestIssuers are the SystemC modules that connect to DRAMSys. Issuers have no knowledge of where the requests are coming from. They simply call their nextRequest() callback that it has been passed in the constructor to obtain the next request to be sent to DRAMSys. Using this concept, the generation and the issuing of request is completely decoupled to make very flexible initiator designs possible.

Initiators implement the Initiator interface, which describes how the initiator is bound to DRAMSys. This abstracts over the actual socket type used by the initiator. Complex initiators may implement the interface directly, but for simple cases, there exists the templated SimpleInitiator<Producer> class. This specialized initiator consists of only one producer and one issuer that operate together. The StlPlayer and RowHammer issuers make use of the SimpleInitiator. The TrafficGenerator is one example of a direct implementation of the Initiator interface, as it consists of many producers (which represent the states of the state machine) but of only one issuer.

Requests are an abstraction over the TLM payloads the issuer generates. A request describes whether it is a read or a write access or an internal Stop request that tells the initiator to terminate. The delay field specifies the time that should pass between the issuance of the previous and the current request.

Configuration

A detailed description on how to configure the traffic generators of the simulator can be found here.