TLM - Four Main Timing Methodologies

How shall we relate to the SystemC kernel concept of time ?

  cout << ``Time now is : `` << simcontext()->time_stamp() << `` \n'';

How often must we re-enter the SystemC kernel ?

A coarse schedulling granularity gives high-speed simulation:

For example, when using an ISS, how many instructions to model per quantum ?

• Cycle Accurate: Every clock tick,
• Approximately Timed: Every TLM call and return,
• Loosely Timed: When we need a result from another component,
• Untimed: Free riding: The subsystem's load is ignored: OK if not on critical path.

Can mix them in one overall system model, but threads that pass through untimed components will appear faster than real life.