Multi-threading - Forks and Joins
The Model Simulator provides the ability to handle multi-threaded simulations using Fork and Join nodes.
| • | In the example below, the current execution point has forked into two threads, each with its own active node. |
| • | As this example progresses, the lower branch will wait at the Join node until the top branch has completed all its Actions. |
| • | Once the two threads merge back into one, the Simulation will continue as a single thread until completion. |
| • | When automatically stepping, each thread will be seen to execute a single step during one simulation "cycle" - although when single stepping or at a breakpoint, the behavior is to alternate step between threads as each thread receives processing time. |
| • | Note that the Call Stack window will show two active threads and one "paused" thread in the example below. Once the threads merge there will be a return to single threaded execution. |
| • | Also note that the Local variables are shared (global) between all threads. If you want to Simulate private variables on a thread you must create new Simulation variables at the start of each thread - pre-loading such variables with existing global data. |
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