c1a44fd2a6
Add README.md files for moeo/tutorial/Lesson{1-4}, smp/tutorial/Lesson{1-4},
and mo/tutorial/Lesson9 — these tutorials had no documentation.
Fix return 1 → return 0 in 28 tutorial main() functions across mo/ and
smp/ that unconditionally returned failure status.
31 lines
677 B
Markdown
31 lines
677 B
Markdown
# Dynamic island topology
|
|
|
|
Three islands start with a ring topology and switch to a complete topology
|
|
after 10 seconds of computation.
|
|
|
|
Same QAP problem as Lessons 1-2.
|
|
|
|
## Running
|
|
|
|
From the `build/smp/tutorial/Lesson4` directory:
|
|
|
|
```shell
|
|
./lesson4_topology
|
|
```
|
|
|
|
## How it works
|
|
|
|
A callback function registered with the islands triggers the topology
|
|
change:
|
|
|
|
```c++
|
|
void changeTopo(IslandModel<Indi>* _model, AbstractTopology& _topo)
|
|
{
|
|
// ... after 10 seconds:
|
|
_model->setTopology(_topo);
|
|
}
|
|
```
|
|
|
|
The topology can be changed at runtime via `model.setTopology()`, so you
|
|
can implement adaptive communication patterns based on time, convergence,
|
|
or any other criterion.
|