Find application example that changes thread scheduler

[khuck]

We need an example where the default thread scheduler should be replaced with one that would have better performance. This assumes that we can change scheduler mid-stream, which may not be possible. Possibly UTS? Another algorithm that benefits from LIFO processing?

[khuck]

Executors in HPX-3 - possibly for power savings, switching different executors for a set of tasks. Each executor includes a scheduler. Could be used for separating NUMA domains. Very early days, only a crude implementation.