Thread management

• A thread is a virtual processor with Heap allocated TSO (Thread State Object with slots for registers) which has pointers to heap allocated SO (Stack Object). As the SO grows more SOs are added and chained to the latest SO.
• Each PE has a pool of runnable threads (TSOs): runnable pool.
• Once a thread has been started on a PE, it cannot be moved to another PE. A thread runs non-preemptively until it completes, or space runs out, or it blocks (accessing remote data, or waiting for result of another thread). This reduces space usages and run-time.