The loop terminates when process::still_running() returns false.
(read the source for full details...)
+
+Some notes about *load attributes
+=================================
+process::real_load Current *real* load.
+ Used for the computations.
+ Displayed in log messages.
+
+process::expected_load Current load estimation.
+ Used for load-balancing estimation, and for
+ diffusing to neighbors.
+ * Without bookkeeping, it equals real_load
+ minus pending sends.
+ * With bookkeeping, it corresponds to the
+ "virtual load".
+
+process::received_load Real load received from neighbors.
+ Used when receiveing data messages, and then
+ added to real_load.