+This example demonstrates several kinds of parallel tasks: regular
+ones, communication-only (without computation), computation-only
+(without communication), synchronization-only (neither
+communication nor computation). It also shows how to reconfigure a
+task after its start, to change the number of hosts it runs onto.
+This allows simulating malleable tasks.
+
+.. tabs::
+
+ .. example-tab:: examples/cpp/exec-ptask/s4u-exec-ptask.cpp
+
+ See also :cpp:func:`simgrid::s4u::this_actor::parallel_execute()`.
+
+DVFS and pstates
+^^^^^^^^^^^^^^^^