* Most of them are created with :cpp:func:`simgrid::s4u::this_actor::exec_init()` or
* :cpp:func:`simgrid::s4u::Host::execute()`, and represent a classical (sequential) execution. This can be used to
* simulate some computation occurring in another thread when the calling actor is not blocked during the execution.
* Most of them are created with :cpp:func:`simgrid::s4u::this_actor::exec_init()` or
* :cpp:func:`simgrid::s4u::Host::execute()`, and represent a classical (sequential) execution. This can be used to
* simulate some computation occurring in another thread when the calling actor is not blocked during the execution.