.. _plugins:
SimGrid Plugins
###############
.. raw:: html
You can extend SimGrid without modifying it, thanks to our plugin
mechanism. This page describes how to write your own plugin, and
documents some of the plugins distributed with SimGrid:
- :ref:`Host Energy `: models the energy dissipation of the compute units.
- :ref:`Link Energy `: models the energy dissipation of the network.
- :ref:`Host Load `: monitors the load of the compute units.
You can activate these plugins with the :ref:`--cfg=plugin ` command
line option, for example with ``--cfg=plugin:host_energy``. You can get the full
list of existing plugins with ``--cfg=plugin:help``.
Defining a Plugin
*****************
A plugin can get some additional code executed within the SimGrid
kernel, and attach the data needed by that code to the SimGrid
objects.
The host load plugin in
`src/plugins/host_load.cpp `_
constitutes a good introductory example. It defines a class
```HostLoad``` that is meant to be attached to each host. This class
contains a ```EXTENSION_ID``` field that is mandatory to our extension
mechanism. Then, the function ```sg_host_load_plugin_init```
initializes the plugin. It first calls
:cpp:func:`simgrid::s4u::Host::extension_create()` to register its
extension to the ```s4u::Host``` objects, and then attaches some
callbacks to signals.
You can attach your own extension to most kinds of s4u object:
:cpp:class:`Actors `,
:cpp:class:`Disks `,
:cpp:class:`Hosts ` and
:cpp:class:`Links `. If you need to extend another
kind of objects, please let us now.
Partial list of existing signals in s4u:
- :cpp:member:`Actor::on_creation `
:cpp:member:`Actor::on_suspend `
:cpp:member:`Actor::on_resume `
:cpp:member:`Actor::on_sleep `
:cpp:member:`Actor::on_wake_up `
:cpp:member:`Actor::on_migration_start `
:cpp:member:`Actor::on_migration_end `
:cpp:member:`Actor::on_termination `
:cpp:member:`Actor::on_destruction `
- :cpp:member:`Comm::on_sender_start `
:cpp:member:`Comm::on_receiver_start `
:cpp:member:`Comm::on_completion `
- :cpp:member:`Engine::on_platform_creation `
:cpp:member:`Engine::on_platform_created `
:cpp:member:`Engine::on_time_advance `
:cpp:member:`Engine::on_simulation_end `
:cpp:member:`Engine::on_deadlock `
- :cpp:member:`Exec::on_start `
:cpp:member:`Exec::on_completion `
- :cpp:member:`Host::on_creation `
:cpp:member:`Host::on_destruction `
:cpp:member:`Host::on_state_change `
:cpp:member:`Host::on_speed_change `
- :cpp:member:`Link::on_creation `
:cpp:member:`Link::on_destruction `
:cpp:member:`Link::on_state_change `
:cpp:member:`Link::on_speed_change `
:cpp:member:`Link::on_communicate `
:cpp:member:`Link::on_communication_state_change `
- :cpp:member:`Netzone::on_creation `
:cpp:member:`Netzone::on_seal `
:cpp:member:`Netzone::on_route_creation `
- :cpp:member:`VirtualMachine::on_start `
:cpp:member:`VirtualMachine::on_started `
:cpp:member:`VirtualMachine::on_suspend `
:cpp:member:`VirtualMachine::on_resume `
:cpp:member:`VirtualMachine::on_migration_start `
:cpp:member:`VirtualMachine::on_migration_end `
Existing Plugins
****************
Only the major plugins are described here. Please check in src/plugins
to explore the other ones.
.. _plugin_host_energy:
Host Energy Plugin
==================
.. doxygengroup:: Plugin_host_energy
.. _plugin_link_energy:
Link Energy Plugin
==================
.. doxygengroup:: Plugin_link_energy
.. _plugin_host_load:
Host Load Plugin
================
.. doxygengroup:: Plugin_host_load
.. LocalWords: SimGrid