.. This file follows the ReStructured syntax to be included in the
.. documentation, but it should remain readable directly.
+.. _s4u_examples:
Examples
********
SimGrid comes with an extensive set of examples, documented on this
page. Most of them only demonstrate one single feature, with some
-larger examplars listed below.
+larger exemplars listed below.
-The C++ examples can be found under examples/s4u while python examples
+The C++ examples can be found under examples/cpp while python examples
are in examples/python. Each such directory contains the source code (also listed
from this page), and the so-called tesh file containing how to call
the binary obtained by compiling this example and also the expected
Actors: the Active Entities
===========================
-Starting and Stoping Actors
----------------------------
+Starting and Stopping Actors
+----------------------------
- **Creating actors:**
- Most actors are started from the deployment XML file, because this
- is a :ref:`better scientific habbit <howto_science>`, but you can
+ Most actors are started from the deployment XML file because this
+ is a :ref:`better scientific habit <howto_science>`, but you can
also create them directly from your code.
.. tabs::
- .. example-tab:: examples/s4u/actor-create/s4u-actor-create.cpp
+ .. example-tab:: examples/cpp/actor-create/s4u-actor-create.cpp
You create actors either:
You create actors either:
- - Directly with :cpp:func:`sg_actor_create()` followed by :cpp:func:`sg_actor_start`.
+ - Directly with :cpp:func:`sg_actor_create` followed by :cpp:func:`sg_actor_start`.
- From XML with :cpp:func:`simgrid_register_function` and then :cpp:func:`simgrid_load_deployment`.
.. example-tab:: examples/python/actor-create/actor-create_d.xml
The following file is used in both C++ and Python.
- **React to the end of actors:** You can attach callbacks to the end of
- actors. There is several ways of doing so, depending on whether you want to
+ actors. There are several ways of doing so, depending on whether you want to
attach your callback to a given actor and on how you define the end of a
- given actor. User code probably want to react to the termination of an actor
+ given actor. User code probably wants to react to the termination of an actor
while some plugins want to react to the destruction (memory collection) of
actors.
.. tabs::
- .. example-tab:: examples/s4u/actor-exiting/s4u-actor-exiting.cpp
+ .. example-tab:: examples/cpp/actor-exiting/s4u-actor-exiting.cpp
This example shows how to attach a callback to:
- - the end of a specific actor: :cpp:func:`simgrid::s4u::this_actor::on_exit()`
+ - the end of a specific actor: :cpp:func:`simgrid::s4u::Actor::on_exit()`
- the end of any actor: :cpp:member:`simgrid::s4u::Actor::on_termination()`
- the destruction of any actor: :cpp:member:`simgrid::s4u::Actor::on_destruction()`
.. tabs::
- .. example-tab:: examples/s4u/actor-kill/s4u-actor-kill.cpp
+ .. example-tab:: examples/cpp/actor-kill/s4u-actor-kill.cpp
See also :cpp:func:`void simgrid::s4u::Actor::kill(void)`, :cpp:func:`void simgrid::s4u::Actor::kill_all()`,
- :cpp:func:`simgrid::s4u::this_actor::exit`, :cpp:func:`simgrid::s4u::this_actor::on_exit`.
+ :cpp:func:`simgrid::s4u::this_actor::exit`, :cpp:func:`simgrid::s4u::Actor::on_exit`.
.. example-tab:: examples/python/actor-kill/actor-kill.py
See also :cpp:func:`sg_actor_kill`, :cpp:func:`sg_actor_kill_all`, :cpp:func:`sg_actor_exit`, :cpp:func:`sg_actor_on_exit`.
- - **Controling the actor life cycle from the XML:**
+ - **Controlling the actor life cycle from the XML:**
You can specify a start time and a kill time in the deployment file.
.. tabs::
- .. example-tab:: examples/s4u/actor-lifetime/s4u-actor-lifetime.cpp
+ .. example-tab:: examples/cpp/actor-lifetime/s4u-actor-lifetime.cpp
This file is not really interesting: the important matter is in the XML file.
- .. example-tab:: examples/s4u/actor-lifetime/s4u-actor-lifetime_d.xml
+ .. example-tab:: examples/cpp/actor-lifetime/s4u-actor-lifetime_d.xml
This demonstrates the ``start_time`` and ``kill_time`` attribute of the :ref:`pf_tag_actor` tag.
+ .. example-tab:: examples/python/actor-lifetime/actor-lifetime.py
+
+ This file is not really interesting: the important matter is in the XML file.
+
.. example-tab:: examples/c/actor-lifetime/actor-lifetime.c
This file is not really interesting: the important matter is in the XML file.
- **Daemonize actors:**
- Some actors may be intended to simulate daemons that run in background. This example show how to transform a regular
+ Some actors may be intended to simulate daemons that run in the background.
+ This example shows how to transform a regular
actor into a daemon that will be automatically killed once the simulation is over.
.. tabs::
- .. example-tab:: examples/s4u/actor-daemon/s4u-actor-daemon.cpp
+ .. example-tab:: examples/cpp/actor-daemon/s4u-actor-daemon.cpp
See also :cpp:func:`simgrid::s4u::Actor::daemonize()` and :cpp:func:`simgrid::s4u::Actor::is_daemon()`.
- **Specify the stack size to use**
The stack size can be specified by default on the command line,
- globally by changing the configuration with :cpp:func:`simgrid::s4u::Engine::set_config(std::string)`,
+ globally by changing the configuration with :cpp:func:`simgrid::s4u::Engine::set_config`,
or for a specific actor using :cpp:func:`simgrid::s4u::Actor::set_stacksize` before its start.
.. tabs::
- .. example-tab:: examples/s4u/actor-stacksize/s4u-actor-stacksize.cpp
+ .. example-tab:: examples/cpp/actor-stacksize/s4u-actor-stacksize.cpp
.. example-tab:: examples/c/actor-stacksize/actor-stacksize.c
.. tabs::
- .. example-tab:: examples/s4u/actor-suspend/s4u-actor-suspend.cpp
+ .. example-tab:: examples/cpp/actor-suspend/s4u-actor-suspend.cpp
See also :cpp:func:`simgrid::s4u::this_actor::suspend()`,
:cpp:func:`simgrid::s4u::Actor::suspend()`, :cpp:func:`simgrid::s4u::Actor::resume()`, and
:cpp:func:`sg_actor_is_suspended()`.
- **Migrating Actors:**
- Actors can move or be moved from a host to another very easily. It amount to setting them on a new host.
+ Actors can move or be moved from a host to another very easily. It amounts to setting them on a new host.
.. tabs::
- .. example-tab:: examples/s4u/actor-migrate/s4u-actor-migrate.cpp
+ .. example-tab:: examples/cpp/actor-migrate/s4u-actor-migrate.cpp
See also :cpp:func:`simgrid::s4u::this_actor::set_host()` and :cpp:func:`simgrid::s4u::Actor::set_host()`.
.. tabs::
- .. example-tab:: examples/s4u/actor-join/s4u-actor-join.cpp
+ .. example-tab:: examples/cpp/actor-join/s4u-actor-join.cpp
See also :cpp:func:`simgrid::s4u::Actor::join()`.
.. tabs::
- .. example-tab:: examples/s4u/actor-yield/s4u-actor-yield.cpp
+ .. example-tab:: examples/cpp/actor-yield/s4u-actor-yield.cpp
See also :cpp:func:`simgrid::s4u::this_actor::yield()`.
---------------------------
This section details how to run trace-driven simulations. It is very
-handy when you want to test an algorithm or protocol that only react
+handy when you want to test an algorithm or protocol that only reacts
to external events. For example, many P2P protocols react to user
requests, but do nothing if there is no such event.
.. tabs::
- .. example-tab:: examples/s4u/replay-comm/s4u-replay-comm.cpp
+ .. example-tab:: examples/cpp/replay-comm/s4u-replay-comm.cpp
- **I/O replay:**
Presents a set of event handlers reproducing classical I/O
.. tabs::
- .. example-tab:: examples/s4u/replay-io/s4u-replay-io.cpp
+ .. example-tab:: examples/cpp/replay-io/s4u-replay-io.cpp
==========================
Activities: what Actors do
Communications on the Network
-----------------------------
+ - **Basic communications:**
+ This simple example just sends one message back and forth.
+ The tesh file laying in the directory shows how to start the simulator binary, highlighting how to pass options to
+ the simulators (as detailed in Section :ref:`options`).
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/comm-pingpong/s4u-comm-pingpong.cpp
+
+ .. example-tab:: examples/c/comm-pingpong/comm-pingpong.c
+
+
- **Basic asynchronous communications:**
Illustrates how to have non-blocking communications, that are
communications running in the background leaving the process free
.. tabs::
- .. example-tab:: examples/s4u/async-wait/s4u-async-wait.cpp
+ .. example-tab:: examples/cpp/comm-wait/s4u-comm-wait.cpp
See also :cpp:func:`simgrid::s4u::Mailbox::put_async()` and :cpp:func:`simgrid::s4u::Comm::wait()`.
- .. example-tab:: examples/python/async-wait/async-wait.py
+ .. example-tab:: examples/python/comm-wait/comm-wait.py
See also :py:func:`simgrid.Mailbox.put_async()` and :py:func:`simgrid.Comm.wait()`.
- .. example-tab:: examples/c/async-wait/async-wait.c
+ .. example-tab:: examples/c/comm-wait/comm-wait.c
+
+ See also :cpp:func:`sg_mailbox_put_async()` and :cpp:func:`sg_comm_wait()`.
+
+ - **Waiting for communications with timeouts:**
+ This example is very similar to the previous one, simply adding how to declare timeouts when waiting on asynchronous communication.
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/comm-waituntil/s4u-comm-waituntil.cpp
- See also :cpp:func:`sg_mailbox_put_async()` and :cpp:func:`sg_comm__wait()`.
+ See also :cpp:func:`simgrid::s4u::Activity::wait_until()` and :cpp:func:`simgrid::s4u::Comm::wait_for()`.
+ - **Suspending communications:**
+ The ``suspend()`` and ``resume()`` functions allow to block the
+ progression of a given communication for a while and then unblock it.
+ ``is_suspended()`` can be used to retrieve whether the activity is
+ currently blocked or not.
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/comm-suspend/s4u-comm-suspend.cpp
+
+ See also :cpp:func:`simgrid::s4u::Activity::suspend()`
+ :cpp:func:`simgrid::s4u::Activity::resume()` and
+ :cpp:func:`simgrid::s4u::Activity::is_suspended()`.
+
+
- **Waiting for all communications in a set:**
The ``wait_all()`` function is useful when you want to block until
- all activities in a given set have completed.
+ all activities in a given set have been completed.
.. tabs::
- .. example-tab:: examples/s4u/async-waitall/s4u-async-waitall.cpp
+ .. example-tab:: examples/cpp/comm-waitall/s4u-comm-waitall.cpp
See also :cpp:func:`simgrid::s4u::Comm::wait_all()`.
- .. example-tab:: examples/python/async-waitall/async-waitall.py
+ .. example-tab:: examples/python/comm-waitall/comm-waitall.py
See also :py:func:`simgrid.Comm.wait_all()`.
- .. example-tab:: examples/c/async-waitall/async-waitall.c
+ .. example-tab:: examples/c/comm-waitall/comm-waitall.c
See also :cpp:func:`sg_comm_wait_all()`.
.. tabs::
- .. example-tab:: examples/s4u/async-waitany/s4u-async-waitany.cpp
+ .. example-tab:: examples/cpp/comm-waitany/s4u-comm-waitany.cpp
See also :cpp:func:`simgrid::s4u::Comm::wait_any()`.
- .. example-tab:: examples/python/async-waitany/async-waitany.py
+ .. example-tab:: examples/python/comm-waitany/comm-waitany.py
See also :py:func:`simgrid.Comm.wait_any()`.
- .. example-tab:: examples/c/async-waitany/async-waitany.c
+ .. example-tab:: examples/c/comm-waitany/comm-waitany.c
See also :cpp:func:`sg_comm_wait_any`.
- **Basic execution:**
The computations done in your program are not reported to the
- simulated world, unless you explicitly request the simulator to pause
+ simulated world unless you explicitly request the simulator to pause
the actor until a given amount of flops gets computed on its simulated
- host. Some executions can be given an higher priority so that they
+ host. Some executions can be given a higher priority so that they
get more resources.
.. tabs::
- .. example-tab:: examples/s4u/exec-basic/s4u-exec-basic.cpp
+ .. example-tab:: examples/cpp/exec-basic/s4u-exec-basic.cpp
See also :cpp:func:`void simgrid::s4u::this_actor::execute(double)`
and :cpp:func:`void simgrid::s4u::this_actor::execute(double, double)`.
.. tabs::
- .. example-tab:: examples/s4u/exec-async/s4u-exec-async.cpp
+ .. example-tab:: examples/cpp/exec-async/s4u-exec-async.cpp
See also :cpp:func:`simgrid::s4u::this_actor::exec_init()`,
:cpp:func:`simgrid::s4u::Activity::start()`,
.. tabs::
- .. example-tab:: examples/s4u/exec-remote/s4u-exec-remote.cpp
+ .. example-tab:: examples/cpp/exec-remote/s4u-exec-remote.cpp
See also :cpp:func:`simgrid::s4u::Exec::set_host()`.
computational kernels that span over several machines, such as a
PDGEM and the other ScaLAPACK routines. Note that this only works
with the "ptask_L07" host model (``--cfg=host/model:ptask_L07``).
+
+ 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/s4u/exec-ptask/s4u-exec-ptask.cpp
+ .. example-tab:: examples/cpp/exec-ptask/s4u-exec-ptask.cpp
See also :cpp:func:`simgrid::s4u::this_actor::parallel_execute()`.
- **Using Pstates on a host:**
- This example shows how define a set of pstates in the XML. The current pstate
- of an host can then be accessed and changed from the program.
+ This example shows how to define a set of pstates in the XML. The current pstate
+ of a host can then be accessed and changed from the program.
.. tabs::
- .. example-tab:: examples/s4u/exec-dvfs/s4u-exec-dvfs.cpp
+ .. example-tab:: examples/cpp/exec-dvfs/s4u-exec-dvfs.cpp
See also :cpp:func:`simgrid::s4u::Host::get_pstate_speed` and :cpp:func:`simgrid::s4u::Host::set_pstate`.
.. tabs::
- .. example-tab:: examples/s4u/io-disk-raw/s4u-io-disk-raw.cpp
+ .. example-tab:: examples/cpp/io-disk-raw/s4u-io-disk-raw.cpp
.. example-tab:: examples/c/io-disk-raw/io-disk-raw.c
This shows how to declare disks in XML.
The FileSystem plugin provides a more detailed view, with the
-classical operations over files: open, move, unlink, and of course
+classical operations over files: open, move, unlink, and of course,
read and write. The file and disk sizes are also dealt with and can
-result in short reads and short write, as in reality.
+result in short reads and short writes, as in reality.
- **File Management:**
This example illustrates the use of operations on files
.. tabs::
- .. example-tab:: examples/s4u/io-file-system/s4u-io-file-system.cpp
+ .. example-tab:: examples/cpp/io-file-system/s4u-io-file-system.cpp
- **Remote I/O:**
- I/O operations on files can also be done in a remote fashion,
+ I/O operations on files can also be done remotely,
i.e. when the accessed disk is not mounted on the caller's host.
.. tabs::
- .. example-tab:: examples/s4u/io-file-remote/s4u-io-file-remote.cpp
+ .. example-tab:: examples/cpp/io-file-remote/s4u-io-file-remote.cpp
.. example-tab:: examples/c/io-file-remote/io-file-remote.c
.. tabs::
- .. example-tab:: examples/s4u/synchro-barrier/s4u-synchro-barrier.cpp
+ .. example-tab:: examples/cpp/synchro-barrier/s4u-synchro-barrier.cpp
- - **Condition variable:**
+ - **Condition variable: basic usage**
Shows how to use :cpp:type:`simgrid::s4u::ConditionVariable` synchronization objects.
.. tabs::
- .. example-tab:: examples/s4u/synchro-condition-variable/s4u-synchro-condition-variable.cpp
+ .. example-tab:: examples/cpp/synchro-condition-variable/s4u-synchro-condition-variable.cpp
+
+ - **Condition variable: timeouts**
+ Shows how to specify timeouts when blocking on condition variables.
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/synchro-condition-variable-waituntil/s4u-synchro-condition-variable-waituntil.cpp
- **Mutex:**
Shows how to use :cpp:type:`simgrid::s4u::Mutex` synchronization objects.
.. tabs::
- .. example-tab:: examples/s4u/synchro-mutex/s4u-synchro-mutex.cpp
+ .. example-tab:: examples/cpp/synchro-mutex/s4u-synchro-mutex.cpp
- **Semaphore:**
Shows how to use :cpp:type:`simgrid::s4u::Semaphore` synchronization objects.
.. tabs::
- .. example-tab:: examples/s4u/synchro-semaphore/s4u-synchro-semaphore.cpp
+ .. example-tab:: examples/cpp/synchro-semaphore/s4u-synchro-semaphore.cpp
+
+ .. example-tab:: examples/c/synchro-semaphore/synchro-semaphore.c
=============================
Interacting with the Platform
.. tabs::
- .. example-tab:: examples/s4u/platform-properties/s4u-platform-properties.cpp
+ .. example-tab:: examples/cpp/platform-properties/s4u-platform-properties.cpp
- :cpp:func:`simgrid::s4u::Actor::get_property()` and :cpp:func:`simgrid::s4u::Actor::set_property()`
- :cpp:func:`simgrid::s4u::Host::get_property()` and :cpp:func:`simgrid::s4u::Host::set_property()`
.. example-tab:: examples/c/platform-properties/platform-properties.c
- - :cpp:func:`sg_actor_get_property()` and :cpp:func:`sg_actor_set_property()`
- - :cpp:func:`sg_host_get_property()` and :cpp:func:sg_host_set_property()`
- - :cpp:func:`sg_link_get_property()` and :cpp:func:`sg_link_set_property()`
- - :cpp:func:`sg_link_get_property()` and :cpp:func:`sg_link_set_property()`
+ - :cpp:func:`sg_actor_get_property_value()`
+ - :cpp:func:`sg_host_get_property_value()` and :cpp:func:sg_host_set_property_value()`
+ - :cpp:func:`sg_zone_get_property_value()` and :cpp:func:`sg_zone_set_property_value()`
.. group-tab:: XML
**Deployment file:**
- .. showfile:: examples/s4u/platform-properties/s4u-platform-properties_d.xml
+ .. showfile:: examples/cpp/platform-properties/s4u-platform-properties_d.xml
:language: xml
|br|
.. showfile:: examples/platforms/prop.xml
:language: xml
- - **Retrieving the netzones matching a given criteria:**
+ - **Retrieving the netzones matching given criteria:**
Shows how to filter the cluster netzones.
.. tabs::
- .. example-tab:: examples/s4u/routing-get-clusters/s4u-routing-get-clusters.cpp
+ .. example-tab:: examples/cpp/routing-get-clusters/s4u-routing-get-clusters.cpp
- - **Retrieving the list of hosts matching a given criteria:**
- Shows how to filter the actors that match a given criteria.
+ - **Retrieving the list of hosts matching given criteria:**
+ Shows how to filter the actors that match given criteria.
.. tabs::
- .. example-tab:: examples/s4u/engine-filtering/s4u-engine-filtering.cpp
+ .. example-tab:: examples/cpp/engine-filtering/s4u-engine-filtering.cpp
- **Specifying state profiles:** shows how to specify when the
resources must be turned off and on again, and how to react to such
.. tabs::
- .. example-tab:: examples/s4u/platform-failures/s4u-platform-failures.cpp
+ .. example-tab:: examples/cpp/platform-failures/s4u-platform-failures.cpp
+
+ .. example-tab:: examples/c/platform-failures/platform-failures.c
.. group-tab:: XML
.. tabs::
- .. example-tab:: examples/s4u/platform-profile/s4u-platform-profile.cpp
+ .. example-tab:: examples/cpp/platform-profile/s4u-platform-profile.cpp
.. group-tab:: XML
=================
- **Describing the energy profiles in the platform:**
- This platform file contains the energy profile of each links and
- hosts, which is necessary to get energy consumption predictions.
- As usual, you should not trust our example, and you should strive
- to double-check that your instantiation matches your target platform.
+ The first platform file contains the energy profile of each link and
+ host for a wired network, which is necessary to get energy consumption
+ predictions. The second platform file is the equivalent for a wireless
+ network. As usual, you should not trust our example, and you should
+ strive to double-check that your instantiation matches your target
+ platform.
.. tabs::
- .. example-tab:: examples/platforms/energy_platform.xml
+ .. group-tab:: XML
+
+ .. showfile:: examples/platforms/energy_platform.xml
+ :language: xml
+
+ .. showfile:: examples/platforms/wifi_energy.xml
+ :language: xml
- **Consumption due to the CPU:**
This example shows how to retrieve the amount of energy consumed
.. tabs::
- .. example-tab:: examples/s4u/energy-exec/s4u-energy-exec.cpp
+ .. example-tab:: examples/cpp/energy-exec/s4u-energy-exec.cpp
.. example-tab:: examples/c/energy-exec/energy-exec.c
- - **Consumption due to the network:**
+ - **Consumption due to the wired network:**
This example shows how to retrieve and display the energy consumed
- by the network during communications.
+ by the wired network during communications.
.. tabs::
- .. example-tab:: examples/s4u/energy-link/s4u-energy-link.cpp
+ .. example-tab:: examples/cpp/energy-link/s4u-energy-link.cpp
+
+ - **Consumption due to the wireless network:**
+ This example shows how to retrieve and display the energy consumed
+ by the wireless network during communications.
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/energy-wifi/s4u-energy-wifi.cpp
- **Modeling the shutdown and boot of hosts:**
- Simple example of model of model for the energy consumption during
+ Simple example of a model for the energy consumption during
the host boot and shutdown periods.
.. tabs::
- .. example-tab:: examples/s4u/energy-boot/platform_boot.xml
+ .. example-tab:: examples/cpp/energy-boot/platform_boot.xml
- .. example-tab:: examples/s4u/energy-boot/s4u-energy-boot.cpp
+ .. example-tab:: examples/cpp/energy-boot/s4u-energy-boot.cpp
=======================
Tracing and Visualizing
=======================
Tracing can be activated by various configuration options which
-are illustrated in these example. See also the
+are illustrated in these examples. See also the
:ref:`full list of options related to tracing <tracing_tracing_options>`.
It is interesting to run the process-create example with the following
options to see the task executions:
- **Platform Tracing:**
- This program is a toy example just loading the platform, so that
- you can play with the platform visualization. Recommanded options:
+ This program is a toy example just loading the platform so that
+ you can play with the platform visualization. Recommended options:
``--cfg=tracing:yes --cfg=tracing/categorized:yes``
.. tabs::
- .. example-tab:: examples/s4u/trace-platform/s4u-trace-platform.cpp
+ .. example-tab:: examples/cpp/trace-platform/s4u-trace-platform.cpp
-========================
-Larger SimGrid Examplars
-========================
+ - **Setting Categories**
+ This example declares several tracing categories that are used to
+ classify its tasks. When the program is executed, the tracing mechanism
+ registers the resource utilization of hosts and links according to these
+ categories. Recommended options:
+ ``--cfg=tracing:yes --cfg=tracing/categorized:yes --cfg=tracing/uncategorized:yes``
-This section contains application examples that are somewhat larger
-than the previous examples.
+ .. tabs::
- - **Ping Pong:**
- This simple example just sends one message back and forth.
- The tesh file laying in the directory show how to start the simulator binary, highlighting how to pass options to
- the simulators (as detailed in Section :ref:`options`).
+ .. example-tab:: examples/cpp/trace-categories/s4u-trace-categories.cpp
+
+ - **Master Workers tracing**
+ This is an augmented version of our basic master/worker example using
+ several tracing features. It traces resource usage, sorted out in several
+ categories; Trace marks and user variables are also used. Recommended
+ options: ``--cfg=tracing/categorized:yes --cfg=tracing/uncategorized:yes``
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/trace-masterworkers/s4u-trace-masterworkers.cpp
+
+ - **Process migration tracing**
+ This version is enhanced so that the process migrations can be displayed
+ as arrows in a Gantt-chart visualization. Recommended options to that
+ extend: ``--cfg=tracing:yes --cfg=tracing/actor:yes``
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/trace-process-migration/s4u-trace-process-migration.cpp
+
+..
+ TODO: These tracing examples should be integrated in the examples to not
+ duplicate the C++ files. A full command line to see the result in the right
+ tool (vite/FrameSoc) should be given along with some screenshots.
+
+Tracing user variables
+----------------------
+
+You can also attach your own variables to any resource described in the platform
+file. The following examples illustrate this feature. They have to be run with
+the following options: ``--cfg=tracing:yes --cfg=tracing/platform:yes``
+
+ - **Attaching variables to Hosts**
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/trace-host-user-variables/s4u-trace-host-user-variables.cpp
+
+ - **Attaching variables to Links**
+ The tricky part is that you have to know the name of the link you want to
+ enhance with a variable.
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/trace-link-user-variables/s4u-trace-link-user-variables.cpp
+
+ - **Attaching variables to network Routes**
+ It is often easier to update a given variable for all links of a given
+ network path (identified by its source and destination hosts) instead of
+ knowing the name of each specific link.
.. tabs::
- .. example-tab:: examples/s4u/app-pingpong/s4u-app-pingpong.cpp
+ .. example-tab:: examples/cpp/trace-route-user-variables/s4u-trace-route-user-variables.cpp
- .. example-tab:: examples/c/app-pingpong/app-pingpong.c
+========================
+Larger SimGrid Exemplars
+========================
+
+This section contains application examples that are somewhat larger
+than the previous examples.
- **Token ring:**
Shows how to implement a classical communication pattern, where a
.. tabs::
- .. example-tab:: examples/s4u/app-token-ring/s4u-app-token-ring.cpp
+ .. example-tab:: examples/cpp/app-token-ring/s4u-app-token-ring.cpp
.. example-tab:: examples/c/app-token-ring/app-token-ring.c
- **Master Workers:**
- Another good old example, where one Master process has a bunch of task to dispatch to a set of several Worker
+ Another good old example, where one Master process has a bunch of tasks to dispatch to a set of several Worker
processes.
.. tabs::
more powerful for the users wanting to build their own projects upon
the example).
- .. showfile:: examples/s4u/app-masterworkers/s4u-app-masterworkers-class.cpp
+ .. showfile:: examples/cpp/app-masterworkers/s4u-app-masterworkers-class.cpp
:language: cpp
- .. showfile:: examples/s4u/app-masterworkers/s4u-app-masterworkers-fun.cpp
+ .. showfile:: examples/cpp/app-masterworkers/s4u-app-masterworkers-fun.cpp
+ :language: cpp
+
+ .. group-tab:: C
+
+ .. showfile:: examples/c/app-masterworker/app-masterworker.c
:language: cpp
Data diffusion
.. group-tab:: C++
- .. showfile:: examples/s4u/app-bittorrent/s4u-bittorrent.cpp
+ .. showfile:: examples/cpp/app-bittorrent/s4u-bittorrent.cpp
+ :language: cpp
+
+ .. showfile:: examples/cpp/app-bittorrent/s4u-peer.cpp
+ :language: cpp
+
+ .. showfile:: examples/cpp/app-bittorrent/s4u-tracker.cpp
:language: cpp
- .. showfile:: examples/s4u/app-bittorrent/s4u-peer.cpp
+ .. group-tab:: C
+
+ .. showfile:: examples/c/app-bittorrent/app-bittorrent.c
:language: cpp
- .. showfile:: examples/s4u/app-bittorrent/s4u-tracker.cpp
+ .. showfile:: examples/c/app-bittorrent/bittorrent-peer.c
+ :language: cpp
+
+ .. showfile:: examples/c/app-bittorrent/tracker.c
:language: cpp
- **Chained Send:**
.. tabs::
- .. example-tab:: examples/s4u/app-chainsend/s4u-app-chainsend.cpp
+ .. example-tab:: examples/cpp/app-chainsend/s4u-app-chainsend.cpp
.. group-tab:: C
.. group-tab:: C++
- .. showfile:: examples/s4u/dht-chord/s4u-dht-chord.cpp
+ .. showfile:: examples/cpp/dht-chord/s4u-dht-chord.cpp
:language: cpp
- .. showfile:: examples/s4u/dht-chord/s4u-dht-chord-node.cpp
+ .. showfile:: examples/cpp/dht-chord/s4u-dht-chord-node.cpp
:language: cpp
- **Kademlia**
.. group-tab:: C++
- .. showfile:: examples/s4u/dht-kademlia/s4u-dht-kademlia.cpp
+ .. showfile:: examples/cpp/dht-kademlia/s4u-dht-kademlia.cpp
+ :language: cpp
+
+ .. showfile:: examples/cpp/dht-kademlia/routing_table.cpp
+ :language: cpp
+
+ .. showfile:: examples/cpp/dht-kademlia/answer.cpp
+ :language: cpp
+
+ .. showfile:: examples/cpp/dht-kademlia/node.cpp
+ :language: cpp
+
+ .. group-tab:: C
+
+ .. showfile:: examples/c/dht-kademlia/dht-kademlia.c
+ :language: cpp
+
+ .. showfile:: examples/c/dht-kademlia/routing_table.c
:language: cpp
- .. showfile:: examples/s4u/dht-kademlia/routing_table.cpp
+ .. showfile:: examples/c/dht-kademlia/answer.c
:language: cpp
- .. showfile:: examples/s4u/dht-kademlia/answer.cpp
+ .. showfile:: examples/c/dht-kademlia/message.c
:language: cpp
- .. showfile:: examples/s4u/dht-kademlia/node.cpp
+ .. showfile:: examples/c/dht-kademlia/node.c
:language: cpp
.. _s4u_ex_clouds:
-----------------
- **Cloud basics**
- This example starts some computations both on PMs and VMs, and
+ This example starts some computations both on PMs and VMs and
migrates some VMs around.
.. tabs::
- .. example-tab:: examples/s4u/cloud-simple/s4u-cloud-simple.cpp
+ .. example-tab:: examples/cpp/cloud-simple/s4u-cloud-simple.cpp
.. example-tab:: examples/c/cloud-simple/cloud-simple.c
.. tabs::
- .. example-tab:: examples/s4u/cloud-migration/s4u-cloud-migration.cpp
+ .. example-tab:: examples/cpp/cloud-migration/s4u-cloud-migration.cpp
.. example-tab:: examples/c/cloud-migration/cloud-migration.c
+=======================
+Model-Related Examples
+=======================
+
+ - **ns-3 as a SimGrid Network Model**
+ This simple ping-pong example demonstrates how to use the bindings to the Network
+ Simulator. The most interesting is probably not the C++ files since
+ they are unchanged from the other simulations, but the associated files,
+ such as the platform file to see how to declare a platform to be used
+ with the ns-3 bindings of SimGrid and the tesh file to see how to
+ start a simulation in these settings.
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/network-ns3/s4u-network-ns3.cpp
+
+ .. group-tab:: XML
+
+ **Platform files:**
+
+ .. showfile:: examples/platforms/small_platform_one_link_routes.xml
+ :language: xml
+
+ - **wifi links**
+
+ This demonstrates how to declare a wifi zone in your platform and
+ how to use it in your simulation. For that, you should have a link
+ whose sharing policy is set to `WIFI`. Such links can have more
+ than one bandwidth value (separated by commas), corresponding to
+ the several SNR level of your wifi link.
+
+ In this case, SimGrid automatically switches to validated
+ performance models of wifi networks, where the time is shared
+ between users instead of the bandwidth for wired links (the
+ corresponding publication is currently being written).
+
+ If your wifi link provides more than one SNR level, you can switch
+ the level of a given host using
+ :cpp:func:`simgrid::s4u::Link::set_host_wifi_rate`. By default,
+ the first level is used.
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/network-wifi/s4u-network-wifi.cpp
+
+ .. group-tab:: XML
+
+ **Platform files:**
+
+ .. showfile:: examples/platforms/wifi.xml
+ :language: xml
+
+===============
+Plugin Examples
+===============
+
+It is possible to extend SimGrid without modifying its internals by
+attaching code to the existing signals and by adding extra data to the
+simulation objects through extensions. How to do that is not exactly
+documented yet, and you should look for examples in the src/plugins
+directory.
+
+This section documents how the existing plugins can be used. Remember
+that you are very welcome to modify the plugins to fit your needs. It
+should be much easier than modifying the SimGrid kernel.
+
+ - **Monitoring the host load**
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/plugin-host-load/s4u-plugin-host-load.cpp
+
+ .. example-tab:: examples/c/plugin-host-load/plugin-host-load.c
+
+ - **Monitoring the link load**
+
+ .. tabs::
+
+ .. example-tab:: examples/cpp/plugin-link-load/s4u-plugin-link-load.cpp
+
=======================
Model-Checking Examples
=======================
The model-checker can be used to exhaustively search for issues in the
-tested application. It must be activated at compile time, but this
-mode is rather experimental in SimGrid (as of v3.22). You should not
+tested application. It must be activated at compile-time, but this
+mode is rather experimental in SimGrid (as of v3.25). You should not
enable it unless you really want to formally verify your applications:
-SimGrid is slower and maybe less robust when MC is enabled.
+SimGrid is slower and may be less robust when MC is enabled.
- **Failing assert**
In this example, two actors send some data to a central server,
which asserts that the messages are always received in the same order.
- This is obviously wrong, and the model-checker correctly finds a
+ This is wrong, and the model-checker correctly finds a
counter-example to that assertion.
.. tabs::
- .. example-tab:: examples/s4u/mc-failing-assert/s4u-mc-failing-assert.cpp
+ .. example-tab:: examples/cpp/mc-failing-assert/s4u-mc-failing-assert.cpp
.. |br| raw:: html
<br />
-
-.. |cpp| image:: /img/lang_cpp.png
- :align: middle
- :width: 12
-
-.. |py| image:: /img/lang_python.png
- :align: middle
- :width: 12
