1 This file follows the Doxygen syntax to be included in the
2 documentation, but it should remain readable directly.
5 @defgroup msg_examples MSG examples
7 @brief Find the MSG example fitting your needs from the extensive set provided in the archive.
13 - @ref msg_ex_tracing_user_variables
20 @section msg_ex_basics Basic examples and features
22 - <b>Ping Pong</b>: @ref examples/msg/app-pingpong/app-pingpong.c\n
23 It's hard to think of a simpler example: it is just sending one
24 message back and forth.
25 The tesh file laying in the directory show how to start the
26 simulator binary, highlighting how to pass options to the simulators
27 (as detailed in Section \ref options).
30 @ref examples/msg/app-token-ring/app-token-ring.c\n
31 Classical communication pattern, where a token is exchanged
32 along a ring to reach every participant.
33 The tesh file laying in the directory shows how to run the same
34 example on different virtual platforms.
36 - <b>Master Workers</b>.
37 @ref examples/msg/app-masterworker/app-masterworker.c\n
38 Another good old example, where one Master process has a bunch of
39 task to dispatch to a set of several Worker processes. It is fully
40 commented in @ref msg_ex_master_worker.
42 @section msg_ex_async Asynchronous communications
44 In addition to the fully documented example of @ref
45 MSG_ex_asynchronous_communications, there are several other examples
46 shipped in the archive:
48 - <b>Basic asynchronous communications</b>.
49 @ref examples/msg/async-wait/async-wait.c \n
50 Illustrates how to have non-blocking communications, that are
51 communications running in the background leaving the process free
52 to do something else during their completion. The main functions
53 involved are @ref MSG_task_isend, @ref MSG_task_irecv, and @ref
56 - <b>Waiting for all communications in a set</b>.
57 @ref examples/msg/async-waitall/async-waitall.c\n
58 The @ref MSG_comm_waitall function is useful when you want to block
59 until all activities in a given set have completed.
61 - <b>Waiting for the first completed communication in a set</b>.
62 @ref examples/msg/async-waitany/async-waitany.c\n
63 The @ref MSG_comm_waitany function is useful when you want to block
64 until one activity of the set completes, no matter which terminates
67 @section msg_ex_process Acting on Processes
69 - <b>Creating processes</b>.
70 @ref examples/msg/process-create/process-create.c \n
71 Most processes are started from the deployment XML file, but they
72 can also be used with the @ref MSG_process_create() function.
74 - <b>Suspend and Resume processes</b>.
75 @ref examples/msg/process-suspend/process-suspend.c \n
76 Processes can be suspended and resumed during their executions
77 thanks to the @ref MSG_process_suspend and @ref MSG_process_resume functions.
79 - <b>Kill processes</b>.
80 @ref examples/msg/process-kill/process-kill.c \n
81 Processes can forcefully stop other processes with the @ref MSG_process_kill function.
83 - <b>Migrating processes</b>.
84 @ref examples/msg/process-migration/process-migration.c \n
85 Processes can move or be moved from a host to another with the @ref MSG_process_migrate function.
87 - <b>Yielding to other processes</b>.
88 @ref examples/msg/process-yield/process-yield.c\n
89 The @ref MSG_process_yield function interrupts the execution of the
90 current process, leaving a chance to run to the other processes
91 that are ready to run at the exact same timestamp
93 - <b>Controling the process life cycle from the XML</b>.
94 @ref examples/msg/process-startkilltime/process-startkilltime.c \n
95 You can specify a start time and a kill time in the deployment
96 file. See all *_d.xml files in this directory.
98 - <b>Using Pstates on a host</b>
99 @ref examples/msg/energy-pstate/energy-pstate.c\n
100 Show how define a set of pstates for a host and how the current
101 pstate can be accessed/changed with @ref MSG_get_host_current_power_peak and @ref MSG_set_host_pstate.
102 See also the platform XML file for have a details on how to declare the CPU capacity for each pstate.
104 @section msg_ex_tracing Tracing and visualization features
106 Tracing can be activated by various configuration options which
107 are illustrated in these example. See also the
108 @ref tracing_tracing_options "full list of options related to tracing".
110 It is interesting to run the process-create example with the following
111 options to see the task executions:
113 - <b>Platform tracing</b>.
114 @ref examples/msg/trace-platform/trace-platform.c \n
115 This program is a toy example just loading the platform, so that
116 you can play with the platform visualization. Recommanded options:
117 @verbatim --cfg=tracing:yes --cfg=tracing/categorized:yes
120 - <b>Setting Categories</b>.
121 @ref examples/msg/trace-categories/trace-categories.c \n
122 This example declares several tracing categories
123 to that are used to classify its tasks. When the program is executed,
124 the tracing mechanism registers the resource utilization of hosts
125 and links according to these categories. Recommanded options:
126 @verbatim --cfg=tracing:yes --cfg=tracing/categorized:yes --cfg=tracing/uncategorized:yes --cfg=viva/categorized:viva_cat.plist --cfg=viva/uncategorized:viva_uncat.plist
129 - <b>Master Workers tracing</b>.
130 @ref examples/msg/trace-masterworker/trace-masterworker.c \n
131 This is an augmented version of our basic master/worker example
132 using several tracing features. It traces resource usage, sorted
133 out in several categories; Trace marks and user variables are also
134 used. Recommanded options:
135 @verbatim --cfg=tracing/categorized:yes --cfg=tracing/uncategorized:yes --cfg=viva/categorized:viva_cat.plist --cfg=viva/uncategorized:viva_uncat.plist
138 - <b>Process migration tracing</b>.
139 @ref examples/msg/trace-process-migration/trace-process-migration.c \n
140 This version is enhanced so that the process migrations can be
141 displayed as arrows in a Gantt-chart visualization. Recommanded
142 options to that extend:
143 @verbatim -cfg=tracing:yes --cfg=tracing/msg/process:yes
146 TODO: These tracing examples should be integrated in the examples to
147 not duplicate the C files. A full command line to see the result in
148 the right tool (viva/vite/FrameSoc) should be given along with some
151 @subsection msg_ex_tracing_user_variables Tracing user variables
153 You can also attach your own variables to a any resource described in
154 the platform file. The following examples illustrate this feature.
155 They have to be run with the following options:
156 @verbatim --cfg=tracing:yes --cfg=tracing/platform:yes
159 - <b>Attaching variables to Hosts</b>.
160 @ref examples/msg/trace-host-user-variables/trace-host-user-variables.c
162 - <b>Attaching variables to Links</b>.
163 @ref examples/msg/trace-link-user-variables/trace-link-user-variables.c \n
164 The tricky part is that you have to know the name of the link you
165 want to enhance with a variable.
167 - <b>Attaching variables to network Routes</b>
168 @ref examples/msg/trace-route-user-variables/trace-route-user-variables.c \n
169 It is often easier to update a given variable for all links of a
170 given network path (identified by its source and destination
171 hosts) instead of knowing the name of each specific link.
173 @section msg_ex_models Models-related examples
175 @subsection msg_ex_ns3 NS3 as a SimGrid Network Model
177 This example demonstrates how to use the bindings to the Network
178 Simulator, as explained in @ref pls_ns3. The most
179 interesting is probably not the C files since they are unchanged from
180 the other simulations, but the associated files, such as the platform
181 file to see how to declare a platform to be used with the ns-3 bindings
182 of SimGrid and the tesh file to see how to actually start a simulation
185 - @ref examples/msg/network-ns3/network-ns3.c. Simple ping-pong using
186 ns-3 instead of the SimGrid network models.
188 TODO: merge the C files
190 TODO: show the XML files instead if it's what is interesting. On a "XML example files" page that does not exist yet.
192 @subsection msg_ex_io Simulating disks and files
194 The examples of this section demonstrate how to interact with the
197 - <b>Basic example</b>.
198 @ref examples/msg/io-storage/io-storage.c \n
199 All main storage and file functions are demoed.
201 - <b>File Management</b>. @ref examples/msg/io-file/io-file.c \n
202 This example illustrates the use of operations on file
203 (@ref MSG_file_open, @ref MSG_file_read, @ref MSG_file_write,
204 or @ref MSG_file_close).
206 - <b>Remote I/O</b>. @ref examples/msg/io-remote/io-remote.c \n
207 I/O operations can also be done in a remote, i.e. when the
208 accessed disk is not mounted on the caller's host.
210 @section msg_ex_misc Miscellaneous
212 - <b>Task priorities</b>.
213 @ref examples/msg/task-priority/task-priority.c \n
214 Demonstrates the use of @ref MSG_task_set_priority to change the
215 computation priority of a given task.
217 - <b>User-defined properties</b>.
218 @ref examples/msg/platform-properties/platform-properties.c \n
219 Attaching arbitrary information to host, processes and
220 such, and retrieving them with @ref MSG_host_get_properties,
221 @ref MSG_host_get_property_value, @ref MSG_process_get_properties, and
222 @ref MSG_process_get_property_value. Also make sure to read the
223 platform and deployment XML files to see how to declare these data.
225 TODO: Document the many other examples that we have
228 As a human, you can stop reading at this point. The rest is garbage:
230 Every example must be listed in the following, but it's not possible
231 to move this content upper as each @example directive seems to eat
232 everything until the next */ marker (and the content is placed at the
233 top of the example file).
237 @example examples/msg/app-pingpong/app-pingpong.c
238 @example examples/msg/app-token-ring/app-token-ring.c
239 @example examples/msg/app-masterworker/app-masterworker.c
241 @example examples/msg/async-wait/async-wait.c
242 @example examples/msg/async-waitall/async-waitall.c
243 @example examples/msg/async-waitany/async-waitany.c
244 @example examples/msg/async-yield/async-yield.c
246 @example examples/msg/process-create/process-create.c
247 @example examples/msg/process-suspend/process-suspend.c
248 @example examples/msg/process-kill/process-kill.c
249 @example examples/msg/process-migration/process-migration.c
250 @example examples/msg/process-startkilltime/process-startkilltime.c
252 @example examples/msg/trace-platform/trace-platform.c
253 @example examples/msg/trace-categories/trace-categories.c
254 @example examples/msg/trace-masterworker/trace-masterworker.c
255 @example examples/msg/trace-process-migration/trace-process-migration.c
256 @example examples/msg/trace-host-user-variables/trace-host-user-variables.c
257 @example examples/msg/trace-link-user-variables/trace-link-user-variables.c
258 @example examples/msg/trace-route-user-variables/trace-route-user-variables.c
260 @example examples/msg/network-ns3/network-ns3.c
262 @example examples/msg/io-storage/io-storage.c
263 @example examples/msg/io-file/io-file.c
264 @example examples/msg/io-remote/io-remote.c
266 @example examples/msg/task-priority/task-priority.c
267 @example examples/msg/platform-properties/platform-properties.c