--- /dev/null
+# Copyright (c) 2010-2022. The SimGrid Team. All rights reserved.
+
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the license (GNU LGPL) which comes with this package.
+
+# ##################################################################################
+# Take this tutorial online: https://simgrid.org/doc/latest/Tutorial_Algorithms.html
+# ##################################################################################
+
+from simgrid import Actor, Engine, Host, Mailbox, this_actor
+import sys
+
+# master-begin
+def master(*args):
+ if len(args) == 2:
+ raise AssertionError(
+ f"Actor master requires 4 parameters, but only {len(args)}")
+ worker_count = int(args[0])
+ tasks_count = int(args[1])
+ compute_cost = int(args[2])
+ communicate_cost = int(args[3])
+ this_actor.info(f"Got {worker_count} workers and {tasks_count} tasks to process")
+
+ for i in range(tasks_count): # For each task to be executed:
+ # - Select a worker in a round-robin way
+ mailbox = Mailbox.by_name(str(i % worker_count))
+
+ # - Send the computation amount to the worker
+ if (tasks_count < 10000 or (tasks_count < 100000 and i % 10000 == 0) or i % 100000 == 0):
+ this_actor.info(f"Sending task {i} of {tasks_count} to mailbox '{mailbox.name}'")
+ mailbox.put(compute_cost, communicate_cost)
+
+ this_actor.info("All tasks have been dispatched. Request all workers to stop.")
+ for i in range (worker_count):
+ # The workers stop when receiving a negative compute_cost
+ mailbox = Mailbox.by_name(str(i))
+ mailbox.put(-1, 0)
+# master-end
+
+# worker-begin
+def worker(*args):
+ assert len(args) == 1, "The worker expects one argument"
+
+ mailbox = Mailbox.by_name(args[0])
+ done = False
+ while not done:
+ compute_cost = mailbox.get()
+ if compute_cost > 0: # If compute_cost is valid, execute a computation of that cost
+ this_actor.execute(compute_cost)
+ else: # Stop when receiving an invalid compute_cost
+ done = True
+
+ this_actor.info("Exiting now.")
+# worker-end
+
+# main-begin
+if __name__ == '__main__':
+ assert len(sys.argv) > 2, f"Usage: python app-masterworkers.py platform_file deployment_file"
+
+ e = Engine(sys.argv)
+
+ # Register the classes representing the actors
+ e.register_actor("master", master)
+ e.register_actor("worker", worker)
+
+ # Load the platform description and then deploy the application
+ e.load_platform(sys.argv[1])
+ e.load_deployment(sys.argv[2])
+
+ # Run the simulation
+ e.run()
+
+ this_actor.info("Simulation is over")
+# main-end
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