--- /dev/null
+# Copyright (c) 2018-2022. 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.
+
+
+# This script does exactly the same thing as file s4u-exec-ptask.cpp
+
+import sys
+from simgrid import Actor, Engine, Host, this_actor, TimeoutException
+
+def runner():
+ hosts = Engine.instance.all_hosts
+ hosts_count = len(hosts)
+
+ # Test 1
+ this_actor.info("First, build a classical parallel activity, with 1 Gflop to execute on each node, "
+ "and 10MB to exchange between each pair")
+ computation_amounts = [1e9]*hosts_count
+ communication_amounts = [0]*hosts_count*hosts_count
+ for i in range(hosts_count):
+ for j in range(i+1, hosts_count):
+ communication_amounts[i * hosts_count + j] = 1e7
+ this_actor.parallel_execute(hosts, computation_amounts, communication_amounts)
+
+ # Test 2
+ this_actor.info("We can do the same with a timeout of 10 seconds enabled.")
+ activity = this_actor.exec_init(hosts, computation_amounts, communication_amounts)
+ try:
+ activity.wait_for(10.0)
+ sys.exit("Woops, this did not timeout as expected... Please report that bug.")
+ except TimeoutException:
+ this_actor.info("Caught the expected timeout exception.")
+ activity.cancel()
+
+ # Test 3
+ this_actor.info("Then, build a parallel activity involving only computations (of different amounts) and no communication")
+ computation_amounts = [3e8, 6e8, 1e9]
+ communication_amounts = []
+ this_actor.parallel_execute(hosts, computation_amounts, communication_amounts)
+
+ # Test 4
+ this_actor.info("Then, build a parallel activity with no computation nor communication (synchro only)")
+ computation_amounts = []
+ this_actor.parallel_execute(hosts, computation_amounts, communication_amounts)
+
+ # Test 5
+ this_actor.info("Then, Monitor the execution of a parallel activity")
+ computation_amounts = [1e6]*hosts_count
+ communication_amounts = [0, 1e6, 0, 0, 0, 1e6, 1e6, 0, 0]
+ activity = this_actor.exec_init(hosts, computation_amounts, communication_amounts)
+ activity.start()
+ while not activity.test():
+ ratio = activity.remaining_ratio * 100
+ this_actor.info(f"Remaining flop ratio: {ratio:.0f}%")
+ this_actor.sleep_for(5)
+ activity.wait()
+
+ # Test 6
+ this_actor.info("Finally, simulate a malleable task (a parallel execution that gets reconfigured after its start).")
+ this_actor.info(" - Start a regular parallel execution, with both comm and computation")
+ computation_amounts = [1e6]*hosts_count
+ communication_amounts = [0, 1e6, 0, 0, 1e6, 0, 1e6, 0, 0]
+ activity = this_actor.exec_init(hosts, computation_amounts, communication_amounts)
+ activity.start()
+ this_actor.sleep_for(10)
+ remaining_ratio = activity.remaining_ratio
+ this_actor.info(f" - After 10 seconds, {remaining_ratio*100:.2f}% remains to be done. Change it from 3 hosts to 2 hosts only.")
+ this_actor.info(" Let's first suspend the task.")
+ activity.suspend()
+ this_actor.info(" - Now, simulate the reconfiguration (modeled as a comm from the removed host to the remaining ones).")
+ rescheduling_comp = [0, 0, 0]
+ rescheduling_comm = [0, 0, 0, 0, 0, 0, 25000, 25000, 0]
+ this_actor.parallel_execute(hosts, rescheduling_comp, rescheduling_comm)
+ this_actor.info(" - Now, let's cancel the old task and create a new task with modified comm and computation vectors:")
+ this_actor.info(" What was already done is removed, and the load of the removed host is shared between remaining ones.")
+ for i in range(2):
+ # remove what we've done so far, for both comm and compute load
+ computation_amounts[i] *= remaining_ratio
+ communication_amounts[i] *= remaining_ratio
+ # The work from 1 must be shared between 2 remaining ones. 1/2=50% of extra work for each
+ computation_amounts[i] *= 1.5;
+ communication_amounts[i] *= 1.5;
+ hosts = hosts[:2]
+ computation_amounts = computation_amounts[:2]
+ remaining_comm = communication_amounts[1]
+ communication_amounts = [0, remaining_comm, remaining_comm, 0]
+ activity.cancel()
+ activity = this_actor.exec_init(hosts, computation_amounts, communication_amounts)
+ this_actor.info(" - Done, let's wait for the task completion")
+ activity.wait()
+ this_actor.info("Goodbye now!")
+
+
+if __name__ == "__main__":
+ if len(sys.argv) != 2:
+ sys.exit(f"Syntax: {sys.argv[0]} <platform_file>")
+ platform = sys.argv[1]
+ engine = Engine.instance
+ Engine.set_config("host/model:ptask_L07") # /!\ this is required for running ptasks
+ engine.load_platform(platform)
+ Actor.create("foo", engine.host_by_name("MyHost1"), runner)
+ engine.run()
