attempt to extend S4U to migrate actors

[simgrid.git] / examples / s4u / actor-migration / s4u_actor-migration.cpp

diff --git a/examples/s4u/actor-migration/s4u_actor-migration.cpp b/examples/s4u/actor-migration/s4u_actor-migration.cpp
new file mode 100644 (file)
index 0000000..c5ecf5f
--- /dev/null
+++ b/examples/s4u/actor-migration/s4u_actor-migration.cpp
@@ -0,0 +1,76 @@
+/* Copyright (c) 2017. 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. */
+
+#include <simgrid/s4u.hpp>
+#include <simgrid/s4u/Mutex.hpp>
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_actor_migration, "Messages specific for this s4u example");
+
+simgrid::s4u::MutexPtr checkpoint                 = nullptr;
+simgrid::s4u::ConditionVariablePtr identification = nullptr;
+static simgrid::s4u::ActorPtr controlled_process  = nullptr;
+
+/* The Emigrant process will be moved from host to host. */
+static void emigrant()
+{
+  XBT_INFO("I'll look for a new job on another machine ('Boivin') where the grass is greener.");
+  simgrid::s4u::this_actor::migrate(
+      simgrid::s4u::Host::by_name("Boivin")); /* - First, move to another host by myself */
+
+  XBT_INFO("Yeah, found something to do");
+  simgrid::s4u::this_actor::execute(98095000);
+  simgrid::s4u::this_actor::sleep_for(2);
+
+  XBT_INFO("Moving back home after work");
+  simgrid::s4u::this_actor::migrate(simgrid::s4u::Host::by_name("Jacquelin")); /* - Move back to original location */
+
+  simgrid::s4u::this_actor::migrate(simgrid::s4u::Host::by_name("Boivin")); /* - Go back to the other host to sleep*/
+  simgrid::s4u::this_actor::sleep_for(4);
+
+  checkpoint->lock();                               /* - Get controlled at checkpoint */
+  controlled_process = simgrid::s4u::Actor::self(); /* - and get moved back by the policeman process */
+  identification->notify_all();
+  checkpoint->unlock();
+
+  // TODO simgrid::s4u::this_actor::suspend(); to replace the sleep below
+  simgrid::s4u::this_actor::sleep_for(4);
+  XBT_INFO("I've been moved on this new host: %s", simgrid::s4u::this_actor::host()->cname());
+  XBT_INFO("Uh, nothing to do here. Stopping now");
+}
+
+/* The policeman check for emigrants and move them back to 'Jacquelin' */
+static void policeman()
+{
+  checkpoint->lock();
+
+  XBT_INFO("Wait at the checkpoint."); /* - block on the mutex+condition */
+  while (controlled_process == nullptr)
+    identification->wait(checkpoint);
+
+  controlled_process->migrate(simgrid::s4u::Host::by_name("Jacquelin")); /* - Move an emigrant to Jacquelin */
+  XBT_INFO("I moved the emigrant");
+  // TODO simgrid::s4u::this_actor::resume()
+
+  checkpoint->unlock();
+}
+
+int main(int argc, char* argv[])
+{
+  simgrid::s4u::Engine* e = new simgrid::s4u::Engine(&argc, argv);
+  xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
+  e->loadPlatform(argv[1]); /* - Load the platform description */
+
+  /* - Create and deploy the emigrant and policeman processes */
+  simgrid::s4u::Actor::createActor("emigrant", simgrid::s4u::Host::by_name("Jacquelin"), emigrant);
+  simgrid::s4u::Actor::createActor("policeman", simgrid::s4u::Host::by_name("Boivin"), policeman);
+
+  checkpoint     = simgrid::s4u::Mutex::createMutex(); /* - Initiate the mutex and conditions */
+  identification = simgrid::s4u::ConditionVariable::createConditionVariable();
+  e->run();
+
+  XBT_INFO("Simulation time %g", e->getClock());
+
+  return 0;
+}