+/* Copyright (c) 2007-2020. 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/actor.h"
+#include "simgrid/engine.h"
+#include "simgrid/host.h"
+#include "simgrid/plugins/energy.h"
+#include "simgrid/vm.h"
+#include "xbt/asserts.h"
+#include "xbt/log.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(energy_vm, "Messages of this example");
+
+static void worker_func(XBT_ATTRIB_UNUSED int argc, XBT_ATTRIB_UNUSED char* argv[])
+{
+ sg_actor_self_execute(300E6);
+ XBT_INFO("This worker is done.");
+}
+
+static void dvfs(XBT_ATTRIB_UNUSED int argc, XBT_ATTRIB_UNUSED char* argv[])
+{
+ sg_host_t host1 = sg_host_by_name("MyHost1");
+ sg_host_t host2 = sg_host_by_name("MyHost2");
+ sg_host_t host3 = sg_host_by_name("MyHost3");
+
+ /* Host 1 */
+ XBT_INFO("Creating and starting two VMs");
+ sg_vm_t vm_host1 = sg_vm_create_core(host1, "vm_host1");
+ sg_vm_start(vm_host1);
+ sg_vm_t vm_host2 = sg_vm_create_core(host2, "vm_host2");
+ sg_vm_start(vm_host2);
+
+ XBT_INFO("Create two tasks on Host1: both inside a VM");
+ sg_actor_t p11 = sg_actor_init("p11", (sg_host_t)vm_host1);
+ sg_actor_start(p11, worker_func, 0, NULL);
+ sg_actor_t p12 = sg_actor_init("p12", (sg_host_t)vm_host1);
+ sg_actor_start(p12, worker_func, 0, NULL);
+
+ XBT_INFO("Create two tasks on Host2: one inside a VM, the other directly on the host");
+ sg_actor_t p21 = sg_actor_init("p21", (sg_host_t)vm_host2);
+ sg_actor_start(p21, worker_func, 0, NULL);
+ sg_actor_t p22 = sg_actor_init("p22", host2);
+ sg_actor_start(p22, worker_func, 0, NULL);
+
+ XBT_INFO("Create two tasks on Host3: both directly on the host");
+ sg_actor_t p31 = sg_actor_init("p31", host3);
+ sg_actor_start(p31, worker_func, 0, NULL);
+ sg_actor_t p32 = sg_actor_init("p32", host3);
+ sg_actor_start(p32, worker_func, 0, NULL);
+
+ XBT_INFO("Wait 5 seconds. The tasks are still running (they run for 3 seconds, but 2 tasks are co-located, "
+ "so they run for 6 seconds)");
+ sg_actor_sleep_for(5);
+ XBT_INFO("Wait another 5 seconds. The tasks stop at some point in between");
+ sg_actor_sleep_for(5);
+
+ sg_vm_destroy(vm_host1);
+ sg_vm_destroy(vm_host2);
+}
+
+int main(int argc, char* argv[])
+{
+ sg_host_energy_plugin_init();
+ simgrid_init(&argc, argv);
+
+ xbt_assert(argc > 1, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
+
+ simgrid_load_platform(argv[1]);
+
+ sg_actor_t actor = sg_actor_init("dvfs", sg_host_by_name("MyHost1"));
+ sg_actor_start(actor, dvfs, 0, NULL);
+
+ simgrid_run();
+
+ XBT_INFO("Total simulation time: %.2f; Host2 and Host3 must have the exact same energy consumption; Host1 is "
+ "multi-core and will differ.",
+ simgrid_get_clock());
+
+ return 0;
+}