mv examples/s4u examples/cpp

[simgrid.git] / examples / cpp / exec-basic / s4u-exec-basic.cpp

diff --git a/examples/cpp/exec-basic/s4u-exec-basic.cpp b/examples/cpp/exec-basic/s4u-exec-basic.cpp
new file mode 100644 (file)
index 0000000..ec4e159
--- /dev/null
+++ b/examples/cpp/exec-basic/s4u-exec-basic.cpp
@@ -0,0 +1,51 @@
+/* Copyright (c) 2010-2021. 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"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
+
+static void executor()
+{
+  /* this_actor::execute() tells SimGrid to pause the calling actor
+   * until its host has computed the amount of flops passed as a parameter */
+  simgrid::s4u::this_actor::execute(98095);
+  XBT_INFO("Done.");
+
+  /* This simple example does not do anything beyond that */
+}
+
+static void privileged()
+{
+  /* This version of this_actor::execute() specifies that this execution
+   * gets a larger share of the resource.
+   *
+   * Since the priority is 2, it computes twice as fast as a regular one.
+   *
+   * So instead of a half/half sharing between the two executions,
+   * we get a 1/3 vs 2/3 sharing. */
+  simgrid::s4u::this_actor::execute(98095, 2);
+  XBT_INFO("Done.");
+
+  /* Note that the timings printed when executing this example are a bit misleading,
+   * because the uneven sharing only last until the privileged actor ends.
+   * After this point, the unprivileged one gets 100% of the CPU and finishes
+   * quite quickly. */
+}
+
+int main(int argc, char* argv[])
+{
+  simgrid::s4u::Engine e(&argc, argv);
+  xbt_assert(argc > 1, "Usage: %s platform_file\n\tExample: %s ../platforms/small_platform.xml\n", argv[0], argv[0]);
+
+  e.load_platform(argv[1]);
+
+  simgrid::s4u::Actor::create("executor", simgrid::s4u::Host::by_name("Tremblay"), executor);
+  simgrid::s4u::Actor::create("privileged", simgrid::s4u::Host::by_name("Tremblay"), privileged);
+
+  e.run();
+
+  return 0;
+}