+/* 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 writer()
+{
+ /* - Retrieve all disks from current host */
+ std::vector<simgrid::s4u::Disk*> const& disk_list = simgrid::s4u::Host::current()->get_disks();
+ /* - Write 400,000 bytes on Disk1 */
+ disk_list.front()->write(4000000);
+ XBT_INFO("Done.");
+}
+
+static void privileged_writer()
+{
+ /* - Retrieve all disks from current host */
+ std::vector<simgrid::s4u::Disk*> const& disk_list = simgrid::s4u::Host::current()->get_disks();
+
+ /* - Write 400,000 bytes on Disk1 but specifies that this I/O operation gets a larger share of the resource.
+ *
+ * Since the priority is 2, it writes twice as fast as a regular one.
+ *
+ * So instead of a half/half sharing between the two, we get a 1/3 vs. 2/3 sharing. */
+ disk_list.front()->io_init(4000000, simgrid::s4u::Io::OpType::WRITE)->set_priority(2)->wait();
+ XBT_INFO("Done.");
+
+ /* Note that the timings printed when running 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 platform.xml\n", argv[0], argv[0]);
+
+ e.load_platform(argv[1]);
+
+ simgrid::s4u::Actor::create("writer", e.host_by_name("bob"), writer);
+ simgrid::s4u::Actor::create("privileged_writer", e.host_by_name("bob"), privileged_writer);
+
+ e.run();
+
+ return 0;
+}