Add PAPI libraries to mc/remote filtered libraries.

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

diff --git a/examples/s4u/exec-ptask/s4u-exec-ptask.cpp b/examples/s4u/exec-ptask/s4u-exec-ptask.cpp
index 267be8c..d2ffff9 100644 (file)
--- a/examples/s4u/exec-ptask/s4u-exec-ptask.cpp
+++ b/examples/s4u/exec-ptask/s4u-exec-ptask.cpp
@@ -1,8 +1,23 @@
-/* Copyright (c) 2017. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2017-2018. 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. */
 
+/* Parallel tasks are convenient abstractions of parallel computational kernels that span over several machines.
+ * To create a new one, you have to provide several things:
+ *   - a vector of hosts on which the task will execute
+ *   - a vector of values, the amount of computation for each of the hosts (in flops)
+ *   - a matrix of values, the amount of communication between each pair of hosts (in bytes)
+ *
+ * Each of these operation will be processed at the same relative speed.
+ * This means that at some point in time, all sub-executions and all sub-communications will be at 20% of completion.
+ * Also, they will all complete at the exact same time.
+ *
+ * This is obviously a simplistic abstraction, but this is very handful in a large amount of situations.
+ *
+ * Please note that you must have the LV07 platform model enabled to use such constructs.
+ */
+
 #include "simgrid/plugins/energy.h"
 #include <simgrid/s4u.hpp>
 #include <xbt/ex.hpp>
@@ -13,8 +28,8 @@ XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_energyptask, "Messages specific for this s4u ex
 static void runner()
 {
   /* Retrieve the list of all hosts as an array of hosts */
-  int hosts_count            = sg_host_count();
-  simgrid::s4u::Host** hosts = sg_host_list();
+  std::vector<simgrid::s4u::Host*> hosts = simgrid::s4u::Engine::get_instance()->get_all_hosts();
+  int hosts_count = hosts.size();
 
   XBT_INFO("First, build a classical parallel task, with 1 Gflop to execute on each node, "
            "and 10MB to exchange between each pair");
@@ -28,7 +43,7 @@ static void runner()
     for (int j = i + 1; j < hosts_count; j++)
       communication_amounts[i * hosts_count + j] = 1e7; // 10 MB
 
-  simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, communication_amounts);
+  simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts.data(), computation_amounts, communication_amounts);
 
   XBT_INFO("We can do the same with a timeout of one second enabled.");
   computation_amounts   = new double[hosts_count]();
@@ -42,7 +57,7 @@ static void runner()
       communication_amounts[i * hosts_count + j] = 1e7; // 10 MB
 
   try {
-    simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, communication_amounts,
+    simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts.data(), computation_amounts, communication_amounts,
                                                1.0 /* timeout (in seconds)*/);
     XBT_WARN("Woops, this did not timeout as expected... Please report that bug.");
   } catch (xbt_ex& e) {
@@ -54,21 +69,20 @@ static void runner()
   computation_amounts = new double[hosts_count]();
   for (int i               = 0; i < hosts_count; i++)
     computation_amounts[i] = 1e9; // 1 Gflop
-  simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, nullptr /* no comm */);
+  simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts.data(), computation_amounts, nullptr /* no comm */);
 
   XBT_INFO("Then, build a parallel task with no computation nor communication (synchro only)");
   computation_amounts   = new double[hosts_count]();
   communication_amounts = new double[hosts_count * hosts_count]();
-  simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, communication_amounts);
+  simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts.data(), computation_amounts, communication_amounts);
 
-  XBT_INFO("Finally, trick the ptask to do a 'remote execution', on host %s", hosts[1]->getCname());
+  XBT_INFO("Finally, trick the ptask to do a 'remote execution', on host %s", hosts[1]->get_cname());
   computation_amounts = new double[1]{1e9};
 
   simgrid::s4u::Host* remote[] = {hosts[1]};
   simgrid::s4u::this_actor::parallel_execute(1, remote, computation_amounts, nullptr);
 
   XBT_INFO("Goodbye now!");
-  std::free(hosts);
 }
 
 int main(int argc, char* argv[])
@@ -81,10 +95,10 @@ int main(int argc, char* argv[])
   if (argc == 3 && argv[2][2] == 'e')
     sg_host_energy_plugin_init();
 
-  e.loadPlatform(argv[1]);
+  e.load_platform(argv[1]);
 
   /* Pick a process, no matter which, from the platform file */
-  simgrid::s4u::Actor::createActor("test", simgrid::s4u::Host::by_name("MyHost1"), runner);
+  simgrid::s4u::Actor::create("test", simgrid::s4u::Host::by_name("MyHost1"), runner);
 
   e.run();
   XBT_INFO("Simulation done.");