From: Martin Quinson <martin.quinson@loria.fr>
Date: Mon, 4 Dec 2017 23:25:48 +0000 (+0100)
Subject: improve that example so that it also demonstrates the prioritized executions
X-Git-Tag: v3.18~155
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/bd6f12a8267489592b5b55c5387b7cf49768b1b1

improve that example so that it also demonstrates the prioritized executions
---

diff --git a/examples/s4u/actor-execute/s4u-actor-execute.cpp b/examples/s4u/actor-execute/s4u-actor-execute.cpp
index 9fc417d823..eb90bed16c 100644
--- a/examples/s4u/actor-execute/s4u-actor-execute.cpp
+++ b/examples/s4u/actor-execute/s4u-actor-execute.cpp
@@ -5,16 +5,38 @@
 
 #include "simgrid/s4u.hpp"
 
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
+
 static int executor(std::vector<std::string> /*args*/)
 {
   /* 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(100);
+  simgrid::s4u::this_actor::execute(98095);
+  XBT_INFO("Done.");
 
   /* This simple example does not do anything beyond that */
   return 0;
 }
 
+static int privileged(std::vector<std::string> /*args*/)
+{
+  /* 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. */
+  return 0;
+}
+
 int main(int argc, char *argv[])
 {
   simgrid::s4u::Engine e(&argc, argv);
@@ -24,6 +46,7 @@ int main(int argc, char *argv[])
   e.loadPlatform(argv[1]);
 
   simgrid::s4u::Actor::createActor("executor", simgrid::s4u::Host::by_name("Tremblay"), executor, args);
+  simgrid::s4u::Actor::createActor("privileged", simgrid::s4u::Host::by_name("Tremblay"), privileged, args);
 
   e.run();
 
diff --git a/examples/s4u/actor-execute/s4u-actor-execute.tesh b/examples/s4u/actor-execute/s4u-actor-execute.tesh
index deba26ddf3..ba18fdef04 100644
--- a/examples/s4u/actor-execute/s4u-actor-execute.tesh
+++ b/examples/s4u/actor-execute/s4u-actor-execute.tesh
@@ -2,3 +2,5 @@
 
 p Start remote processes 
 $ $SG_TEST_EXENV ${bindir:=.}/s4u-actor-execute$EXEEXT ${platfdir}/small_platform.xml 
+> [Tremblay:privileged:(2) 0.001500] [s4u_test/INFO] Done.
+> [Tremblay:executor:(1) 0.002000] [s4u_test/INFO] Done.