New function SMPI_app_instance_start() to easily start a MPI instance in your S4U...

[simgrid.git] / src / smpi / internals / smpi_deployment.cpp

diff --git a/src/smpi/internals/smpi_deployment.cpp b/src/smpi/internals/smpi_deployment.cpp
index 5e36060..d20de25 100644 (file)
--- a/src/smpi/internals/smpi_deployment.cpp
+++ b/src/smpi/internals/smpi_deployment.cpp
@@ -54,6 +54,24 @@ void SMPI_app_instance_register(const char *name, xbt_main_func_t code, int num_
 
   smpi_instances.try_emplace(name, num_processes);
 }
+void SMPI_app_instance_start(const char* name, const std::function<void()>& code,
+                             std::vector<simgrid::s4u::Host*> const& hosts)
+{
+  xbt_assert(hosts.size(), "Cannot start a SMPI instance on 0 hosts");
+  smpi_instances.try_emplace(name, hosts.size());
+
+  int rank = 0;
+  for (auto* host : hosts) {
+    auto rank_str          = std::to_string(rank);
+    std::string actor_name = std::string(name) + "#" + rank_str;
+    auto actor             = simgrid::s4u::Actor::create(actor_name, host, code);
+    actor->set_property("instance_id", name);
+    actor->set_property("rank", rank_str);
+    smpi_deployment_register_process(name, rank, actor.get());
+
+    rank++;
+  }
+}
 
 void smpi_deployment_register_process(const std::string& instance_id, int rank, const simgrid::s4u::Actor* actor)
 {