* under the terms of the license (GNU LGPL) which comes with this package. */
#include <simgrid/plugins/load_balancer.h>
-#include <simgrid/s4u/Actor.hpp>
+#include <simgrid/s4u.hpp>
#include <simgrid/smpi/replay.hpp>
+#include <smpi/smpi.h>
+#include <src/smpi/include/smpi_comm.hpp>
+#include <src/smpi/include/smpi_actor.hpp>
#include <xbt/replay.hpp>
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(plugin_load_balancer, surf, "Logging specific to the SMPI load balancing plugin");
+#include "src/kernel/activity/ExecImpl.hpp"
+#include "src/simix/ActorImpl.hpp"
+#include <simgrid/smpi/loadbalancer/load_balancer.hpp>
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(plugin_load_balancer, smpi, "Logging specific to the SMPI load balancing plugin");
+
+static simgrid::config::Flag<int> cfg_migration_frequency("smpi/plugin/lb/migration-frequency", {"smpi/plugin/lb/migration_frequency"},
+ "After how many calls to the migration function should the migration be actually executed?", 10,
+ [](double val){if (val != 10) sg_load_balancer_plugin_init();});
namespace simgrid {
namespace smpi {
namespace plugin {
+static simgrid::plugin::loadbalancer::LoadBalancer lb;
+
+class MigrateParser : public simgrid::smpi::replay::ActionArgParser {
+public:
+ double memory_consumption;
+ void parse(simgrid::xbt::ReplayAction& action, std::string name)
+ {
+ // The only parameter is the amount of memory used by the current process.
+ CHECK_ACTION_PARAMS(action, 1, 0);
+ memory_consumption = std::stod(action[2]);
+ }
+};
+
+/* This function simulates what happens when the original application calls
+ * (A)MPI_Migrate. It executes the load balancing heuristics, makes the necessary
+ * migrations and updates the task mapping in the load balancer.
+ */
+class MigrateAction : public simgrid::smpi::replay::ReplayAction<simgrid::smpi::plugin::MigrateParser> {
+public:
+ explicit MigrateAction() : ReplayAction("Migrate") {}
+ void kernel(simgrid::xbt::ReplayAction& action)
+ {
+ static std::map<simgrid::s4u::ActorPtr, int> migration_call_counter;
+ static simgrid::s4u::Barrier smpilb_bar(smpi_process_count());
+ simgrid::s4u::Host* cur_host = simgrid::s4u::this_actor::get_host();
+ simgrid::s4u::Host* migrate_to_host;
+
+ TRACE_migration_call(my_proc_id, NULL);
+
+ migration_call_counter[simgrid::s4u::Actor::self()]++;
+ if ((migration_call_counter[simgrid::s4u::Actor::self()] % simgrid::config::get_value<int>(cfg_migration_frequency.get_name())) != 0) {
+ return;
+ }
+
+ // TODO cheinrich: Why do we need this barrier?
+ smpilb_bar.wait();
+
+ static bool was_executed = false;
+ if (not was_executed) {
+ was_executed = true;
+ smpi_bench_begin();
+ XBT_INFO("RUNNING THE LB");
+ lb.run();
+ smpi_bench_end();
+ }
+
+ // This barrier is required to ensure that the mapping has been computed and is available
+ smpilb_bar.wait();
+ was_executed = false; // Must stay behind this barrier so that all processes have passed the if clause
+
+ migrate_to_host = lb.get_mapping();
+ if (cur_host != migrate_to_host) { // Origin and dest are not the same -> migrate
+ sg_host_t migration_hosts[2] = {cur_host, migrate_to_host};
+ // Changing this to double[2] ... will cause trouble with parallel_execute, because that fct is trying to call free().
+ double* comp_amount = new double[2]{0, 0};
+ double* comm_amount = new double[4]{0, std::max(args.memory_consumption, 1.0), 0, 0};
+ xbt_os_timer_t timer = smpi_process()->timer();
+ xbt_os_threadtimer_start(timer);
+ simgrid::s4u::this_actor::parallel_execute(2, migration_hosts, comp_amount, comm_amount, -1.0);
+ xbt_os_threadtimer_stop(timer);
+ smpi_execute(xbt_os_timer_elapsed(timer));
+
+ // Update the process and host mapping in SimGrid.
+ TRACE_smpi_process_change_host(my_proc_id, migrate_to_host);
+ simgrid::s4u::this_actor::migrate(migrate_to_host);
+ }
+
+ smpilb_bar.wait();
+
+ smpi_bench_begin();
+ }
+};
+
+/******************************************************************************
+ * Code to include the duration of iterations in the trace. *
+ ******************************************************************************/
+
+// FIXME Move declaration
+XBT_PRIVATE void action_iteration_in(simgrid::xbt::ReplayAction& action);
+void action_iteration_in(simgrid::xbt::ReplayAction& action)
+{
+ CHECK_ACTION_PARAMS(action, 0, 0)
+ TRACE_Iteration_in(simgrid::s4u::this_actor::get_pid(), nullptr);
+}
+
+// FIXME Move declaration
+XBT_PRIVATE void action_iteration_out(simgrid::xbt::ReplayAction& action);
+void action_iteration_out(simgrid::xbt::ReplayAction& action)
+{
+ CHECK_ACTION_PARAMS(action, 0, 0)
+ TRACE_Iteration_out(simgrid::s4u::this_actor::get_pid(), nullptr);
+}
}
}
}
*/
void sg_load_balancer_plugin_init()
{
+ static bool done = false;
+ if (!done) {
+ done = true;
+ simgrid::kernel::activity::ExecImpl::on_completion.connect([](simgrid::kernel::activity::ExecImplPtr activity){
+ simgrid::smpi::plugin::lb.record_actor_computation(activity->simcalls_.front()->issuer->iface(), activity->surf_action_->get_cost());
+ });
+
+ xbt_replay_action_register(
+ "migrate", [](simgrid::xbt::ReplayAction& action) { simgrid::smpi::plugin::MigrateAction().execute(action); });
+ xbt_replay_action_register("iteration_in", simgrid::smpi::plugin::action_iteration_in);
+ xbt_replay_action_register("iteration_out", simgrid::smpi::plugin::action_iteration_out);
+ }
}
