Define process::lb_load(), and use it.

[loba.git] / main.cpp

diff --git a/main.cpp b/main.cpp
index 3ee3ae1544ea3152b8ce4b8de5a32247442c80d7..907869eaad4aa4d2d517160d8648200a84e7198e 100644 (file)
--- a/main.cpp
+++ b/main.cpp
@@ -1,15 +1,13 @@
+#include <algorithm>
+#include <cmath>
 #include <cstring>
+#include <tr1/functional>
 #include <iostream>
+#include <numeric>
 #include <stdexcept>
+#include <vector>
 #include <msg/msg.h>
 #include <xbt/log.h>
-#include "deployment.h"
-#include "hostdata.h"
-#include "misc.h"
-#include "options.h"
-#include "process.h"
-#include "timer.h"
-#include "version.h"
 
 // Creates log categories
 XBT_LOG_NEW_CATEGORY(simu, "Root of simulation messages");
@@ -21,22 +19,37 @@ XBT_LOG_NEW_SUBCATEGORY(loba, simu, "Messages from load-balancer");
 
 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(main);
 
-// Failure exit status
-enum {
-    EXIT_NO_FAILURE    = 0x00,  // no error
-    EXIT_FAILURE_ARGS  = 0x01,  // bad arguments
-    EXIT_FAILURE_INIT  = 0x02,  // failed to initialize simulator
-    EXIT_FAILURE_SIMU  = 0x04,  // simulation failed
-    EXIT_FAILURE_CLEAN = 0x08,  // error at cleanup
-};
+#include "deployment.h"
+#include "hostdata.h"
+#include "misc.h"
+#include "options.h"
+#include "process.h"
+#include "timer.h"
+#include "version.h"
+
+namespace {
+    // Failure exit status
+    enum {
+        EXIT_NO_FAILURE    = 0x00,  // no error
+        EXIT_FAILURE_ARGS  = 0x01,  // bad arguments
+        EXIT_FAILURE_INIT  = 0x02,  // failed to initialize simulator
+        EXIT_FAILURE_SIMU  = 0x04,  // simulation failed
+        EXIT_FAILURE_CLEAN = 0x08,  // error at cleanup
+    };
+
+    std::vector<double> loads;
+    double load_stddev;
+    double load_avg;
+}
 
-int simulation_main(int argc, char* argv[])
+static int simulation_main(int argc, char* argv[])
 {
     int result;
     process* proc;
     try {
         proc = opt::loba_algorithms.new_instance(opt::loba_algo, argc, argv);
         result = proc->run();
+        loads.push_back(proc->get_load());
         delete proc;
     }
     catch (std::invalid_argument& e) {
@@ -45,23 +58,51 @@ int simulation_main(int argc, char* argv[])
     return result;
 }
 
-void check_for_lost_load()
+static void check_for_lost_load()
 {
-    const double threshold = 1e-4;
     double total_init = process::get_total_load_init();
+
     double total_exit = process::get_total_load_exit();
     double lost = total_init - total_exit;
-    double lost_ratio = 100 * lost / total_init;
-    if (lost_ratio < -threshold) {
+    double lost_ratio = 100.0 * lost / total_init;
+    if (lost_ratio < -opt::load_ratio_threshold)
         CRITICAL2("Gained load at exit! %g (%g%%) <============",
                   lost, lost_ratio);
-    } else if (lost_ratio > threshold) {
+    else if (lost_ratio > opt::load_ratio_threshold)
         CRITICAL2("Lost load at exit! %g (%g%%) <============",
                   lost, lost_ratio);
-    } else {
+    else
         DEBUG2("Total load at exit looks good: %g (%g%%)", lost, lost_ratio);
-    }
 
+    double total_running = process::get_total_load_running();
+    double running_ratio = 100.0 * total_running / total_init;
+    if (running_ratio < -opt::load_ratio_threshold)
+        CRITICAL2("Negative running load at exit! %g (%g%%) <============",
+                  total_running, running_ratio);
+    else if (running_ratio > opt::load_ratio_threshold)
+        CRITICAL2("Remaining running load at exit! %g (%g%%) <============",
+                  total_running, running_ratio);
+    else
+        DEBUG2("Running load at exit looks good: %g (%g%%)",
+               total_running, running_ratio);
+}
+
+static void compute_load_imbalance()
+{
+    using std::tr1::bind;
+    using std::tr1::placeholders::_1;
+
+    unsigned n = loads.size();
+    load_avg = std::accumulate(loads.begin(), loads.end(), 0.0) / n;
+
+    std::vector<double> diff(loads);
+    std::transform(diff.begin(), diff.end(), diff.begin(),
+                   bind(std::minus<double>(), _1, load_avg));
+    double epsilon = std::accumulate(diff.begin(), diff.end(), 0.0);
+    double square_sum = std::inner_product(diff.begin(), diff.end(),
+                                           diff.begin(), 0.0);
+    double variance = (square_sum - (epsilon * epsilon) / n) / n;
+    load_stddev = sqrt(variance);
 }
 
 int main(int argc, char* argv[])
@@ -92,7 +133,7 @@ int main(int argc, char* argv[])
     MSG_global_init(&argc, argv);
 
     // Parse global parameters
-    int parse_res = opt::parse_args(&argc, argv);
+    bool parse_res = opt::parse_args(&argc, argv);
     if (!parse_res
         || opt::version_requested || opt::help_requested) {
         if (opt::version_requested)
@@ -142,6 +183,7 @@ int main(int argc, char* argv[])
         simulated_time = MSG_get_clock();
         INFO1("Simulation ended at %f.", simulated_time);
         check_for_lost_load();
+        compute_load_imbalance();
         if (res != MSG_OK)
             THROW1(0, 0, "MSG_main() failed with status %#x", res);
 
@@ -168,8 +210,9 @@ int main(int argc, char* argv[])
     if (simulated_time >= 0.0) {
         simulation_time.stop();
         INFO0(",----[ Results ]");
-        INFO1("| Total simulated time...: %g", simulated_time);
-        INFO1("| Total simulation time..: %g", simulation_time.duration());
+        INFO2("| Load avg./stddev. at exit.: %g / %g", load_avg, load_stddev);
+        INFO1("| Total simulated time......: %g", simulated_time);
+        INFO1("| Total simulation time.....: %g", simulation_time.duration());
         INFO0("`----");
     }
     if (exit_status)