+void deployment_generator::distribute_load()
+{
+ using std::placeholders::_1;
+
+ if (!opt::auto_depl::random_distribution) {
+ set_load(0, opt::auto_depl::load);
+ return;
+ }
+ srand48(opt::auto_depl::random_seed);
+ std::vector<double> loads(hosts.size());
+ std::generate(loads.begin(), loads.end(), drand48);
+ double factor = opt::auto_depl::load /
+ std::accumulate(loads.begin(), loads.end(), 0.0);
+ std::transform(loads.begin(), loads.end(), loads.begin(),
+ std::bind(std::multiplies<double>(), _1, factor));
+ if (opt::integer_transfer) {
+ double iload;
+ double residue = 0.0;
+ unsigned i;
+ for (i = 0 ; i < hosts.size() - 1; ++i) {
+ if (residue < 0.0)
+ iload = floor(loads[i]);
+ else if (residue > 0.0)
+ iload = ceil(loads[i]);
+ else // residue == 0.0
+ iload = round(loads[i]);
+ residue += (loads[i] - iload);
+ loads[i] = iload;
+ }
+ // abs(round(...)) to avoid rounding errors, or a value of -0
+ iload = abs(round(loads[i] + residue)); // i == hosts.size() - 1
+ loads[i] = iload;
+ // final sanity check
+ xbt_assert(opt::auto_depl::load ==
+ std::accumulate(loads.begin(), loads.end(), 0.0));
+ }
+ for (unsigned i = 0 ; i < hosts.size() ; ++i)
+ set_load(i, loads[i]);
+}
+