4 #include <cstring> // strchr
10 // Creates log categories
11 XBT_LOG_NEW_CATEGORY(simu, "Root of simulation messages");
12 XBT_LOG_NEW_SUBCATEGORY(main, simu, "Messages from global infrastructure");
13 XBT_LOG_NEW_SUBCATEGORY(depl, main, "Messages from auto deployment");
14 XBT_LOG_NEW_SUBCATEGORY(comm, simu, "Messages from asynchronous pipes");
15 XBT_LOG_NEW_SUBCATEGORY(proc, simu, "Messages from base process class");
16 XBT_LOG_NEW_SUBCATEGORY(loba, simu, "Messages from load-balancer");
17 XBT_LOG_NEW_SUBCATEGORY(thrd, simu, "Messages from thread wrapper class");
19 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(main);
21 #include "deployment.h"
26 #include "statistics.h"
32 #define DATA_DESCR_WIDTH 39
35 // Failure exit status
37 EXIT_NO_FAILURE = 0x00, // no error
38 EXIT_FAILURE_ARGS = 0x01, // bad arguments
39 EXIT_FAILURE_INIT = 0x02, // failed to initialize simulator
40 EXIT_FAILURE_SIMU = 0x04, // simulation failed
41 EXIT_FAILURE_CLEAN = 0x08, // error at cleanup
42 EXIT_FAILURE_INTR = 0x10, // interrupted by user
43 EXIT_FAILURE_LOAD = 0x20, // lost load on exit
44 EXIT_FAILURE_OTHER = 0x40, // other error
47 // Cannot be globally initialized...
49 condition_t* proc_cond;
50 unsigned proc_counter = 0;
54 statistics comp_iterations;
55 statistics all_comp_iterations;
56 statistics iter_deviation;
57 statistics data_send_amount;
58 statistics data_recv_amount;
59 statistics data_send_count;
60 statistics data_recv_count;
61 statistics ctrl_send_amount;
62 statistics ctrl_recv_amount;
63 statistics ctrl_send_count;
64 statistics ctrl_recv_count;
65 statistics idle_duration;
66 statistics convergence;
70 static int simulation_main(int argc, char* argv[])
75 proc = opt::loba_algorithms.new_instance(opt::loba_algo, argc, argv);
77 proc_mutex->acquire();
79 proc_mutex->release();
83 proc_mutex->acquire();
84 loads.push(proc->get_real_load());
85 comps.push(proc->get_comp_amount());
86 comp_iterations.push(proc->get_comp_iter());
87 all_comp_iterations.push(proc->get_all_comp_iter());
88 iter_deviation.push(proc->get_iter_deviation());
89 data_send_amount.push(proc->get_data_send_amount());
90 data_recv_amount.push(proc->get_data_recv_amount());
91 data_send_count.push(proc->get_data_send_count());
92 data_recv_count.push(proc->get_data_recv_count());
93 ctrl_send_amount.push(proc->get_ctrl_send_amount());
94 ctrl_recv_amount.push(proc->get_ctrl_recv_amount());
95 ctrl_send_count.push(proc->get_ctrl_send_count());
96 ctrl_recv_count.push(proc->get_ctrl_recv_count());
97 idle_duration.push(proc->get_idle_duration());
98 double c = proc->get_convergence();
102 // Synchronization barrier...
103 // The goal is to circumvent a limitation in SimGrid (at least
104 // in version 3.5): a process must be alive when another one
105 // destroys a communication they had together.
108 proc_cond->broadcast();
109 while (proc_counter > 0)
110 proc_cond->wait(*proc_mutex);
111 proc_mutex->release();
118 static bool check_for_lost_load()
121 double total_init = process::get_total_load_init();
122 double total_exit = process::get_total_load_exit();
123 double lost = total_init - total_exit;
124 double lost_ratio = 100.0 * lost / total_init;
125 if (lost_ratio < -opt::load_ratio_threshold) {
126 XBT_ERROR("Gained load at exit! %g (%g%%) <============",
129 } else if (lost_ratio > opt::load_ratio_threshold) {
130 XBT_ERROR("Lost load at exit! %g (%g%%) <============",
134 XBT_VERB("Total load at exit looks good: %g (%g%%)", lost, lost_ratio);
136 double total_running = process::get_total_load_running();
137 double running_ratio = 100.0 * total_running / total_init;
138 if (running_ratio < -opt::load_ratio_threshold) {
139 XBT_ERROR("Negative running load at exit! %g (%g%%) <============",
140 total_running, running_ratio);
142 } else if (running_ratio > opt::load_ratio_threshold) {
143 XBT_ERROR("Remaining running load at exit! %g (%g%%) <============",
144 total_running, running_ratio);
147 XBT_VERB("Running load at exit looks good: %g (%g%%)",
148 total_running, running_ratio);
152 static void signal_handler(int /*sig*/)
154 if (!opt::exit_request) {
155 XBT_CRITICAL(">>>>>>>>>>"
156 " caught CTRL-C: global exit requested "
158 opt::exit_request = 1;
160 XBT_CRITICAL(">>>>>>>>>>"
161 " caught CTRL-C for the 2nd time: exit immediately "
163 exit(EXIT_FAILURE_INTR);
167 static void install_signal_handler()
169 struct sigaction action;
170 action.sa_handler = signal_handler;
171 sigemptyset(&action.sa_mask);
172 action.sa_flags = SA_RESTART;
173 if (sigaction(SIGINT, &action, NULL) == -1) {
174 std::cerr << "sigaction: " << strerror(errno) << "\n";
175 exit(EXIT_FAILURE_OTHER);
179 #define PR_VALUE(descr, format, ...) \
180 XBT_INFO("| %.*s: " format, DATA_DESCR_WIDTH, \
181 descr ".................................................", \
184 #define PR_STATS(descr, st) \
185 XBT_INFO("| %.*s: %g / %g / %g", DATA_DESCR_WIDTH, \
186 descr " (sum/avg/dev)...................................", \
187 st.get_sum(), st.get_mean(), st.get_stddev())
189 int main(int argc, char* argv[])
191 int exit_status = 0; // global exit status
192 double simulated_time = -1.0;
193 timestamp elapsed_time(timestamp::wallclock_time);
194 timestamp simulation_time(timestamp::cpu_time);
197 elapsed_time.start();
198 simulation_time.start();
200 // Set default logging parameters
201 bool do_log_control_set = true;
202 for (int i = 1 ; do_log_control_set && i < argc ; i++)
203 do_log_control_set = !(argv[i][0] == '-' && argv[i][1] != '-' &&
204 strchr(argv[i] + 1, 'v'));
205 if (do_log_control_set) {
206 // xbt_log_control_set("simu.thres:verbose");
207 xbt_log_control_set("simu.fmt:'[%h %r] [%c/%p] %m%n'");
208 xbt_log_control_set("main.fmt:'[%c/%p] %m%n'");
211 // Initialize some MSG internal data.
212 MSG_global_init(&argc, argv);
213 install_signal_handler();
215 // Parse global parameters
216 bool parse_res = opt::parse_args(&argc, argv);
218 || opt::version_requested || opt::help_requested) {
219 if (opt::version_requested)
220 std::clog << version::name << " (" << opt::program_name << ")"
221 << " version " << version::num << "\n"
222 << version::copyright << "\n"
223 "Compiled on " << version::date << "\n\n";
224 if (!parse_res || opt::help_requested)
227 exit(parse_res ? EXIT_NO_FAILURE : EXIT_FAILURE_ARGS);
229 XBT_INFO("%s v%s (%s)", opt::program_name.c_str(), version::num.c_str(),
230 version::date.c_str());
233 // Register the default function of an agent
234 // MSG_function_register("simulation_main", simulation_main);
235 MSG_function_register_default(simulation_main);
237 // Create the platform and the application.
238 XBT_DEBUG("Loading platform file...");
239 MSG_create_environment(opt::platform_file.c_str());
240 XBT_DEBUG("Creating hostdata...");
242 XBT_INFO("Loaded description of %zd hosts.", hostdata::size());
243 XBT_DEBUG("Deploying processes...");
244 if (opt::auto_depl::enabled) {
245 if (!opt::auto_depl::nhosts)
246 opt::auto_depl::nhosts = hostdata::size();
247 if (opt::auto_depl::nhosts > hostdata::size()) {
248 XBT_WARN("%u hosts is too much: limiting to %zu",
249 opt::auto_depl::nhosts, hostdata::size());
250 opt::auto_depl::nhosts = hostdata::size();
252 if (opt::auto_depl::load == 0.0) {
253 XBT_WARN("Initial load is zero! "
254 "Falling back on old behaviour (load = nhosts).");
255 opt::auto_depl::load = opt::auto_depl::nhosts;
256 } else if (opt::auto_depl::load < 0.0)
257 opt::auto_depl::load =
258 -opt::auto_depl::load * opt::auto_depl::nhosts;
259 double iload = std::trunc(opt::auto_depl::load);
260 if (opt::integer_transfer && opt::auto_depl::load != iload) {
261 XBT_WARN("Total load %g is not an integer. Truncate it.",
262 opt::auto_depl::load);
263 opt::auto_depl::load = iload;
265 MY_launch_application(); // it is already opt::* aware...
267 MSG_launch_application(opt::deployment_file.c_str());
270 // Register tracing categories
271 TRACE_category_with_color(TRACE_CAT_COMP, TRACE_COLOR_COMP);
272 TRACE_category_with_color(TRACE_CAT_CTRL, TRACE_COLOR_CTRL);
273 TRACE_category_with_color(TRACE_CAT_DATA, TRACE_COLOR_DATA);
275 proc_mutex = new mutex_t();
276 proc_cond = new condition_t();
277 process::set_proc_mutex(proc_mutex);
279 // Launch the MSG simulation.
280 XBT_INFO("Starting simulation at %f...", MSG_get_clock());
282 simulated_time = MSG_get_clock();
283 XBT_INFO("Simulation ended at %f.", simulated_time);
285 process::set_proc_mutex(NULL);
290 exit_status = EXIT_NO_FAILURE;
292 XBT_ERROR("MSG_main() failed with status %#x", res);
293 exit_status = EXIT_FAILURE_SIMU;
296 // Clean the MSG simulation.
300 XBT_ERROR("MSG_clean() failed with status %#x", res);
301 exit_status |= EXIT_FAILURE_CLEAN;
304 // Report final simulation status.
305 if (simulated_time >= 0.0) {
306 simulation_time.stop();
308 if (!check_for_lost_load())
309 exit_status |= EXIT_FAILURE_LOAD;
311 XBT_INFO(",----[ Results ]");
312 PR_STATS("Load", loads);
313 PR_STATS("Computation", comps);
314 PR_STATS("Comp. iterations", comp_iterations);
315 PR_STATS("X-Comp. iterations", all_comp_iterations);
316 PR_STATS("Data send amount", data_send_amount);
317 PR_STATS("Data recv amount", data_recv_amount);
318 PR_STATS("Data send count", data_send_count);
319 PR_STATS("Data recv count", data_recv_count);
320 PR_STATS("Ctrl send amount", ctrl_send_amount);
321 PR_STATS("Ctrl recv amount", ctrl_recv_amount);
322 PR_STATS("Ctrl send count", ctrl_send_count);
323 PR_STATS("Ctrl recv count", ctrl_recv_count);
324 PR_VALUE("Total simulated time", "%g", simulated_time);
325 PR_VALUE("Total simulation time", "%g", simulation_time.duration());
326 PR_VALUE("Elapsed (wall clock) time", "%g", elapsed_time.duration());
329 double load_imbalance = 100.0 * loads.get_stddev() / loads.get_mean();
330 double transfer_amount =
331 data_send_amount.get_sum() / opt::comm_cost(loads.get_sum());
333 XBT_INFO(",----[ Useful metrics ]");
334 PR_VALUE("Final load imbalance", "%g %s", load_imbalance,
335 "percent of the load average");
336 PR_VALUE("Data transfer amount", "%g %s", transfer_amount,
337 "times the total amount of data");
338 PR_VALUE("Number of hosts that converged", "%u / %u",
339 convergence.get_count(), loads.get_count());
340 PR_VALUE("Times of convergence (min/max/avg/dev)", "%g / %g / %g / %g",
341 convergence.get_min(), convergence.get_max(),
342 convergence.get_mean(), convergence.get_stddev());
343 PR_STATS("Idle duration", idle_duration);
344 PR_STATS("Supernumer. comp. iter.", iter_deviation);
349 XBT_ERROR("Simulation failed (%#x).", exit_status);
351 XBT_INFO("Simulation succeeded.");