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 data_send_amount;
57 statistics data_recv_amount;
58 statistics data_send_count;
59 statistics data_recv_count;
60 statistics ctrl_send_amount;
61 statistics ctrl_recv_amount;
62 statistics ctrl_send_count;
63 statistics ctrl_recv_count;
64 statistics convergence;
68 static int simulation_main(int argc, char* argv[])
73 proc = opt::loba_algorithms.new_instance(opt::loba_algo, argc, argv);
75 proc_mutex->acquire();
77 proc_mutex->release();
81 proc_mutex->acquire();
82 loads.push(proc->get_real_load());
83 comps.push(proc->get_comp_amount());
84 comp_iterations.push(proc->get_comp_iter());
85 all_comp_iterations.push(proc->get_all_comp_iter());
86 data_send_amount.push(proc->get_data_send_amount());
87 data_recv_amount.push(proc->get_data_recv_amount());
88 data_send_count.push(proc->get_data_send_count());
89 data_recv_count.push(proc->get_data_recv_count());
90 ctrl_send_amount.push(proc->get_ctrl_send_amount());
91 ctrl_recv_amount.push(proc->get_ctrl_recv_amount());
92 ctrl_send_count.push(proc->get_ctrl_send_count());
93 ctrl_recv_count.push(proc->get_ctrl_recv_count());
94 double c = proc->get_convergence();
98 // Synchronization barrier...
99 // The goal is to circumvent a limitation in SimGrid (at least
100 // in version 3.5): a process must be alive when another one
101 // destroys a communication they had together.
104 proc_cond->broadcast();
105 while (proc_counter > 0)
106 proc_cond->wait(*proc_mutex);
107 proc_mutex->release();
111 catch (const std::invalid_argument& e) {
112 THROWF(arg_error, 0, "%s", e.what());
114 catch (const std::exception& e) {
115 THROWF(0, 0, "%s", e.what());
120 static bool check_for_lost_load()
123 double total_init = process::get_total_load_init();
124 double total_exit = process::get_total_load_exit();
125 double lost = total_init - total_exit;
126 double lost_ratio = 100.0 * lost / total_init;
127 if (lost_ratio < -opt::load_ratio_threshold) {
128 XBT_ERROR("Gained load at exit! %g (%g%%) <============",
131 } else if (lost_ratio > opt::load_ratio_threshold) {
132 XBT_ERROR("Lost load at exit! %g (%g%%) <============",
136 XBT_VERB("Total load at exit looks good: %g (%g%%)", lost, lost_ratio);
138 double total_running = process::get_total_load_running();
139 double running_ratio = 100.0 * total_running / total_init;
140 if (running_ratio < -opt::load_ratio_threshold) {
141 XBT_ERROR("Negative running load at exit! %g (%g%%) <============",
142 total_running, running_ratio);
144 } else if (running_ratio > opt::load_ratio_threshold) {
145 XBT_ERROR("Remaining running load at exit! %g (%g%%) <============",
146 total_running, running_ratio);
149 XBT_VERB("Running load at exit looks good: %g (%g%%)",
150 total_running, running_ratio);
154 static void signal_handler(int /*sig*/)
156 if (!opt::exit_request) {
157 XBT_CRITICAL(">>>>>>>>>>"
158 " caught CTRL-C: global exit requested "
160 opt::exit_request = 1;
162 XBT_CRITICAL(">>>>>>>>>>"
163 " caught CTRL-C for the 2nd time: exit immediately "
165 exit(EXIT_FAILURE_INTR);
169 static void install_signal_handler()
171 struct sigaction action;
172 action.sa_handler = signal_handler;
173 sigemptyset(&action.sa_mask);
174 action.sa_flags = SA_RESTART;
175 if (sigaction(SIGINT, &action, NULL) == -1) {
176 std::cerr << "sigaction: " << strerror(errno) << "\n";
177 exit(EXIT_FAILURE_OTHER);
181 #define PR_VALUE(descr, format, ...) \
182 XBT_INFO("| %.*s: " format, DATA_DESCR_WIDTH, \
183 descr ".................................................", \
186 #define PR_STATS(descr, st) \
187 XBT_INFO("| %.*s: %g / %g / %g", DATA_DESCR_WIDTH, \
188 descr " (total/avg./stddev).............................", \
189 st.get_sum(), st.get_mean(), st.get_stddev())
191 int main(int argc, char* argv[])
193 // Note: variables used after THROW must be declared as volatile.
194 volatile int exit_status = 0; // global exit status
195 volatile double simulated_time = -1.0;
196 timestamp elapsed_time(timestamp::wallclock_time);
197 timestamp simulation_time(timestamp::cpu_time);
201 elapsed_time.start();
202 simulation_time.start();
204 // Set default logging parameters
205 bool do_log_control_set = true;
206 for (int i = 1 ; do_log_control_set && i < argc ; i++)
207 do_log_control_set = !(argv[i][0] == '-' && argv[i][1] != '-' &&
208 strchr(argv[i] + 1, 'v'));
209 if (do_log_control_set) {
210 // xbt_log_control_set("simu.thres:verbose");
211 xbt_log_control_set("simu.fmt:'[%h %r] [%c/%p] %m%n'");
212 xbt_log_control_set("main.fmt:'[%c/%p] %m%n'");
215 // Initialize some MSG internal data.
216 // Note: MSG_global_init() may throw an exception, but it seems
217 // impossible to catch it correctly :-(
218 MSG_global_init(&argc, argv);
219 install_signal_handler();
221 // Parse global parameters
222 bool parse_res = opt::parse_args(&argc, argv);
224 || opt::version_requested || opt::help_requested) {
225 if (opt::version_requested)
226 std::clog << version::name << " (" << opt::program_name << ")"
227 << " version " << version::num << "\n"
228 << version::copyright << "\n"
229 "Compiled on " << version::date << "\n\n";
230 if (!parse_res || opt::help_requested)
233 exit(parse_res ? EXIT_NO_FAILURE : EXIT_FAILURE_ARGS);
235 XBT_INFO("%s v%s (%s)", opt::program_name.c_str(), version::num.c_str(),
236 version::date.c_str());
240 exit_status = EXIT_FAILURE_INIT; // =====
242 // Register the default function of an agent
243 // MSG_function_register("simulation_main", simulation_main);
244 MSG_function_register_default(simulation_main);
246 // Create the platform and the application.
247 XBT_DEBUG("Loading platform file...");
248 MSG_create_environment(opt::platform_file.c_str());
249 XBT_DEBUG("Creating hostdata...");
251 XBT_INFO("Loaded description of %zd hosts.", hostdata::size());
252 XBT_DEBUG("Deploying processes...");
253 if (opt::auto_depl::enabled) {
254 if (!opt::auto_depl::nhosts)
255 opt::auto_depl::nhosts = hostdata::size();
256 if (opt::auto_depl::nhosts > hostdata::size()) {
257 XBT_WARN("%u hosts is too much: limiting to %zu",
258 opt::auto_depl::nhosts, hostdata::size());
259 opt::auto_depl::nhosts = hostdata::size();
261 if (opt::auto_depl::load == 0.0) {
262 XBT_WARN("Initial load is zero! "
263 "Falling back on old behaviour (load = nhosts).");
264 opt::auto_depl::load = opt::auto_depl::nhosts;
265 } else if (opt::auto_depl::load < 0.0)
266 opt::auto_depl::load =
267 -opt::auto_depl::load * opt::auto_depl::nhosts;
268 double iload = std::trunc(opt::auto_depl::load);
269 if (opt::integer_transfer && opt::auto_depl::load != iload) {
270 XBT_WARN("Total load %g is not an integer. Truncate it.",
271 opt::auto_depl::load);
272 opt::auto_depl::load = iload;
274 MY_launch_application(); // it is already opt::* aware...
276 MSG_launch_application(opt::deployment_file.c_str());
279 // Register tracing categories
280 TRACE_category_with_color(TRACE_CAT_COMP, TRACE_COLOR_COMP);
281 TRACE_category_with_color(TRACE_CAT_CTRL, TRACE_COLOR_CTRL);
282 TRACE_category_with_color(TRACE_CAT_DATA, TRACE_COLOR_DATA);
284 exit_status = EXIT_FAILURE_SIMU; // =====
286 proc_mutex = new mutex_t();
287 proc_cond = new condition_t();
289 // Launch the MSG simulation.
290 XBT_INFO("Starting simulation at %f...", MSG_get_clock());
292 simulated_time = MSG_get_clock();
293 XBT_INFO("Simulation ended at %f.", simulated_time);
299 THROWF(0, 0, "MSG_main() failed with status %#x", res);
301 exit_status = EXIT_NO_FAILURE; // =====
304 int len = strlen(ex.msg);
305 if (len > 0 && ex.msg[len - 1] == '\n')
306 ex.msg[len - 1] = '\0'; // strip the ending '\n'
307 XBT_ERROR("%s", ex.msg);
308 XBT_DEBUG("Error from %s() in %s:%d", ex.func, ex.file, ex.line);
312 // Clean the MSG simulation.
316 XBT_ERROR("MSG_clean() failed with status %#x", res);
317 exit_status |= EXIT_FAILURE_CLEAN;
320 // Report final simulation status.
321 if (simulated_time >= 0.0) {
322 simulation_time.stop();
324 if (!check_for_lost_load())
325 exit_status |= EXIT_FAILURE_LOAD;
327 XBT_INFO(",----[ Results ]");
328 PR_STATS("Load", loads);
329 PR_STATS("Computation", comps);
330 PR_STATS("Comp. iterations", comp_iterations);
331 PR_STATS("X-Comp. iterations", all_comp_iterations);
332 PR_STATS("Data send amount", data_send_amount);
333 PR_STATS("Data recv amount", data_recv_amount);
334 PR_STATS("Data send count", data_send_count);
335 PR_STATS("Data recv count", data_recv_count);
336 PR_STATS("Ctrl send amount", ctrl_send_amount);
337 PR_STATS("Ctrl recv amount", ctrl_recv_amount);
338 PR_STATS("Ctrl send count", ctrl_send_count);
339 PR_STATS("Ctrl recv count", ctrl_recv_count);
340 PR_VALUE("Total simulated time", "%g", simulated_time);
341 PR_VALUE("Total simulation time", "%g", simulation_time.duration());
342 PR_VALUE("Elapsed (wall clock) time", "%g", elapsed_time.duration());
345 double load_imbalance = 100.0 * loads.get_stddev() / loads.get_mean();
346 double transfer_amount =
347 data_send_amount.get_sum() / opt::comm_cost(loads.get_sum());
349 XBT_INFO(",----[ Useful metrics ]");
350 PR_VALUE("Final load imbalance", "%g %s", load_imbalance,
351 "percent of the load average");
352 PR_VALUE("Data transfer amount", "%g %s", transfer_amount,
353 "times the total amount of data");
354 PR_VALUE("Number of hosts that converged", "%u / %u",
355 convergence.get_count(), loads.get_count());
356 PR_VALUE("Times of convergence (min/max)", "%g / %g",
357 convergence.get_min(), convergence.get_max());
362 XBT_ERROR("Simulation failed (%#x).", exit_status);
364 XBT_INFO("Simulation succeeded.");