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;
67 static int simulation_main(int argc, char* argv[])
72 proc = opt::loba_algorithms.new_instance(opt::loba_algo, argc, argv);
74 proc_mutex->acquire();
76 proc_mutex->release();
80 proc_mutex->acquire();
81 loads.push(proc->get_real_load());
82 comps.push(proc->get_comp_amount());
83 comp_iterations.push(proc->get_comp_iter());
84 all_comp_iterations.push(proc->get_all_comp_iter());
85 data_send_amount.push(proc->get_data_send_amount());
86 data_recv_amount.push(proc->get_data_recv_amount());
87 data_send_count.push(proc->get_data_send_count());
88 data_recv_count.push(proc->get_data_recv_count());
89 ctrl_send_amount.push(proc->get_ctrl_send_amount());
90 ctrl_recv_amount.push(proc->get_ctrl_recv_amount());
91 ctrl_send_count.push(proc->get_ctrl_send_count());
92 ctrl_recv_count.push(proc->get_ctrl_recv_count());
94 // Synchronization barrier...
95 // The goal is to circumvent a limitation in SimGrid (at least
96 // in version 3.5): a process must be alive when another one
97 // destroys a communication they had together.
100 proc_cond->broadcast();
101 while (proc_counter > 0)
102 proc_cond->wait(*proc_mutex);
103 proc_mutex->release();
107 catch (const std::invalid_argument& e) {
108 THROWF(arg_error, 0, "%s", e.what());
110 catch (const std::exception& e) {
111 THROWF(0, 0, "%s", e.what());
116 static bool check_for_lost_load()
119 double total_init = process::get_total_load_init();
120 double total_exit = process::get_total_load_exit();
121 double lost = total_init - total_exit;
122 double lost_ratio = 100.0 * lost / total_init;
123 if (lost_ratio < -opt::load_ratio_threshold) {
124 XBT_ERROR("Gained load at exit! %g (%g%%) <============",
127 } else if (lost_ratio > opt::load_ratio_threshold) {
128 XBT_ERROR("Lost load at exit! %g (%g%%) <============",
132 XBT_VERB("Total load at exit looks good: %g (%g%%)", lost, lost_ratio);
134 double total_running = process::get_total_load_running();
135 double running_ratio = 100.0 * total_running / total_init;
136 if (running_ratio < -opt::load_ratio_threshold) {
137 XBT_ERROR("Negative running load at exit! %g (%g%%) <============",
138 total_running, running_ratio);
140 } else if (running_ratio > opt::load_ratio_threshold) {
141 XBT_ERROR("Remaining running load at exit! %g (%g%%) <============",
142 total_running, running_ratio);
145 XBT_VERB("Running load at exit looks good: %g (%g%%)",
146 total_running, running_ratio);
150 static void signal_handler(int /*sig*/)
152 if (!opt::exit_request) {
153 XBT_CRITICAL(">>>>>>>>>>"
154 " caught CTRL-C: global exit requested "
156 opt::exit_request = 1;
158 XBT_CRITICAL(">>>>>>>>>>"
159 " caught CTRL-C for the 2nd time: exit immediately "
161 exit(EXIT_FAILURE_INTR);
165 static void install_signal_handler()
167 struct sigaction action;
168 action.sa_handler = signal_handler;
169 sigemptyset(&action.sa_mask);
170 action.sa_flags = SA_RESTART;
171 if (sigaction(SIGINT, &action, NULL) == -1) {
172 std::cerr << "sigaction: " << strerror(errno) << "\n";
173 exit(EXIT_FAILURE_OTHER);
177 #define PR_VALUE(descr, format, ...) \
178 XBT_INFO("| %.*s: " format, DATA_DESCR_WIDTH, \
179 descr ".................................................", \
182 #define PR_STATS(descr, st) \
183 XBT_INFO("| %.*s: %g / %g / %g", DATA_DESCR_WIDTH, \
184 descr " (total/avg./stddev).............................", \
185 st.get_sum(), st.get_mean(), st.get_stddev())
187 int main(int argc, char* argv[])
189 // Note: variables used after THROW must be declared as volatile.
190 volatile int exit_status = 0; // global exit status
191 volatile double simulated_time = -1.0;
192 timestamp elapsed_time(timestamp::wallclock_time);
193 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 // Note: MSG_global_init() may throw an exception, but it seems
213 // impossible to catch it correctly :-(
214 MSG_global_init(&argc, argv);
215 install_signal_handler();
217 // Parse global parameters
218 bool parse_res = opt::parse_args(&argc, argv);
220 || opt::version_requested || opt::help_requested) {
221 if (opt::version_requested)
222 std::clog << version::name << " (" << opt::program_name << ")"
223 << " version " << version::num << "\n"
224 << version::copyright << "\n"
225 "Compiled on " << version::date << "\n\n";
226 if (!parse_res || opt::help_requested)
229 exit(parse_res ? EXIT_NO_FAILURE : EXIT_FAILURE_ARGS);
231 XBT_INFO("%s v%s (%s)", opt::program_name.c_str(), version::num.c_str(),
232 version::date.c_str());
236 exit_status = EXIT_FAILURE_INIT; // =====
238 // Register the default function of an agent
239 // MSG_function_register("simulation_main", simulation_main);
240 MSG_function_register_default(simulation_main);
242 // Create the platform and the application.
243 XBT_DEBUG("Loading platform file...");
244 MSG_create_environment(opt::platform_file.c_str());
245 XBT_DEBUG("Creating hostdata...");
247 XBT_INFO("Loaded description of %zd hosts.", hostdata::size());
248 XBT_DEBUG("Deploying processes...");
249 if (opt::auto_depl::enabled) {
250 if (!opt::auto_depl::nhosts)
251 opt::auto_depl::nhosts = hostdata::size();
252 if (opt::auto_depl::nhosts > hostdata::size()) {
253 XBT_WARN("%u hosts is too much: limiting to %zu",
254 opt::auto_depl::nhosts, hostdata::size());
255 opt::auto_depl::nhosts = hostdata::size();
257 if (opt::auto_depl::load == 0.0) {
258 XBT_WARN("Initial load is zero! "
259 "Falling back on old behaviour (load = nhosts).");
260 opt::auto_depl::load = opt::auto_depl::nhosts;
261 } else if (opt::auto_depl::load < 0.0)
262 opt::auto_depl::load =
263 -opt::auto_depl::load * opt::auto_depl::nhosts;
264 double iload = std::trunc(opt::auto_depl::load);
265 if (opt::integer_transfer && opt::auto_depl::load != iload) {
266 XBT_WARN("Total load %g is not an integer. Truncate it.",
267 opt::auto_depl::load);
268 opt::auto_depl::load = iload;
270 MY_launch_application(); // it is already opt::* aware...
272 MSG_launch_application(opt::deployment_file.c_str());
275 // Register tracing categories
276 TRACE_category_with_color(TRACE_CAT_COMP, TRACE_COLOR_COMP);
277 TRACE_category_with_color(TRACE_CAT_CTRL, TRACE_COLOR_CTRL);
278 TRACE_category_with_color(TRACE_CAT_DATA, TRACE_COLOR_DATA);
280 exit_status = EXIT_FAILURE_SIMU; // =====
282 proc_mutex = new mutex_t();
283 proc_cond = new condition_t();
285 // Launch the MSG simulation.
286 XBT_INFO("Starting simulation at %f...", MSG_get_clock());
288 simulated_time = MSG_get_clock();
289 XBT_INFO("Simulation ended at %f.", simulated_time);
295 THROWF(0, 0, "MSG_main() failed with status %#x", res);
297 exit_status = EXIT_NO_FAILURE; // =====
300 int len = strlen(ex.msg);
301 if (len > 0 && ex.msg[len - 1] == '\n')
302 ex.msg[len - 1] = '\0'; // strip the ending '\n'
303 XBT_ERROR("%s", ex.msg);
304 XBT_DEBUG("Error from %s() in %s:%d", ex.func, ex.file, ex.line);
308 // Clean the MSG simulation.
312 XBT_ERROR("MSG_clean() failed with status %#x", res);
313 exit_status |= EXIT_FAILURE_CLEAN;
316 // Report final simulation status.
317 if (simulated_time >= 0.0) {
318 simulation_time.stop();
320 if (!check_for_lost_load())
321 exit_status |= EXIT_FAILURE_LOAD;
323 XBT_INFO(",----[ Results ]");
324 PR_STATS("Load", loads);
325 PR_STATS("Computation", comps);
326 PR_STATS("Comp. iterations", comp_iterations);
327 PR_STATS("X-Comp. iterations", all_comp_iterations);
328 PR_STATS("Data send amount", data_send_amount);
329 PR_STATS("Data recv amount", data_recv_amount);
330 PR_STATS("Data send count", data_send_count);
331 PR_STATS("Data recv count", data_recv_count);
332 PR_STATS("Ctrl send amount", ctrl_send_amount);
333 PR_STATS("Ctrl recv amount", ctrl_recv_amount);
334 PR_STATS("Ctrl send count", ctrl_send_count);
335 PR_STATS("Ctrl recv count", ctrl_recv_count);
336 PR_VALUE("Total simulated time", "%g", simulated_time);
337 PR_VALUE("Total simulation time", "%g", simulation_time.duration());
338 PR_VALUE("Elapsed (wall clock) time", "%g", elapsed_time.duration());
341 double load_imbalance = 100.0 * loads.get_stddev() / loads.get_mean();
342 double transfer_amount =
343 data_send_amount.get_sum() / opt::comm_cost(loads.get_sum());
345 XBT_INFO(",----[ Useful metrics ]");
346 PR_VALUE("Final load imbalance", "%g %s", load_imbalance,
347 "percent of the load average");
348 PR_VALUE("Data transfer amount", "%g %s", transfer_amount,
349 "times the total amount of data");
354 XBT_ERROR("Simulation failed (%#x).", exit_status);
356 XBT_INFO("Simulation succeeded.");