gint master_run(Master* master) {
MAGIC_ASSERT(master);
message("loading and initializing simulation data");
/* start loading and initializing simulation data */
_master_loadConfiguration(master);
gboolean isSuccess = _master_loadTopology(master);
if(!isSuccess) {
return 1;
}
_master_initializeTimeWindows(master);
/* the master will be responsible for distributing the actions to the slaves so that
* they all have a consistent view of the simulation, topology, etc.
* For now we only have one slave so send it everything. */
guint slaveSeed = random_nextUInt(master->random);
master->slave = slave_new(master, master->options, master->endTime, slaveSeed);
message("registering plugins and hosts");
/* register the components needed by each slave.
* this must be done after slaves are available so we can send them messages */
_master_registerPlugins(master);
_master_registerHosts(master);
message("running simulation");
/* dont buffer log messages in debug mode */
if(options_getLogLevel(master->options) != LOGLEVEL_DEBUG) {
message("log message buffering is enabled for efficiency");
logger_setEnableBuffering(logger_getDefault(), TRUE);
}
/* start running each slave */
slave_run(master->slave);
/* only need to disable buffering if it was enabled, otherwise
* don't log the message as it may confuse the user. */
if(options_getLogLevel(master->options) != LOGLEVEL_DEBUG) {
message("log message buffering is disabled during cleanup");
logger_setEnableBuffering(logger_getDefault(), FALSE);
}
message("simulation finished, cleaning up now");
return slave_free(master->slave);
}
void master_run(Master* master) {
MAGIC_ASSERT(master);
guint slaveSeed = (guint)random_nextInt(master->random);
Slave* slave = slave_new(master, master->config, slaveSeed);
/* hook in our logging system. stack variable used to avoid errors
* during cleanup below. */
GLogLevelFlags configuredLogLevel = configuration_getLogLevel(master->config);
g_log_set_default_handler(logging_handleLog, &(configuredLogLevel));
GDateTime* dt_now = g_date_time_new_now_local();
gchar* dt_format = g_date_time_format(dt_now, "%F %H:%M:%S");
message("Shadow v%s initialized at %s using GLib v%u.%u.%u",
SHADOW_VERSION, dt_format, (guint)GLIB_MAJOR_VERSION, (guint)GLIB_MINOR_VERSION, (guint)GLIB_MICRO_VERSION);
g_date_time_unref(dt_now);
g_free(dt_format);
/* store parsed actions from each user-configured simulation script */
GQueue* actions = g_queue_new();
Parser* xmlParser = parser_new();
/* parse built-in examples, or input files */
gboolean success = TRUE;
if(master->config->runFileExample) {
GString* file = example_getFileExampleContents();
success = parser_parseContents(xmlParser, file->str, file->len, actions);
g_string_free(file, TRUE);
} else {
/* parse all given input XML files */
while(success && g_queue_get_length(master->config->inputXMLFilenames) > 0) {
GString* filename = g_queue_pop_head(master->config->inputXMLFilenames);
success = parser_parseFile(xmlParser, filename, actions);
}
}
parser_free(xmlParser);
/* if there was an error parsing, bounce out */
if(success) {
message("successfully parsed Shadow XML input!");
} else {
g_queue_free(actions);
error("error parsing Shadow XML input!");
}
/*
* loop through actions that were created from parsing. this will create
* all the nodes, networks, applications, etc., and add an application
* start event for each node to bootstrap the simulation. Note that the
* plug-in libraries themselves are not loaded until a worker needs it,
* since each worker will need its own private version.
*/
while(g_queue_get_length(actions) > 0) {
Action* a = g_queue_pop_head(actions);
runnable_run(a);
runnable_free(a);
}
g_queue_free(actions);
/* start running */
gint nWorkers = configuration_getNWorkerThreads(master->config);
debug("starting %i-threaded engine (main + %i workers)", (nWorkers + 1), nWorkers);
/* simulation mode depends on configured number of workers */
if(nWorkers > 0) {
/* multi threaded, manage the other workers */
master->executeWindowStart = 0;
SimulationTime jump = master_getMinTimeJump(master);
master->executeWindowEnd = jump;
master->nextMinJumpTime = jump;
slave_runParallel(slave);
} else {
/* single threaded, we are the only worker */
master->executeWindowStart = 0;
master->executeWindowEnd = G_MAXUINT64;
slave_runSerial(slave);
}
debug("engine finished, cleaning up...");
slave_free(slave);
}
