+#include <cerrno>
#include <cmath>
-#include <cstring>
+#include <csignal>
+#include <cstring> // strchr
#include <iostream>
-#include <numeric>
#include <stdexcept>
-#include <vector>
#include <msg/msg.h>
#include <xbt/log.h>
XBT_LOG_NEW_SUBCATEGORY(comm, simu, "Messages from asynchronous pipes");
XBT_LOG_NEW_SUBCATEGORY(proc, simu, "Messages from base process class");
XBT_LOG_NEW_SUBCATEGORY(loba, simu, "Messages from load-balancer");
+XBT_LOG_NEW_SUBCATEGORY(thrd, simu, "Messages from thread wrapper class");
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(main);
#include "misc.h"
#include "options.h"
#include "process.h"
+#include "statistics.h"
+#include "synchro.h"
#include "timer.h"
+#include "tracing.h"
#include "version.h"
+#define DATA_DESCR_WIDTH 39
+
namespace {
// Failure exit status
enum {
EXIT_FAILURE_INIT = 0x02, // failed to initialize simulator
EXIT_FAILURE_SIMU = 0x04, // simulation failed
EXIT_FAILURE_CLEAN = 0x08, // error at cleanup
+ EXIT_FAILURE_INTR = 0x10, // interrupted by user
+ EXIT_FAILURE_LOAD = 0x20, // lost load on exit
+ EXIT_FAILURE_OTHER = 0x40, // other error
};
- std::vector<double> loads;
- double load_stddev;
- double load_avg;
+ // Cannot be globally initialized...
+ mutex_t* proc_mutex;
+ condition_t* proc_cond;
+ unsigned proc_counter = 0;
+
+ statistics loads;
+ statistics comps;
+ statistics comp_iterations;
+ statistics all_comp_iterations;
+ statistics data_send_amount;
+ statistics data_recv_amount;
+ statistics data_send_count;
+ statistics data_recv_count;
+ statistics ctrl_send_amount;
+ statistics ctrl_recv_amount;
+ statistics ctrl_send_count;
+ statistics ctrl_recv_count;
+ statistics idle_duration;
+ statistics convergence;
+
}
static int simulation_main(int argc, char* argv[])
process* proc;
try {
proc = opt::loba_algorithms.new_instance(opt::loba_algo, argc, argv);
+
+ proc_mutex->acquire();
+ ++proc_counter;
+ proc_mutex->release();
+
result = proc->run();
- loads.push_back(proc->get_load());
+
+ proc_mutex->acquire();
+ loads.push(proc->get_real_load());
+ comps.push(proc->get_comp_amount());
+ comp_iterations.push(proc->get_comp_iter());
+ all_comp_iterations.push(proc->get_all_comp_iter());
+ data_send_amount.push(proc->get_data_send_amount());
+ data_recv_amount.push(proc->get_data_recv_amount());
+ data_send_count.push(proc->get_data_send_count());
+ data_recv_count.push(proc->get_data_recv_count());
+ ctrl_send_amount.push(proc->get_ctrl_send_amount());
+ ctrl_recv_amount.push(proc->get_ctrl_recv_amount());
+ ctrl_send_count.push(proc->get_ctrl_send_count());
+ ctrl_recv_count.push(proc->get_ctrl_recv_count());
+ idle_duration.push(proc->get_idle_duration());
+ double c = proc->get_convergence();
+ if (c != -1.0)
+ convergence.push(c);
+
+ // Synchronization barrier...
+ // The goal is to circumvent a limitation in SimGrid (at least
+ // in version 3.5): a process must be alive when another one
+ // destroys a communication they had together.
+
+ --proc_counter;
+ proc_cond->broadcast();
+ while (proc_counter > 0)
+ proc_cond->wait(*proc_mutex);
+ proc_mutex->release();
+
delete proc;
}
- catch (std::invalid_argument& e) {
- THROW1(arg_error, 0, "%s", e.what());
+ catch (const std::invalid_argument& e) {
+ THROWF(arg_error, 0, "%s", e.what());
+ }
+ catch (const std::exception& e) {
+ THROWF(0, 0, "%s", e.what());
}
return result;
}
-static void check_for_lost_load()
+static bool check_for_lost_load()
{
+ bool res = true;
double total_init = process::get_total_load_init();
-
double total_exit = process::get_total_load_exit();
double lost = total_init - total_exit;
double lost_ratio = 100.0 * lost / total_init;
- if (lost_ratio < -opt::load_ratio_threshold)
- CRITICAL2("Gained load at exit! %g (%g%%) <============",
- lost, lost_ratio);
- else if (lost_ratio > opt::load_ratio_threshold)
- CRITICAL2("Lost load at exit! %g (%g%%) <============",
+ if (lost_ratio < -opt::load_ratio_threshold) {
+ XBT_ERROR("Gained load at exit! %g (%g%%) <============",
+ -lost, -lost_ratio);
+ res = false;
+ } else if (lost_ratio > opt::load_ratio_threshold) {
+ XBT_ERROR("Lost load at exit! %g (%g%%) <============",
lost, lost_ratio);
- else
- DEBUG2("Total load at exit looks good: %g (%g%%)", lost, lost_ratio);
+ res = false;
+ } else
+ XBT_VERB("Total load at exit looks good: %g (%g%%)", lost, lost_ratio);
double total_running = process::get_total_load_running();
double running_ratio = 100.0 * total_running / total_init;
- if (running_ratio < -opt::load_ratio_threshold)
- CRITICAL2("Negative running load at exit! %g (%g%%) <============",
+ if (running_ratio < -opt::load_ratio_threshold) {
+ XBT_ERROR("Negative running load at exit! %g (%g%%) <============",
total_running, running_ratio);
- else if (running_ratio > opt::load_ratio_threshold)
- CRITICAL2("Remaining running load at exit! %g (%g%%) <============",
+ res = false;
+ } else if (running_ratio > opt::load_ratio_threshold) {
+ XBT_ERROR("Remaining running load at exit! %g (%g%%) <============",
total_running, running_ratio);
- else
- DEBUG2("Running load at exit looks good: %g (%g%%)",
- total_running, running_ratio);
+ res = false;
+ } else
+ XBT_VERB("Running load at exit looks good: %g (%g%%)",
+ total_running, running_ratio);
+ return res;
}
-static void compute_load_imbalance()
+static void signal_handler(int /*sig*/)
{
- unsigned n = loads.size();
- load_avg = std::accumulate(loads.begin(), loads.end(), 0.0) / n;
- double variance = 0.0;
- double epsilon = 0.0;
- for (unsigned i = 0 ; i < n ; ++i) {
- double diff = loads[i] - load_avg;
- variance += diff * diff;
- epsilon += diff;
+ if (!opt::exit_request) {
+ XBT_CRITICAL(">>>>>>>>>>"
+ " caught CTRL-C: global exit requested "
+ "<<<<<<<<<<");
+ opt::exit_request = 1;
+ } else {
+ XBT_CRITICAL(">>>>>>>>>>"
+ " caught CTRL-C for the 2nd time: exit immediately "
+ "<<<<<<<<<<");
+ exit(EXIT_FAILURE_INTR);
}
- variance = (variance - (epsilon * epsilon) / n) / n;
- load_stddev = sqrt(variance);
}
+static void install_signal_handler()
+{
+ struct sigaction action;
+ action.sa_handler = signal_handler;
+ sigemptyset(&action.sa_mask);
+ action.sa_flags = SA_RESTART;
+ if (sigaction(SIGINT, &action, NULL) == -1) {
+ std::cerr << "sigaction: " << strerror(errno) << "\n";
+ exit(EXIT_FAILURE_OTHER);
+ }
+}
+
+#define PR_VALUE(descr, format, ...) \
+ XBT_INFO("| %.*s: " format, DATA_DESCR_WIDTH, \
+ descr ".................................................", \
+ __VA_ARGS__)
+
+#define PR_STATS(descr, st) \
+ XBT_INFO("| %.*s: %g / %g / %g", DATA_DESCR_WIDTH, \
+ descr " (total/avg./stddev).............................", \
+ st.get_sum(), st.get_mean(), st.get_stddev())
+
int main(int argc, char* argv[])
{
// Note: variables used after THROW must be declared as volatile.
volatile int exit_status = 0; // global exit status
volatile double simulated_time = -1.0;
- timestamp simulation_time;
+ timestamp elapsed_time(timestamp::wallclock_time);
+ timestamp simulation_time(timestamp::cpu_time);
xbt_ex_t ex;
MSG_error_t res;
+ elapsed_time.start();
simulation_time.start();
// Set default logging parameters
// Note: MSG_global_init() may throw an exception, but it seems
// impossible to catch it correctly :-(
MSG_global_init(&argc, argv);
+ install_signal_handler();
// Parse global parameters
- int parse_res = opt::parse_args(&argc, argv);
+ bool parse_res = opt::parse_args(&argc, argv);
if (!parse_res
|| opt::version_requested || opt::help_requested) {
if (opt::version_requested)
MSG_clean();
exit(parse_res ? EXIT_NO_FAILURE : EXIT_FAILURE_ARGS);
}
- INFO3("%s v%s (%s)", opt::program_name.c_str(), version::num.c_str(),
+ XBT_INFO("%s v%s (%s)", opt::program_name.c_str(), version::num.c_str(),
version::date.c_str());
opt::print();
MSG_function_register_default(simulation_main);
// Create the platform and the application.
+ XBT_DEBUG("Loading platform file...");
MSG_create_environment(opt::platform_file.c_str());
+ XBT_DEBUG("Creating hostdata...");
hostdata::create();
+ XBT_INFO("Loaded description of %zd hosts.", hostdata::size());
+ XBT_DEBUG("Deploying processes...");
if (opt::auto_depl::enabled) {
if (!opt::auto_depl::nhosts)
opt::auto_depl::nhosts = hostdata::size();
if (opt::auto_depl::nhosts > hostdata::size()) {
- WARN2("%u hosts is too much: limiting to %u",
- opt::auto_depl::nhosts, (unsigned )hostdata::size());
+ XBT_WARN("%u hosts is too much: limiting to %zu",
+ opt::auto_depl::nhosts, hostdata::size());
opt::auto_depl::nhosts = hostdata::size();
}
- if (!opt::auto_depl::load)
+ if (opt::auto_depl::load == 0.0) {
+ XBT_WARN("Initial load is zero! "
+ "Falling back on old behaviour (load = nhosts).");
opt::auto_depl::load = opt::auto_depl::nhosts;
+ } else if (opt::auto_depl::load < 0.0)
+ opt::auto_depl::load =
+ -opt::auto_depl::load * opt::auto_depl::nhosts;
+ double iload = std::trunc(opt::auto_depl::load);
+ if (opt::integer_transfer && opt::auto_depl::load != iload) {
+ XBT_WARN("Total load %g is not an integer. Truncate it.",
+ opt::auto_depl::load);
+ opt::auto_depl::load = iload;
+ }
MY_launch_application(); // it is already opt::* aware...
} else {
MSG_launch_application(opt::deployment_file.c_str());
}
+ // Register tracing categories
+ TRACE_category_with_color(TRACE_CAT_COMP, TRACE_COLOR_COMP);
+ TRACE_category_with_color(TRACE_CAT_CTRL, TRACE_COLOR_CTRL);
+ TRACE_category_with_color(TRACE_CAT_DATA, TRACE_COLOR_DATA);
+
exit_status = EXIT_FAILURE_SIMU; // =====
+ proc_mutex = new mutex_t();
+ proc_cond = new condition_t();
+
// Launch the MSG simulation.
- INFO1("Starting simulation at %f...", MSG_get_clock());
+ XBT_INFO("Starting simulation at %f...", MSG_get_clock());
res = MSG_main();
simulated_time = MSG_get_clock();
- INFO1("Simulation ended at %f.", simulated_time);
- check_for_lost_load();
- compute_load_imbalance();
+ XBT_INFO("Simulation ended at %f.", simulated_time);
+
+ delete proc_cond;
+ delete proc_mutex;
+
if (res != MSG_OK)
- THROW1(0, 0, "MSG_main() failed with status %#x", res);
+ THROWF(0, 0, "MSG_main() failed with status %#x", res);
exit_status = EXIT_NO_FAILURE; // =====
}
int len = strlen(ex.msg);
if (len > 0 && ex.msg[len - 1] == '\n')
ex.msg[len - 1] = '\0'; // strip the ending '\n'
- ERROR1("%s", ex.msg);
- DEBUG3("Error from %s() in %s:%d", ex.func, ex.file, ex.line);
+ XBT_ERROR("%s", ex.msg);
+ XBT_DEBUG("Error from %s() in %s:%d", ex.func, ex.file, ex.line);
xbt_ex_free(ex);
}
hostdata::destroy();
res = MSG_clean();
if (res != MSG_OK) {
- ERROR1("MSG_clean() failed with status %#x", res);
+ XBT_ERROR("MSG_clean() failed with status %#x", res);
exit_status |= EXIT_FAILURE_CLEAN;
}
// Report final simulation status.
if (simulated_time >= 0.0) {
simulation_time.stop();
- INFO0(",----[ Results ]");
- INFO2("| Load avg./stddev. at exit.: %g / %g", load_avg, load_stddev);
- INFO1("| Total simulated time......: %g", simulated_time);
- INFO1("| Total simulation time.....: %g", simulation_time.duration());
- INFO0("`----");
+ elapsed_time.stop();
+ if (!check_for_lost_load())
+ exit_status |= EXIT_FAILURE_LOAD;
+
+ XBT_INFO(",----[ Results ]");
+ PR_STATS("Load", loads);
+ PR_STATS("Computation", comps);
+ PR_STATS("Comp. iterations", comp_iterations);
+ PR_STATS("X-Comp. iterations", all_comp_iterations);
+ PR_STATS("Idle duration", idle_duration);
+ PR_STATS("Data send amount", data_send_amount);
+ PR_STATS("Data recv amount", data_recv_amount);
+ PR_STATS("Data send count", data_send_count);
+ PR_STATS("Data recv count", data_recv_count);
+ PR_STATS("Ctrl send amount", ctrl_send_amount);
+ PR_STATS("Ctrl recv amount", ctrl_recv_amount);
+ PR_STATS("Ctrl send count", ctrl_send_count);
+ PR_STATS("Ctrl recv count", ctrl_recv_count);
+ PR_VALUE("Total simulated time", "%g", simulated_time);
+ PR_VALUE("Total simulation time", "%g", simulation_time.duration());
+ PR_VALUE("Elapsed (wall clock) time", "%g", elapsed_time.duration());
+ XBT_INFO("`----");
+
+ double load_imbalance = 100.0 * loads.get_stddev() / loads.get_mean();
+ double transfer_amount =
+ data_send_amount.get_sum() / opt::comm_cost(loads.get_sum());
+
+ XBT_INFO(",----[ Useful metrics ]");
+ PR_VALUE("Final load imbalance", "%g %s", load_imbalance,
+ "percent of the load average");
+ PR_VALUE("Data transfer amount", "%g %s", transfer_amount,
+ "times the total amount of data");
+ PR_VALUE("Number of hosts that converged", "%u / %u",
+ convergence.get_count(), loads.get_count());
+ PR_VALUE("Times of convergence (min/max/avg/dev)", "%g / %g / %g / %g",
+ convergence.get_min(), convergence.get_max(),
+ convergence.get_mean(), convergence.get_stddev());
+ XBT_INFO("`----");
+
}
if (exit_status)
- ERROR1("Simulation failed (%#x).", exit_status);
+ XBT_ERROR("Simulation failed (%#x).", exit_status);
else
- INFO0("Simulation succeeded.");
+ XBT_INFO("Simulation succeeded.");
return exit_status;
}
