X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/fc5dcac1115a7112e7ad9d67ce7fe233790e0887..06b0d2707f37e788c6d54a8fb49ceb4f9ec8ceba:/process.cpp diff --git a/process.cpp b/process.cpp index e9e2348..80fd618 100644 --- a/process.cpp +++ b/process.cpp @@ -1,29 +1,52 @@ #include #include #include +#include #include #include #include #include + +XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); + #include "misc.h" #include "options.h" + #include "process.h" -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simu); +double process::total_load_init = 0.0; +double process::total_load_running = 0.0; +double process::total_load_exit = 0.0; process::process(int argc, char* argv[]) { if (argc < 2 || !(std::istringstream(argv[1]) >> load)) - throw std::invalid_argument("bad or missing initial load"); + throw std::invalid_argument("bad or missing initial load parameter"); neigh.assign(argv + 2, argv + argc); + + pneigh.reserve(neigh.size()); + for (unsigned i = 0 ; i < neigh.size() ; i++) { + neighbor* ptr = &neigh[i]; + m_host_t host = MSG_get_host_by_name(ptr->get_name()); + pneigh.push_back(ptr); + rev_neigh.insert(std::make_pair(host, ptr)); + } + + comp = 0.0; + + prev_load_broadcast = -1; // force sending of load on first send() expected_load = load; + total_load_running += load; + total_load_init += load; + ctrl_close_pending = data_close_pending = neigh.size(); + close_received = false; + finalizing = false; e_xbt_log_priority_t logp = xbt_log_priority_verbose; if (!LOG_ISENABLED(logp)) return; - LOG1(logp, "My initial load is: %g", load); std::ostringstream oss; oss << neigh.size() << " neighbor"; if (!neigh.empty()) { @@ -34,134 +57,303 @@ process::process(int argc, char* argv[]) oss << neigh.back().get_name(); } LOG1(logp, "Got %s.", oss.str().c_str()); - print_loads(logp); + print_loads(false, logp); +} + +process::~process() +{ + total_load_exit += load; } int process::run() { - INFO0("Coucou !"); + double next_iter_after_date = 0.0; + INFO1("Initial load: %g", load); + VERB0("Starting..."); + comp_iter = lb_iter = 0; + while (true) { + double ld = lb_load(); + if (ld > 0.0) { + double now = MSG_get_clock(); + if (now < next_iter_after_date) + MSG_process_sleep(next_iter_after_date - now); + next_iter_after_date = MSG_get_clock() + opt::min_iter_duration; - int n = 100; - while (n--) { - if (opt::bookkeeping) - INFO2("current load: %g ; expected: %g", load, expected_load); - else - INFO1("current load: %g", load); + ++lb_iter; + + if (opt::log_rate && lb_iter % opt::log_rate == 0) { + if (opt::bookkeeping) + INFO4("(%u:%u) current load: %g ; expected: %g", + lb_iter, comp_iter, load, expected_load); + else + INFO2("(%u) current load: %g", + lb_iter, load); + } + + ld -= load_balance(ld); + + print_loads(true, xbt_log_priority_debug); + } + lb_load() = ld; - if (load > 0) + // send load information, and load (data) if any + send(); + if (load > 0.0) { + ++comp_iter; compute(); + } + + if (opt::lb_maxiter && lb_iter >= opt::lb_maxiter) { + VERB2("Reached lb_maxiter: %d/%d", lb_iter, opt::lb_maxiter); + break; + } + if (opt::comp_maxiter && comp_iter >= opt::comp_maxiter) { + VERB2("Reached comp_maxiter: %d/%d", comp_iter, opt::comp_maxiter); + break; + } + if (opt::time_limit && MSG_get_clock() >= opt::time_limit) { + VERB2("Reached time limit: %g/%g", MSG_get_clock(), opt::time_limit); + break; + } + + // block on receiving unless there is something to compute or + // to send + double timeout; + if (load != 0 || lb_load() != prev_load_broadcast) + timeout = 0.0; + else if (opt::min_iter_duration) + timeout = opt::min_iter_duration; else - xbt_sleep(100); // fixme - if (!receive(false)) - n = 0; + timeout = 1.0; + receive(timeout); + + // one of our neighbor is finalizing + if (opt::exit_on_close && close_received) { + VERB0("Close received"); + break; + } + + // have no load and cannot receive anything + if (load == 0.0 && !may_receive()) { + VERB0("I'm a poor lonesome process, and I have no load..."); + break; + } + + // fixme: this check should be implemented with a distributed + // algorithm, and not a shared global variable! + // fixme: should this chunk be moved before call to receive() ? + if (100.0 * total_load_running / total_load_init <= + opt::load_ratio_threshold) { + VERB0("No more load to balance in system."); + break; + } else { + DEBUG1("still %g load to balance, continuing...", total_load_running); + } } - DEBUG0("going to finalize."); + VERB0("Going to finalize..."); finalize(); - // MSG_process_sleep(100.0); // xxx - /* xxx: - * while (there is something to do) { - * compute some task; - * get received tasks; - * compute load balancing; - * send tasks to neighbors; - * } - * finalize; - * wait for pending messages; - */ - /* Open Questions : * - definition of load on heterogeneous hosts ? * - how to detect convergence ? * - how to manage link failures ? */ - DEBUG0("done."); + VERB0("Done."); + if (opt::bookkeeping) { + INFO4("Final load after %d:%d iterations: %g ; expected: %g", + lb_iter, comp_iter, load, expected_load); + } else { + INFO2("Final load after %d iterations: %g", + lb_iter, load); + if (lb_iter != comp_iter) + WARN2("lb_iter (%d) and comp_iter (%d) differ!", + lb_iter, comp_iter); + } return 0; } +double process::sum_of_to_send() const +{ + using std::tr1::bind; + using std::tr1::placeholders::_1; + using std::tr1::placeholders::_2; + + return std::accumulate(neigh.begin(), neigh.end(), 0.0, + bind(std::plus(), + _1, bind(&neighbor::get_to_send, _2))); +} + +double process::load_balance(double /*my_load*/) +{ + if (lb_iter == 1) // warn only once + WARN0("process::load_balance() is a no-op!"); + return 0.0; +} + void process::compute() { - double duration = opt::comp_cost(load); - m_task_t task = MSG_task_create("computation", duration, 0.0, NULL); - DEBUG2("compute %g flop%s.", duration, ESSE(duration)); - MSG_task_execute(task); - MSG_task_destroy(task); + if (load > 0.0) { + double flops = opt::comp_cost(load); + m_task_t task = MSG_task_create("computation", flops, 0.0, NULL); + DEBUG2("compute %g flop%s", flops, ESSE(flops)); + MSG_task_execute(task); + comp += flops; + MSG_task_destroy(task); + } else { + DEBUG0("nothing to compute !"); + } +} + +void process::send1_no_bookkeeping(neighbor& nb) +{ + if (load != prev_load_broadcast) + comm.send(nb.get_ctrl_mbox(), new message(message::INFO, load)); + double load_to_send = nb.get_to_send(); + if (load_to_send > 0.0) { + comm.send(nb.get_data_mbox(), new message(message::LOAD, load_to_send)); + nb.set_to_send(0.0); + } +} + +void process::send1_bookkeeping(neighbor& nb) +{ + if (expected_load != prev_load_broadcast) + comm.send(nb.get_ctrl_mbox(), + new message(message::INFO, expected_load)); + double load_to_send; + double new_debt; + double debt_to_send = nb.get_to_send(); + if (debt_to_send > 0.0) { + comm.send(nb.get_ctrl_mbox(), + new message(message::CREDIT, debt_to_send)); + nb.set_to_send(0.0); + new_debt = nb.get_debt() + debt_to_send; + } else { + new_debt = nb.get_debt(); + } + if (load <= new_debt) { + load_to_send = load; + nb.set_debt(new_debt - load_to_send); + load = 0.0; + } else { + load_to_send = new_debt; + nb.set_debt(0.0); + load -= load_to_send; + } + if (load_to_send > 0.0) + comm.send(nb.get_data_mbox(), new message(message::LOAD, load_to_send)); +} + +void process::send() +{ + using std::tr1::bind; + using std::tr1::placeholders::_1; + + if (opt::bookkeeping) { + std::for_each(neigh.begin(), neigh.end(), + bind(&process::send1_bookkeeping, this, _1)); + prev_load_broadcast = expected_load; + } else { + std::for_each(neigh.begin(), neigh.end(), + bind(&process::send1_no_bookkeeping, this, _1)); + prev_load_broadcast = load; + } + comm.flush(false); } -bool process::receive(bool wait_for_close) +void process::receive(double timeout) { - bool result = true; message* msg; m_host_t from; - while ((ctrl_close_pending || - data_close_pending) && comm.recv(msg, from, wait_for_close)) { + + DEBUG2("%sblocking receive (%g)", "\0non-" + !timeout, timeout); + while (may_receive() && comm.recv(msg, from, timeout)) { switch (msg->get_type()) { - case message::INFO: - DEBUG0("received INFO"); - // fixme: update neighbor - // need a map m_host_t -> neighbor& + case message::INFO: { + neighbor* n = rev_neigh[from]; + n->set_load(msg->get_amount()); break; + } case message::CREDIT: - DEBUG0("received CREDIT"); expected_load += msg->get_amount(); break; - case message::LOAD: - DEBUG0("received LOAD"); - load += msg->get_amount(); + case message::LOAD: { + double ld = msg->get_amount(); + load += ld; + if (finalizing) + total_load_running -= ld; break; + } case message::CTRL_CLOSE: - DEBUG0("received CTRL_CLOSE"); - if (--ctrl_close_pending == 1) - comm.next_close_on_ctrl_is_last(); - result = false; + ctrl_close_pending--; + close_received = true; break; case message::DATA_CLOSE: - DEBUG0("received DATA_CLOSE"); - if (--data_close_pending == 1) - comm.next_close_on_data_is_last(); - result = false; + data_close_pending--; + close_received = true; break; } delete msg; + timeout = 0.0; // only wait on first recv } - return result; + comm.flush(false); +} + +void process::finalize1(neighbor& nb) +{ + comm.send(nb.get_ctrl_mbox(), new message(message::CTRL_CLOSE, 0.0)); + comm.send(nb.get_data_mbox(), new message(message::DATA_CLOSE, 0.0)); } void process::finalize() { - DEBUG2("send CLOSE to %d neighbor%s.", - (int )neigh.size(), ESSE(neigh.size())); - std::vector::iterator n; - for (n = neigh.begin() ; n != neigh.end() ; ++n) { - comm.send(n->get_ctrl_mbox(), new message(message::CTRL_CLOSE, 0.0)); - comm.send(n->get_data_mbox(), new message(message::DATA_CLOSE, 0.0)); - } + using std::tr1::bind; + using std::tr1::placeholders::_1; + + finalizing = true; + total_load_running -= load; - DEBUG2("wait for CLOSE from %d neighbor%s.", - (int )neigh.size(), ESSE(neigh.size())); - receive(true); + DEBUG2("send CLOSE to %lu neighbor%s", + (unsigned long )neigh.size(), ESSE(neigh.size())); + std::for_each(neigh.begin(), neigh.end(), + bind(&process::finalize1, this, _1)); + + DEBUG2("wait for CLOSE from %lu neighbor%s", + (unsigned long )neigh.size(), ESSE(neigh.size())); + while (may_receive()) { + comm.flush(false); + receive(-1.0); + } - comm.wait_for_sent(); + comm.flush(true); } -void process::print_loads(e_xbt_log_priority_t logp) +#define print_loads_generic(vec, verbose, logp, cat) \ + if (_XBT_LOG_ISENABLEDV((*cat), logp)) { \ + using std::tr1::bind; \ + using std::tr1::placeholders::_1; \ + XCLOG0(cat, logp, "Neighbor loads:"); \ + std::for_each(vec.begin(), vec.end(), \ + bind(&neighbor::print, _1, verbose, logp, cat)); \ + } else ((void)0) + +void process::print_loads(bool verbose, + e_xbt_log_priority_t logp, + xbt_log_category_t cat) const { - if (!LOG_ISENABLED(logp)) - return; + print_loads_generic(neigh, verbose, logp, cat); +} - std::ostringstream oss; - if (neigh.empty()) { - oss << "no neighbor!"; - } else { - std::transform(neigh.begin(), neigh.end() - 1, - std::ostream_iterator(oss, ", "), - std::tr1::mem_fn(&neighbor::get_load)); - oss << neigh.back().get_load(); - } - LOG1(logp, "Neighbor loads: %s", oss.str().c_str()); +void process::print_loads_p(bool verbose, + e_xbt_log_priority_t logp, + xbt_log_category_t cat) const +{ + print_loads_generic(pneigh, verbose, logp, cat); } +#undef print_loads_generic + // Local variables: // mode: c++ // End: