X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/d47d44b2ed067c834ef210ad544512e7581a1c8e..99ec08fb32d4b65c88628e45f9ebdb26741b9674:/process.cpp?ds=inline diff --git a/process.cpp b/process.cpp index 7605818..34590f3 100644 --- a/process.cpp +++ b/process.cpp @@ -1,54 +1,143 @@ #include -#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); +#include "process.h" -struct message { - double measure; - double transfer; -}; +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[]) +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)); + } + + 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()) { - oss << (neigh.size() > 1 ? "s: " : ": "); + oss << ESSE(neigh.size()) << ": "; std::transform(neigh.begin(), neigh.end() - 1, - std::ostream_iterator(oss, ", "), - std::mem_fun_ref(&neighbor::getName)); - oss << neigh.back().getName(); + std::ostream_iterator(oss, ", "), + std::tr1::mem_fn(&neighbor::get_name)); + 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 !"); - 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; - * } - */ + double next_iter_after_date = 0.0; + INFO1("Initial load: %g", load); + VERB0("Starting..."); + comp_iter = lb_iter = 0; + while (true) { + if (opt::min_iter_duration) { + double now = MSG_get_clock(); + if (now < next_iter_after_date){ + double delay = next_iter_after_date - now; + DEBUG1("sleeping for %g s", delay); + MSG_process_sleep(next_iter_after_date - now); + } + next_iter_after_date = MSG_get_clock() + opt::min_iter_duration; + } + + if (load > 0.0) { + ++comp_iter; + if (opt::log_rate && comp_iter % opt::log_rate == 0) { + if (opt::bookkeeping) + INFO4("(%u:%u) current load: %g ; expected: %g", + comp_iter, lb_iter, load, expected_load); + else + INFO2("(%u) current load: %g", + comp_iter, load); + } + + if (opt::bookkeeping) + expected_load -= load_balance(expected_load); + else + load -= load_balance(load); + + print_loads(true, xbt_log_priority_debug); + + send(); + compute(); + + } else { + // send load information, and load when bookkeeping + send(); + } + + if (opt::comp_maxiter && comp_iter >= opt::comp_maxiter) + break; + if (opt::lb_maxiter && lb_iter >= opt::lb_maxiter) + break; + + // block on receiving unless there is something to compute or + // to send + bool wait = (load == 0 && + ((opt::bookkeeping ? expected_load : load) + == prev_load_broadcast)); + receive(wait); + + // one of our neighbor is finalizing + if (opt::exit_on_close && close_received) + break; + + // have no load and cannot receive anything + if (load == 0.0 && !may_receive()) + 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, stopping."); + break; + } + + } + VERB0("Going to finalize..."); + finalize(); /* Open Questions : * - definition of load on heterogeneous hosts ? @@ -56,35 +145,193 @@ int process::run() * - how to manage link failures ? */ - // xxx: shall we retrieve pending tasks? - + VERB0("Done."); + INFO3("Final load after %d iteration%s: %g", + comp_iter, ESSE(comp_iter), load); + if (opt::bookkeeping) + INFO1("Expected load: %g", expected_load); 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); - MSG_task_execute(task); - MSG_task_destroy(task); + if (load > 0.0) { + 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); + } else { + DEBUG0("nothing to compute !"); + } } -void process::print_loads(e_xbt_log_priority_t logp) +void process::send1_no_bookkeeping(neighbor& nb) { - if (!LOG_ISENABLED(logp)) - return; - std::ostringstream oss; - if (neigh.empty()) { - oss << "no neighbor!"; + 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 { - std::transform(neigh.begin(), neigh.end() - 1, - std::ostream_iterator(oss, ", "), - std::mem_fun_ref(&neighbor::getLoad)); - oss << neigh.back().getLoad(); + 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); +} + +void process::receive(bool wait) +{ + message* msg; + m_host_t from; + + while (may_receive() && comm.recv(msg, from, wait)) { + switch (msg->get_type()) { + case message::INFO: { + neighbor* n = rev_neigh[from]; + n->set_load(msg->get_amount()); + break; + } + case message::CREDIT: + expected_load += msg->get_amount(); + break; + case message::LOAD: { + double ld = msg->get_amount(); + load += ld; + if (finalizing) + total_load_running -= ld; + break; + } + case message::CTRL_CLOSE: + ctrl_close_pending--; + close_received = true; + break; + case message::DATA_CLOSE: + data_close_pending--; + close_received = true; + break; + } + delete msg; + wait = false; // only wait on first recv } - LOG1(logp, "Neighbor loads: %s", oss.str().c_str()); + 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() +{ + using std::tr1::bind; + using std::tr1::placeholders::_1; + + finalizing = true; + total_load_running -= load; + + 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(true); + } + + comm.flush(true); +} + +#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 +{ + print_loads_generic(neigh, verbose, logp, cat); +} + +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: