X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/f29b38ef2a056daa14bbfda2fce78063faa773d4..50a00235743c59840ee2db2258e9e6dd7444f646:/process.cpp diff --git a/process.cpp b/process.cpp index 8ceb469..8b31678 100644 --- a/process.cpp +++ b/process.cpp @@ -1,69 +1,137 @@ #include -#include +#include #include +#include #include #include #include +#include + +XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); + #include "misc.h" -#include "process.h" +#include "options.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(); + if (neigh.size() == 1) { + comm.next_close_on_ctrl_is_last(); + comm.next_close_on_data_is_last(); + } + close_received = false; + may_receive = (neigh.size() > 0); // the same as (ctrl_close_pending || + // data_close_pending) + finalizing = false; + if (may_receive) + comm.listen(); + 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); } -void process::print_loads(e_xbt_log_priority_t logp) +process::~process() { - if (!LOG_ISENABLED(logp)) - return; - std::ostringstream oss; - if (neigh.empty()) { - oss << "no neighbor!"; - } else { - std::transform(neigh.begin(), neigh.end() - 1, - std::ostream_iterator(oss, ", "), - std::mem_fun_ref(&neighbor::getLoad)); - oss << neigh.back().getLoad(); - } - LOG1(logp, "Neighbor loads: %s", oss.str().c_str()); + 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; - * } - */ + INFO1("Initial load: %g", load); + VERB0("Starting..."); + iter = 0; + while (true) { + if (load > 0.0) { + ++iter; + if (opt::log_rate && iter % opt::log_rate == 0) { + if (opt::bookkeeping) + INFO3("(%u) current load: %g ; expected: %g", + iter, load, expected_load); + else + INFO2("(%u) current load: %g", + 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(); + + if (opt::maxiter && iter >= opt::maxiter) + break; + } else { + // send load information, and load when bookkeeping + send(); + } + + // block on receiving unless there is something to compute or + // to send + bool recv_wait = (load == 0 && + ((opt::bookkeeping ? expected_load : load) + == prev_load_broadcast)); + DEBUG1("CALL RECEIVE(%s)", recv_wait? "WAIT": "NO_WAIT"); + receive(recv_wait? WAIT: NO_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! + 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 ? @@ -71,11 +139,193 @@ int process::run() * - how to manage link failures ? */ - // xxx: shall we retrieve pending tasks? - + VERB0("Done."); + INFO3("Final load after %d iteration%s: %g", iter, ESSE(iter), load); + if (opt::bookkeeping) + INFO1("Expected load: %g", expected_load); return 0; } +double process::sum_of_to_send() const +{ + using namespace std::tr1; + using namespace std::tr1::placeholders; + + 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 (iter == 1) + WARN0("process::load_balance is a no-op!"); + return 0.0; +} + +void process::compute() +{ + 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::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 namespace std::tr1; + using namespace std::tr1::placeholders; + + 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; + } +} + +void process::receive(recv_wait_mode wait) +{ + // DEBUG1("go for receive(%s)", + // "NO_WAIT\0WAIT\0\0\0\0WAIT_FOR_CLOSE" + 8 * wait); + message* msg; + m_host_t from; + bool do_wait = (wait != NO_WAIT); + while (may_receive && comm.recv(msg, from, do_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: + if (--ctrl_close_pending == 1) + comm.next_close_on_ctrl_is_last(); + // DEBUG1("ctrl_close_pending = %d", ctrl_close_pending); + close_received = true; + break; + case message::DATA_CLOSE: + if (--data_close_pending == 1) + comm.next_close_on_data_is_last(); + // DEBUG1("data_close_pending = %d", data_close_pending); + close_received = true; + break; + } + delete msg; + may_receive = (ctrl_close_pending || data_close_pending); + do_wait = (wait == WAIT_FOR_CLOSE); + } +} + +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 namespace std::tr1; + using namespace std::tr1::placeholders; + + finalizing = true; + total_load_running -= load; + + DEBUG2("send CLOSE to %d neighbor%s.", + (int )neigh.size(), ESSE(neigh.size())); + std::for_each(neigh.begin(), neigh.end(), + bind(&process::finalize1, this, _1)); + + DEBUG2("wait for CLOSE from %d neighbor%s.", + (int )neigh.size(), ESSE(neigh.size())); + receive(WAIT_FOR_CLOSE); + + comm.flush(true); +} + +#define print_loads_generic(vec, verbose, logp, cat) \ + if (_XBT_LOG_ISENABLEDV((*cat), logp)) { \ + using namespace std::tr1; \ + using namespace std::tr1::placeholders; \ + 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: