X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/4f8948b8f67d26726a2e53c9afe1a110c037ce4b..f2c30ea366a1f0ef91e94000f89b16a763c0dccd:/process.cpp?ds=inline diff --git a/process.cpp b/process.cpp index e1232f2..d3d9226 100644 --- a/process.cpp +++ b/process.cpp @@ -1,37 +1,48 @@ -#include "process.h" - #include #include #include +#include #include #include #include #include + +XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); + #include "misc.h" #include "options.h" -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simu); +#include "process.h" + +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); - std::for_each(neigh.begin(), neigh.end(), - std::tr1::bind(&process::insert_neighbor_in_map, - this, std::tr1::placeholders::_1)); + 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(); - if (neigh.size() == 1) { - comm.next_close_on_ctrl_is_last(); - comm.next_close_on_data_is_last(); - } - if (neigh.size() > 0) - comm.listen(); + close_received = false; + finalizing = false; e_xbt_log_priority_t logp = xbt_log_priority_verbose; if (!LOG_ISENABLED(logp)) @@ -46,48 +57,95 @@ 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() { - bool one_more = true; - + double next_iter_after_date = 0.0; INFO1("Initial load: %g", load); VERB0("Starting..."); - iter = 0; - while (one_more) { - ++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); + 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; } - compute(); + double ld = lb_load(); + if (ld > 0.0) { + ++lb_iter; - bool close_received = !receive(false); + 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); + } - if (opt::bookkeeping) - expected_load -= load_balance(expected_load); - else - load -= load_balance(load); + ld -= load_balance(ld); + print_loads(true, xbt_log_priority_debug); + } + lb_load() = ld; + + // send load information, and load (data) if any send(); - comm.flush(false); + 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 + bool wait = (load == 0 && lb_load() == prev_load_broadcast); + receive(wait); + + // 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; + } - if (opt::exit_on_close && close_received) - one_more = false; - if (opt::maxiter && iter >= opt::maxiter) - one_more = false; + // 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; + } } VERB0("Going to finalize..."); finalize(); @@ -99,32 +157,55 @@ int process::run() */ VERB0("Done."); - if (opt::bookkeeping) - INFO4("Final load after %d iteration%s: %g ; expected: %g", - iter, ESSE(iter), load, expected_load); - else - INFO3("Final load after %d iteration%s: %g", iter, ESSE(iter), load); + 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; } -void process::compute() +double process::sum_of_to_send() const { - // fixme: shall we do something special when duration is 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); + 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() +{ + 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) { - comm.send(nb.get_ctrl_mbox(), new message(message::INFO, load)); + 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)); @@ -134,7 +215,9 @@ void process::send1_no_bookkeeping(neighbor& nb) void process::send1_bookkeeping(neighbor& nb) { - comm.send(nb.get_ctrl_mbox(), new message(message::INFO, expected_load)); + 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(); @@ -161,28 +244,27 @@ void process::send1_bookkeeping(neighbor& nb) void process::send() { - // fixme: shall we send data at all iterations? + using std::tr1::bind; + using std::tr1::placeholders::_1; + if (opt::bookkeeping) { std::for_each(neigh.begin(), neigh.end(), - std::tr1::bind(&process::send1_bookkeeping, - this, std::tr1::placeholders::_1)); + bind(&process::send1_bookkeeping, this, _1)); + prev_load_broadcast = expected_load; } else { std::for_each(neigh.begin(), neigh.end(), - std::tr1::bind(&process::send1_no_bookkeeping, - this, std::tr1::placeholders::_1)); + bind(&process::send1_no_bookkeeping, this, _1)); + prev_load_broadcast = load; } + comm.flush(false); } -// Returns false if a CLOSE message was received. -bool process::receive(bool wait_for_close) +void process::receive(bool wait) { - bool result = true; message* msg; m_host_t from; - while ((ctrl_close_pending || - data_close_pending) && comm.recv(msg, from, wait_for_close)) { - DEBUG2("received %s from %s", - msg->to_string().c_str(), MSG_host_get_name(from)); + + while (may_receive() && comm.recv(msg, from, wait)) { switch (msg->get_type()) { case message::INFO: { neighbor* n = rev_neigh[from]; @@ -192,72 +274,82 @@ bool process::receive(bool wait_for_close) case message::CREDIT: expected_load += msg->get_amount(); break; - case message::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: - if (--ctrl_close_pending == 1) - comm.next_close_on_ctrl_is_last(); - DEBUG1("ctrl_close_pending = %d", ctrl_close_pending); - result = false; + 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); - result = false; + data_close_pending--; + close_received = true; break; } delete msg; + wait = false; // 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)); + 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())); + 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(), - std::tr1::bind(&process::finalize1, - this, std::tr1::placeholders::_1)); + bind(&process::finalize1, this, _1)); - DEBUG2("wait for CLOSE from %d neighbor%s.", - (int )neigh.size(), ESSE(neigh.size())); - receive(true); + 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); } -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; - - 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()); + print_loads_generic(neigh, verbose, logp, cat); } -void process::insert_neighbor_in_map(neighbor& nb) +void process::print_loads_p(bool verbose, + e_xbt_log_priority_t logp, + xbt_log_category_t cat) const { - neighbor* nbp = &nb; - m_host_t host = MSG_get_host_by_name(nb.get_name()); - rev_neigh.insert(std::make_pair(host, nbp)); + print_loads_generic(pneigh, verbose, logp, cat); } +#undef print_loads_generic + // Local variables: // mode: c++ // End: