X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/ba8a9c5fbc92dc95fc99d8078b3474fd2fd5a043..cd6b2539af2f8564684f287983ffb05bb0f7b285:/process.cpp?ds=sidebyside diff --git a/process.cpp b/process.cpp index ed7be05..57c0661 100644 --- a/process.cpp +++ b/process.cpp @@ -1,21 +1,26 @@ -#include "process.h" - #include #include #include -#include #include #include #include #include + +XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); + #include "misc.h" #include "options.h" +#include "tracing.h" -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); +#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)) + if (argc < 2 || !(std::istringstream(argv[1]) >> real_load)) throw std::invalid_argument("bad or missing initial load parameter"); neigh.assign(argv + 2, argv + argc); @@ -28,15 +33,18 @@ process::process(int argc, char* argv[]) rev_neigh.insert(std::make_pair(host, ptr)); } - expected_load = load; + comp = 0.0; + + prev_load_broadcast = -1; // force sending of load on first send_all() + expected_load = real_load; + total_load_running += real_load; + total_load_init += real_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; + + comp_iter = lb_iter = 0; e_xbt_log_priority_t logp = xbt_log_priority_verbose; if (!LOG_ISENABLED(logp)) @@ -51,53 +59,106 @@ 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 += real_load; + if (opt::bookkeeping) { + INFO4("Final load after %d:%d iterations: %g ; expected: %g", + lb_iter, comp_iter, real_load, expected_load); + } else { + INFO2("Final load after %d iterations: %g", + lb_iter, real_load); + if (lb_iter != comp_iter) + WARN2("lb_iter (%d) and comp_iter (%d) differ!", + lb_iter, comp_iter); + } + VERB1("Total computation for this process: %g", comp); } int process::run() { - bool one_more = true; - - INFO1("Initial load: %g", load); + double next_iter_after_date = 0.0; + INFO1("Initial load: %g", real_load); VERB0("Starting..."); - // first send() to inform neighbors about our load (force it) - prev_load_broadcast = !(opt::bookkeeping? expected_load: load); - send(); - iter = 0; - while (one_more) { - 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); + while (true) { + if (get_load() > 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; + + ++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, real_load, expected_load); + else + INFO2("(%u) current load: %g", + lb_iter, real_load); + } + + load_balance(); + + print_loads(true, xbt_log_priority_debug); } - print_loads(xbt_log_priority_debug); - bool do_compute = load > 0.0; - if (do_compute) { + // send load information, and load (data) if any + send_all(); + if (real_load > 0.0) { + ++comp_iter; compute(); - ++iter; } - bool close_received = !receive(do_compute? NO_WAIT: WAIT); + 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; + } - if (opt::bookkeeping) - expected_load -= load_balance(expected_load); + // block on receiving unless there is something to compute or + // to send + double timeout; + if (real_load != 0 || get_load() != prev_load_broadcast) + timeout = 0.0; + else if (opt::min_iter_duration) + timeout = opt::min_iter_duration; else - load -= load_balance(load); + timeout = 1.0; + receive(timeout); + + // one of our neighbor is finalizing + if (opt::exit_on_close && close_received) { + VERB0("Close received"); + break; + } - send(); + // have no load and cannot receive anything + if (real_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; + } else { + DEBUG1("still %g load to balance, continuing...", total_load_running); + } } VERB0("Going to finalize..."); finalize(); @@ -109,44 +170,41 @@ 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); return 0; } -double process::sum_of_to_send() const +void process::load_balance() { - 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))); + if (lb_iter == 1) // warn only once + WARN0("process::load_balance() is a no-op!"); } -double process::load_balance(double /*my_load*/) +void process::compute() { - if (iter == 1) - WARN0("process::load_balance is a no-op!"); - return 0.0; + if (real_load > 0.0) { + double flops = opt::comp_cost(real_load); + m_task_t task = MSG_task_create("computation", flops, 0.0, NULL); + TRACE_msg_set_task_category(task, TRACE_CAT_COMP); + 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::compute() +void process::send(neighbor& nb, double amount) { - 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); + set_load(get_load() - amount); + nb.set_to_send(nb.get_to_send() + amount); + nb.set_load(nb.get_load() + amount); // fixme: make this optional? } void process::send1_no_bookkeeping(neighbor& nb) { - if (load != prev_load_broadcast) - comm.send(nb.get_ctrl_mbox(), new message(message::INFO, load)); + if (real_load != prev_load_broadcast) + comm.send(nb.get_ctrl_mbox(), new message(message::INFO, real_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)); @@ -170,25 +228,24 @@ void process::send1_bookkeeping(neighbor& nb) } else { new_debt = nb.get_debt(); } - if (load <= new_debt) { - load_to_send = load; + if (real_load <= new_debt) { + load_to_send = real_load; nb.set_debt(new_debt - load_to_send); - load = 0.0; + real_load = 0.0; } else { load_to_send = new_debt; nb.set_debt(0.0); - load -= load_to_send; + real_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() +void process::send_all() { - using namespace std::tr1; - using namespace std::tr1::placeholders; + using std::tr1::bind; + using std::tr1::placeholders::_1; - // fixme: shall we send data at all iterations? if (opt::bookkeeping) { std::for_each(neigh.begin(), neigh.end(), bind(&process::send1_bookkeeping, this, _1)); @@ -196,18 +253,18 @@ void process::send() } else { std::for_each(neigh.begin(), neigh.end(), bind(&process::send1_no_bookkeeping, this, _1)); - prev_load_broadcast = load; + prev_load_broadcast = real_load; } + comm.flush(false); } -// Returns false if a CLOSE message was received. -bool process::receive(recv_wait_mode wait) +void process::receive(double timeout) { - bool result = true; message* msg; m_host_t from; - bool do_recv = ctrl_close_pending || data_close_pending; - while (do_recv && comm.recv(msg, from, wait)) { + + DEBUG2("%sblocking receive (%g)", "\0non-" + !timeout, timeout); + while (may_receive() && comm.recv(msg, from, timeout)) { switch (msg->get_type()) { case message::INFO: { neighbor* n = rev_neigh[from]; @@ -217,69 +274,82 @@ bool process::receive(recv_wait_mode wait) case message::CREDIT: expected_load += msg->get_amount(); break; - case message::LOAD: - load += msg->get_amount(); + case message::LOAD: { + double ld = msg->get_amount(); + real_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; - do_recv = (wait == WAIT_FOR_CLOSE) && - (ctrl_close_pending || data_close_pending); + 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)); + 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; + using std::tr1::bind; + using std::tr1::placeholders::_1; - DEBUG2("send CLOSE to %d neighbor%s.", - (int )neigh.size(), ESSE(neigh.size())); + finalizing = true; + total_load_running -= real_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 %d neighbor%s.", - (int )neigh.size(), ESSE(neigh.size())); - receive(WAIT_FOR_CLOSE); + while (may_receive()) { + comm.flush(false); + DEBUG2("waiting for %d CTRL and %d DATA CLOSE", + ctrl_close_pending, data_close_pending); + receive(-1.0); + } 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: