X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/dbc9221771e3158336126009aff945e86acca5da..d8bc41619b280838934e13bef30f911715259fc9:/process.cpp diff --git a/process.cpp b/process.cpp index 306687f..34ddbea 100644 --- a/process.cpp +++ b/process.cpp @@ -1,7 +1,6 @@ #include #include #include -#include #include #include #include @@ -11,6 +10,7 @@ XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); #include "misc.h" #include "options.h" +#include "tracing.h" #include "process.h" @@ -20,7 +20,7 @@ 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); @@ -33,22 +33,18 @@ process::process(int argc, char* argv[]) 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; + 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(); - } close_received = false; - may_receive = (neigh.size() > 0); // the same as (ctrl_close_pending || - // data_close_pending) finalizing = false; - if (may_receive) - comm.listen(); + + comp_iter = lb_iter = 0; e_xbt_log_priority_t logp = xbt_log_priority_verbose; if (!LOG_ISENABLED(logp)) @@ -62,75 +58,109 @@ process::process(int argc, char* argv[]) std::tr1::mem_fn(&neighbor::get_name)); oss << neigh.back().get_name(); } - LOG1(logp, "Got %s.", oss.str().c_str()); + XBT_LOG(logp, "Got %s.", oss.str().c_str()); print_loads(false, logp); } process::~process() { - total_load_exit += load; + total_load_exit += real_load; + if (opt::bookkeeping) { + XBT_INFO("Final load after %d:%d iterations: %g ; expected: %g", + lb_iter, comp_iter, real_load, expected_load); + } else { + XBT_INFO("Final load after %d iterations: %g", + lb_iter, real_load); + if (lb_iter != comp_iter) + XBT_WARN("lb_iter (%d) and comp_iter (%d) differ!", + lb_iter, comp_iter); + } + XBT_VERB("Total computation for this process: %g", comp); } int process::run() { - INFO1("Initial load: %g", load); - VERB0("Starting..."); - iter = 0; + double next_iter_after_date = 0.0; + XBT_INFO("Initial load: %g", real_load); + XBT_VERB("Starting..."); while (true) { - if (load > 0.0) { - ++iter; - if (opt::log_rate && iter % opt::log_rate == 0) { + 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_lb_iter_duration; + + ++lb_iter; + + if (opt::log_rate && lb_iter % opt::log_rate == 0) { if (opt::bookkeeping) - INFO3("(%u) current load: %g ; expected: %g", - iter, load, expected_load); + XBT_INFO("(%u:%u) current load: %g ; expected: %g", + lb_iter, comp_iter, real_load, expected_load); else - INFO2("(%u) current load: %g", - iter, load); + XBT_INFO("(%u) current load: %g", + lb_iter, real_load); } - if (opt::bookkeeping) - expected_load -= load_balance(expected_load); - else - load -= load_balance(load); + load_balance(); print_loads(true, xbt_log_priority_debug); + } - send(); + // send load information, and load (data) if any + send_all(); + if (real_load > 0.0) { + ++comp_iter; compute(); + } - if (opt::maxiter && iter >= opt::maxiter) - break; - } else { - // send load information, and load when bookkeeping - send(); + if (opt::lb_maxiter && lb_iter >= opt::lb_maxiter) { + XBT_VERB("Reached lb_maxiter: %d/%d", lb_iter, opt::lb_maxiter); + break; + } + if (opt::comp_maxiter && comp_iter >= opt::comp_maxiter) { + XBT_VERB("Reached comp_maxiter: %d/%d", comp_iter, opt::comp_maxiter); + break; + } + if (opt::time_limit && MSG_get_clock() >= opt::time_limit) { + XBT_VERB("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 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); + double timeout; + if (real_load != 0 || get_load() != prev_load_broadcast) + timeout = 0.0; + else if (opt::min_lb_iter_duration) + timeout = opt::min_lb_iter_duration; + else + timeout = 1.0; + receive(timeout); // one of our neighbor is finalizing - if (opt::exit_on_close && close_received) + if (opt::exit_on_close && close_received) { + XBT_VERB("Close received"); break; + } // have no load and cannot receive anything - if (load == 0.0 && !may_receive) + if (real_load == 0.0 && !may_receive()) { + XBT_VERB("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, stopping."); + XBT_VERB("No more load to balance in system."); break; + } else { + XBT_DEBUG("still %g load to balance, continuing...", total_load_running); } - } - VERB0("Going to finalize..."); + XBT_VERB("Going to finalize..."); finalize(); /* Open Questions : @@ -139,48 +169,42 @@ int process::run() * - how to manage link failures ? */ - VERB0("Done."); - INFO3("Final load after %d iteration%s: %g", iter, ESSE(iter), load); - if (opt::bookkeeping) - INFO1("Expected load: %g", expected_load); + XBT_VERB("Done."); return 0; } -double process::sum_of_to_send() const +void process::load_balance() { - 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 (iter == 1) - WARN0("process::load_balance is a no-op!"); - return 0.0; + if (lb_iter == 1) // warn only once + XBT_WARN("process::load_balance() is a no-op!"); } 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)); + 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); + XBT_DEBUG("compute %g flop%s", flops, ESSE(flops)); MSG_task_execute(task); + comp += flops; MSG_task_destroy(task); } else { - DEBUG0("nothing to compute !"); + XBT_DEBUG("nothing to compute !"); } } +void process::send(neighbor& nb, double amount) +{ + 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)); @@ -204,20 +228,20 @@ 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 std::tr1::bind; using std::tr1::placeholders::_1; @@ -229,18 +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); } -void process::receive(recv_wait_mode wait) +void process::receive(double timeout) { - // 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)) { + + XBT_DEBUG("%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]; @@ -252,28 +276,24 @@ void process::receive(recv_wait_mode wait) break; case message::LOAD: { double ld = msg->get_amount(); - load += ld; + 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); + 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); + data_close_pending--; close_received = true; break; } delete msg; - may_receive = (ctrl_close_pending || data_close_pending); - do_wait = (wait == WAIT_FOR_CLOSE); + timeout = 0.0; // only wait on first recv } + comm.flush(false); } void process::finalize1(neighbor& nb) @@ -288,16 +308,18 @@ void process::finalize() using std::tr1::placeholders::_1; finalizing = true; - total_load_running -= load; + total_load_running -= real_load; - DEBUG2("send CLOSE to %d neighbor%s.", - (int )neigh.size(), ESSE(neigh.size())); + XBT_DEBUG("send CLOSE to %zu neighbor%s", 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); + XBT_DEBUG("waiting for %d CTRL and %d DATA CLOSE", + ctrl_close_pending, data_close_pending); + receive(-1.0); + } comm.flush(true); } @@ -306,7 +328,7 @@ void process::finalize() if (_XBT_LOG_ISENABLEDV((*cat), logp)) { \ using std::tr1::bind; \ using std::tr1::placeholders::_1; \ - XCLOG0(cat, logp, "Neighbor loads:"); \ + XBT_XCLOG(cat, logp, "Neighbor loads:"); \ std::for_each(vec.begin(), vec.end(), \ bind(&neighbor::print, _1, verbose, logp, cat)); \ } else ((void)0)