X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/48de9544b7eac2f9d40ea34a42c1d1a3d7ccbbfe..ed1b60f32b208ae07cc1f9d4d1aaa38f78359f53:/process.cpp?ds=inline diff --git a/process.cpp b/process.cpp index 2de3016..811804f 100644 --- a/process.cpp +++ b/process.cpp @@ -1,11 +1,10 @@ #include -#include +#include #include #include #include #include #include -#include XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); @@ -15,10 +14,19 @@ XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); #include "process.h" +mutex_t *process::proc_mutex; + double process::total_load_init = 0.0; double process::total_load_running = 0.0; double process::total_load_exit = 0.0; +int process::process_counter = 0; +double process::total_load_average; +double process::average_load_ratio; +double process::load_diff_threshold; + +std::atomic process::convergence_counter(0); + namespace { void sleep_until_date(double& date, double duration) @@ -36,30 +44,52 @@ process::process(int argc, char* argv[]) if (argc < 2 || !(std::istringstream(argv[1]) >> real_load)) throw std::invalid_argument("bad or missing initial load parameter"); + double iload = std::trunc(real_load); + if (opt::integer_transfer && real_load != iload) { + XBT_WARN("Initial load %g is not an integer. Truncate it.", + real_load); + real_load = iload; + } + 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()); + msg_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_all() expected_load = real_load; - total_load_running += real_load; - total_load_init += real_load; received_load = 0.0; + idle_duration = 0.0; + convergence = -1.0; + + proc_mutex->acquire(); + process_counter++; + convergence_counter++; + total_load_init += real_load; + total_load_running += real_load; + total_load_average = total_load_running / process_counter; + if (opt::avg_load_ratio >= 0.0) + average_load_ratio = opt::avg_load_ratio; + else + average_load_ratio = 100.0 * + (process_counter / -opt::avg_load_ratio) / total_load_average; + load_diff_threshold = (opt::load_ratio_threshold + + average_load_ratio * total_load_average) / 100.0; + proc_mutex->release(); + ctrl_close_pending = data_close_pending = neigh.size(); close_received = false; finalizing = false; - comp_iter = lb_iter = 0; + all_comp_iter = comp_iter = lb_iter = 0; - lb_thread = new_msg_thread("loba", - std::bind(&process::load_balance_loop, this)); + lb_thread = new_msg_thread("loba", [this]() { this->load_balance_loop(); }); e_xbt_log_priority_t logp = xbt_log_priority_verbose; if (!LOG_ISENABLED(logp)) @@ -70,7 +100,7 @@ process::process(int argc, char* argv[]) oss << ESSE(neigh.size()) << ": "; std::transform(neigh.begin(), neigh.end() - 1, std::ostream_iterator(oss, ", "), - std::mem_fn(&neighbor::get_name)); + [](const neighbor& neigh) { return neigh.get_name(); }); oss << neigh.back().get_name(); } XBT_LOG(logp, "Got %s.", oss.str().c_str()); @@ -80,15 +110,39 @@ process::process(int argc, char* argv[]) process::~process() { delete lb_thread; + proc_mutex->acquire(); total_load_exit += real_load; + proc_mutex->release(); xbt_assert(received_load == 0.0, "received_load is %g, but should be 0.0 !", received_load); if (opt::log_rate < 0) return; - XBT_INFO("Final load after %d:%d iterations: %g", - lb_iter, comp_iter, real_load); + XBT_INFO("Final load after %d:%d:%d iterations: %g", + lb_iter, comp_iter, all_comp_iter, real_load); + if (convergence >= 0.0) + XBT_INFO("Convergence within %g%% was achieved at time %g", + average_load_ratio, convergence); + else + XBT_INFO("Convergence within %g%% was not achieved", + average_load_ratio); XBT_VERB("Expected load was: %g", expected_load); XBT_VERB("Total computation for this process: %g", get_comp_amount()); + print_loads(true, xbt_log_priority_debug); +} + +double process::get_iter_deviation() const +{ + double average_cost = opt::comp_cost(total_load_average); // fixme: get locked? + // Do not count idle periods + double comp_iter_opt = acc.comp_amount / average_cost; +/* + // Add iterations that could have been achieved while beeing idle + // (kept for documentation) + double self_speed = MSG_get_host_speed(MSG_host_self()); + double average_duration = average_cost / self_speed; + comp_iter_opt += idle_duration / average_duration; +*/ + return comp_iter - comp_iter_opt; } int process::run() @@ -114,8 +168,6 @@ int process::run() void process::load_balance_loop() { - using std::placeholders::_1; - double next_iter_after_date = MSG_get_clock() + opt::min_lb_iter_duration; while (still_running()) { if (lb_iter == opt::comp_iter_delay) { @@ -127,13 +179,16 @@ void process::load_balance_loop() ++lb_iter; } + ctrl_receive(0.0); + mutex.acquire(); if (!opt::bookkeeping) expected_load = real_load - get_sum_of_to_send(); // nothing to do with opt::bookkeeping if (opt::log_rate && lb_iter % opt::log_rate == 0) { - XBT_INFO("(%u:%u) current load: %g", lb_iter, comp_iter, real_load); + XBT_INFO("(%u:%u:%u) current load: %g", + lb_iter, comp_iter, all_comp_iter, real_load); XBT_VERB("... expected load: %g", expected_load); } @@ -144,20 +199,19 @@ void process::load_balance_loop() // send comm.ctrl_flush(false); - std::for_each(neigh.begin(), neigh.end(), - std::bind(&process::ctrl_send, this, _1)); + for (neighbor& n : neigh) + ctrl_send(n); prev_load_broadcast = expected_load; mutex.release(); sleep_until_date(next_iter_after_date, opt::min_lb_iter_duration); - ctrl_receive(0.0); } XBT_VERB("Going to finalize for %s...", __func__); XBT_DEBUG("send CTRL_CLOSE to %zu neighbor%s", neigh.size(), ESSE(neigh.size())); - std::for_each(neigh.begin(), neigh.end(), - std::bind(&process::ctrl_close, this, _1)); + for (neighbor& n : neigh) + ctrl_close(n); while (ctrl_close_pending) { comm.ctrl_flush(false); XBT_DEBUG("waiting for %d CTRL_CLOSE", ctrl_close_pending); @@ -168,44 +222,52 @@ void process::load_balance_loop() void process::compute_loop() { - using std::placeholders::_1; - double next_iter_after_date = MSG_get_clock() + opt::min_comp_iter_duration; + double idle_since_date = 0.0; while (still_running()) { - // receive (do not block if there is something to compute) - data_receive(real_load > 0.0 ? 0.0 : opt::min_comp_iter_duration); + // receive + // if there is something to compute, do not block + // else, block the duration of an *lb* iteration + data_receive(real_load > 0.0 ? 0.0 : opt::min_lb_iter_duration); // send comm.data_flush(false); mutex.acquire(); real_load += received_load; received_load = 0.0; - std::for_each(neigh.begin(), neigh.end(), - std::bind(&process::data_send, this, _1)); + for (neighbor& n : neigh) + data_send(n); mutex.release(); + ++all_comp_iter; if (real_load == 0.0) continue; + convergence_check(); + // compute + idle_duration += MSG_get_clock() - idle_since_date; ++comp_iter; 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); + msg_task_t task = MSG_task_create("computation", flops, 0.0, NULL); + // MSG_task_set_category(task, TRACE_CAT_COMP); XBT_DEBUG("compute %g flop%s", flops, ESSE(flops)); MSG_task_execute(task); add_comp_amount(flops); MSG_task_destroy(task); + idle_since_date = MSG_get_clock(); + sleep_until_date(next_iter_after_date, opt::min_comp_iter_duration); } XBT_VERB("Going to finalize for %s...", __func__); + // Note: idle duration is not counted during finalization finalizing = true; XBT_DEBUG("send DATA_CLOSE to %zu neighbor%s", neigh.size(), ESSE(neigh.size())); - std::for_each(neigh.begin(), neigh.end(), - std::bind(&process::data_close, this, _1)); + for (neighbor& n : neigh) + data_close(n); while (data_close_pending) { comm.data_flush(false); XBT_DEBUG("waiting for %d DATA_CLOSE", data_close_pending); @@ -213,10 +275,39 @@ void process::compute_loop() } real_load += received_load; received_load = 0.0; + proc_mutex->acquire(); total_load_running -= real_load; + proc_mutex->release(); + convergence_check(); comm.data_flush(true); } +void process::convergence_check() +{ + double average = total_load_average; // fixme: get locked? + double load_diff = std::fabs(real_load - average); + bool converged = load_diff <= load_diff_threshold; + + if (converged) { + if (convergence < 0) { + XBT_VERB("current load has converged: %g (%.4g%%)", + real_load, 100.0 * load_diff / average); + convergence = MSG_get_clock(); + local_convergence_counter = opt::exit_on_convergence; + } + if (local_convergence_counter > 0 && --local_convergence_counter == 0) + --convergence_counter; + } else { + if (convergence >= 0.0) { + XBT_VERB("current load has diverged: %g (%.4g%%)", + real_load, 100.0 * load_diff / average); + convergence = -1.0; + if (local_convergence_counter == 0) + ++convergence_counter; + } + } +} + bool process::still_running() { static bool last_status = true; @@ -240,6 +331,10 @@ bool process::still_running() XBT_VERB("Reached comp_maxiter: %d/%d", comp_iter, opt::comp_maxiter); last_status = false; + } else if (opt::exit_on_convergence && convergence_counter == 0) { + XBT_VERB("Global convergence detected"); + last_status = false; + } else if (opt::exit_on_close && close_received) { XBT_VERB("Close received"); last_status = false; @@ -249,7 +344,7 @@ bool process::still_running() last_status = false; } else if (100.0 * total_load_running / total_load_init <= - opt::load_ratio_threshold) { + opt::load_ratio_threshold) { // fixme: get locked? // fixme: this check should be implemented with a distributed // algorithm, and not a shared global variable! XBT_VERB("No more load to balance in system."); @@ -261,12 +356,10 @@ bool process::still_running() double process::get_sum_of_to_send() const { - using std::placeholders::_1; - using std::placeholders::_2; - return std::accumulate(neigh.begin(), neigh.end(), 0.0, - std::bind(std::plus(), _1, - std::bind(&neighbor::get_to_send, _2))); + [](double x, const neighbor& neigh) { + return x + neigh.get_to_send(); + }); } void process::load_balance() @@ -302,26 +395,41 @@ void process::ctrl_send(neighbor& nb) } } +double process::compute_load_to_send(double desired) +{ + if (opt::integer_transfer) + desired = std::floor(desired); + return desired >= opt::min_transfer_amount ? desired : 0.0; +} + void process::data_send(neighbor& nb) { double load_to_send; - if (opt::bookkeeping) { - load_to_send = std::min(real_load, nb.get_debt()); - if (load_to_send >= opt::min_transfer_amount) { + if (opt::bookkeeping) { // bookkeeping + double excess_load; // load amount we are able to send + if (opt::egocentric) + excess_load = std::max(0.0, real_load - expected_load); + else + excess_load = real_load; + + double balance; + if (nb.get_credit() > 0.0) + balance = nb.get_debt() - nb.get_credit(); + else + balance = nb.get_debt(); + load_to_send = std::min(excess_load, + std::max(0.0, balance)); + + // adjust load to send (rounding, truncation, etc.) + load_to_send = compute_load_to_send(load_to_send); + if (load_to_send > 0.0) nb.set_debt(nb.get_debt() - load_to_send); - real_load -= load_to_send; - } else { - load_to_send = 0.0; - } - } else { - load_to_send = nb.get_to_send(); - if (load_to_send >= opt::min_transfer_amount) { - nb.set_to_send(0.0); - real_load -= load_to_send; - } else { - load_to_send = 0.0; - } + } else { // !bookkeeping + load_to_send = compute_load_to_send(nb.get_to_send()); + if (load_to_send > 0.0) + nb.set_to_send(nb.get_to_send() - load_to_send); } + real_load -= load_to_send; while (load_to_send > 0.0) { double amount; if (opt::max_transfer_amount) @@ -348,7 +456,7 @@ void process::data_close(neighbor& nb) void process::ctrl_receive(double timeout) { message* msg; - m_host_t from; + msg_host_t from; XBT_DEBUG("%sblocking receive on ctrl (%g)", "\0non-" + !timeout, timeout); while (ctrl_close_pending && comm.ctrl_recv(msg, from, timeout)) { @@ -362,7 +470,7 @@ void process::ctrl_receive(double timeout) void process::data_receive(double timeout) { message* msg; - m_host_t from; + msg_host_t from; XBT_DEBUG("%sblocking receive on data (%g)", "\0non-" + !timeout, timeout); while (data_close_pending && comm.data_recv(msg, from, timeout)) { @@ -373,18 +481,24 @@ void process::data_receive(double timeout) } } -void process::handle_message(message* msg, m_host_t from) +void process::handle_message(message* msg, msg_host_t from) { switch (msg->get_type()) { case message::CTRL: { neighbor* n = rev_neigh[from]; n->set_load(msg->get_amount() + n->get_to_send()); - expected_load += msg->get_credit(); // may be 0.0 if !opt::bookkeeping + if (opt::bookkeeping) { + double credit = msg->get_credit(); + expected_load += credit; + n->set_credit(n->get_credit() + credit); + } break; } case message::DATA: { + neighbor* n = rev_neigh[from]; double ld = msg->get_amount(); received_load += ld; + n->set_credit(n->get_credit() - ld); break; } case message::CTRL_CLOSE: @@ -399,27 +513,28 @@ void process::handle_message(message* msg, m_host_t from) delete msg; } -#define print_loads_generic(vec, verbose, logp, cat) \ - if (_XBT_LOG_ISENABLEDV((*cat), logp)) { \ - using std::placeholders::_1; \ - XBT_XCLOG(cat, logp, "My load: %g (real); %g (expected). " \ - "Neighbor loads:", real_load, expected_load); \ - std::for_each(vec.begin(), vec.end(), \ - std::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); + if (!_XBT_LOG_ISENABLEDV((*cat), logp)) + return; + XBT_XCLOG(cat, logp, "My load: %g (real); %g (expected). Neighbor loads:", + real_load, expected_load); + for (const neighbor& n : neigh) + n.print(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); + if (!_XBT_LOG_ISENABLEDV((*cat), logp)) + return; + XBT_XCLOG(cat, logp, "My load: %g (real); %g (expected). Neighbor loads:", + real_load, expected_load); + for (const neighbor* n : pneigh) + n->print(verbose, logp, cat); } #undef print_loads_generic