X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/d47d44b2ed067c834ef210ad544512e7581a1c8e..cd83ecda6b4c36b2face63122fe1e09d6ffa2fe0:/process.cpp?ds=inline diff --git a/process.cpp b/process.cpp index 7605818..f997d99 100644 --- a/process.cpp +++ b/process.cpp @@ -1,88 +1,389 @@ #include -#include +#include #include #include #include #include +#include + +XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); + #include "misc.h" #include "options.h" +#include "tracing.h" + #include "process.h" -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simu); +double process::total_load_init = 0.0; +double process::total_load_running = 0.0; +double process::total_load_exit = 0.0; + +namespace { -struct message { - double measure; - double transfer; -}; + void sleep_until_date(double& date, double duration = 0.0) + { + double sleep_duration = date - MSG_get_clock(); + if (sleep_duration > 0.0) + MSG_process_sleep(sleep_duration); + date = MSG_get_clock() + duration; + } + +} -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"); + 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); + + 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_all() + expected_load = real_load; + total_load_running += real_load; + total_load_init += real_load; + + ctrl_close_pending = data_close_pending = neigh.size(); + close_received = false; + finalizing = false; + + comp_iter = lb_iter = 0; + + compute_thread = new_msg_thread("compute", + std::tr1::bind(&process::compute_loop, + this)); + 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); + XBT_LOG(logp, "Got %s.", oss.str().c_str()); + print_loads(false, logp); } -int process::run() +process::~process() { - 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; - * } - */ - - /* Open Questions : - * - definition of load on heterogeneous hosts ? - * - how to detect convergence ? - * - how to manage link failures ? - */ - - // xxx: shall we retrieve pending tasks? + delete compute_thread; + total_load_exit += real_load; + if (opt::log_rate < 0) + return; + 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:%d iterations: %g", + lb_iter, comp_iter, real_load); + } + XBT_VERB("Total computation for this process: %g", comp); +} +int process::run() +{ + if (opt::log_rate >= 0) + XBT_INFO("Initial load: %g", real_load); + XBT_VERB("Starting..."); + compute_thread->start(); + load_balance_loop(); + compute_thread->wait(); + XBT_VERB("Done."); return 0; } -void process::compute() +void process::load_balance_loop() { - double duration = opt::comp_cost(load); - m_task_t task = MSG_task_create("computation", duration, 0.0, NULL); - MSG_task_execute(task); - MSG_task_destroy(task); + using std::tr1::bind; + using std::tr1::placeholders::_1; + + double next_iter_after_date = MSG_get_clock() + opt::min_lb_iter_duration; + while (still_running()) { + ++lb_iter; + + if (opt::log_rate && lb_iter % opt::log_rate == 0) { + if (opt::bookkeeping) + XBT_INFO("(%u:%u) current load: %g ; expected: %g", + lb_iter, comp_iter, real_load, expected_load); + else + XBT_INFO("(%u:%u) current load: %g", + lb_iter, comp_iter, real_load); + } + + if (get_load() > 0.0) + load_balance(); + + print_loads(true, xbt_log_priority_debug); + + // send + std::for_each(neigh.begin(), neigh.end(), + bind(&process::ctrl_send, this, _1)); + prev_load_broadcast = get_load(); + + sleep_until_date(next_iter_after_date, opt::min_lb_iter_duration); + ctrl_receive(0.0); + + comm.ctrl_flush(false); + } + + 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(), + bind(&process::ctrl_close, this, _1)); + while (ctrl_close_pending) { + comm.ctrl_flush(false); + XBT_DEBUG("waiting for %d CTRL CLOSE", ctrl_close_pending); + ctrl_receive(-1.0); + } + comm.ctrl_flush(true); } -void process::print_loads(e_xbt_log_priority_t logp) +void process::compute_loop() { - if (!LOG_ISENABLED(logp)) - return; - std::ostringstream oss; - if (neigh.empty()) { - oss << "no neighbor!"; + using std::tr1::bind; + using std::tr1::placeholders::_1; + + double next_iter_after_date = MSG_get_clock() + opt::min_comp_iter_duration; + while (still_running()) { + // receive + if (real_load > 0.0) + data_receive(0.0); + else + data_receive(opt::min_comp_iter_duration); + + comm.data_flush(false); + + if (real_load == 0.0) + continue; + + // send + std::for_each(neigh.begin(), neigh.end(), + bind(&process::data_send, this, _1)); + + // compute + ++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); + XBT_DEBUG("compute %g flop%s", flops, ESSE(flops)); + MSG_task_execute(task); + comp += flops; + MSG_task_destroy(task); + + sleep_until_date(next_iter_after_date, opt::min_comp_iter_duration); + } + + XBT_VERB("Going to finalize for %s...", __func__); + // last send, for not losing load scheduled to be sent + std::for_each(neigh.begin(), neigh.end(), + bind(&process::data_send, this, _1)); + finalizing = true; + total_load_running -= real_load; + XBT_DEBUG("send DATA_CLOSE to %zu neighbor%s", + neigh.size(), ESSE(neigh.size())); + std::for_each(neigh.begin(), neigh.end(), + bind(&process::data_close, this, _1)); + while (data_close_pending) { + comm.data_flush(false); + XBT_DEBUG("waiting for %d DATA CLOSE", data_close_pending); + data_receive(-1.0); + } + comm.data_flush(true); +} + +bool process::still_running() +{ + static bool last_status = true; + + if (!last_status) { + /* nop */ + + } else if (opt::time_limit && MSG_get_clock() >= opt::time_limit) { + XBT_VERB("Reached time limit: %g/%g", MSG_get_clock(), opt::time_limit); + last_status = false; + + } else if (opt::lb_maxiter && lb_iter >= opt::lb_maxiter) { + XBT_VERB("Reached lb_maxiter: %d/%d", lb_iter, opt::lb_maxiter); + last_status = false; + + } else if (opt::comp_maxiter && comp_iter >= opt::comp_maxiter) { + XBT_VERB("Reached comp_maxiter: %d/%d", comp_iter, opt::comp_maxiter); + last_status = false; + + } else if (opt::exit_on_close && close_received) { + XBT_VERB("Close received"); + last_status = false; + + } else if (real_load == 0.0 && !data_close_pending) { + XBT_VERB("I'm a poor lonesome process, and I have no load..."); + last_status = false; + + } else if (100.0 * total_load_running / total_load_init <= + opt::load_ratio_threshold) { + // 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."); + last_status = false; + } + + return last_status; +} + +void process::load_balance() +{ + if (lb_iter == 1) // warn only once + XBT_WARN("process::load_balance() is a no-op!"); +} + +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); +} + +#define print_loads_generic(vec, verbose, logp, cat) \ + if (_XBT_LOG_ISENABLEDV((*cat), logp)) { \ + using std::tr1::bind; \ + using std::tr1::placeholders::_1; \ + XBT_XCLOG(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 + +void process::ctrl_send(neighbor& nb) +{ + double info_to_send = get_load(); + if (info_to_send != prev_load_broadcast) + comm.ctrl_send(nb.get_ctrl_mbox(), + new message(message::INFO, info_to_send)); + if (opt::bookkeeping) { + double debt_to_send = nb.get_to_send(); + if (debt_to_send > 0.0) { + nb.set_to_send(0.0); + nb.set_debt(nb.get_debt() + debt_to_send); + comm.ctrl_send(nb.get_ctrl_mbox(), + new message(message::CREDIT, debt_to_send)); + } + } +} + +void process::data_send(neighbor& nb) +{ + double load_to_send; + if (opt::bookkeeping) { + if (real_load <= nb.get_debt()) { + load_to_send = real_load; + nb.set_debt(nb.get_debt() - load_to_send); + real_load = 0.0; + } else { + load_to_send = nb.get_debt(); + nb.set_debt(0.0); + real_load -= load_to_send; + } } else { - std::transform(neigh.begin(), neigh.end() - 1, - std::ostream_iterator(oss, ", "), - std::mem_fun_ref(&neighbor::getLoad)); - oss << neigh.back().getLoad(); + load_to_send = nb.get_to_send(); + nb.set_to_send(0.0); + // do not update real_load here + } + if (load_to_send > 0.0) + comm.data_send(nb.get_data_mbox(), + new message(message::LOAD, load_to_send)); +} + +void process::ctrl_close(neighbor& nb) +{ + comm.ctrl_send(nb.get_ctrl_mbox(), new message(message::CTRL_CLOSE, 0.0)); +} + +void process::data_close(neighbor& nb) +{ + comm.data_send(nb.get_data_mbox(), new message(message::DATA_CLOSE, 0.0)); +} + +void process::ctrl_receive(double timeout) +{ + message* msg; + m_host_t from; + + XBT_DEBUG("%sblocking receive on ctrl (%g)", "\0non-" + !timeout, timeout); + while (ctrl_close_pending && comm.ctrl_recv(msg, from, timeout)) { + handle_message(msg, from); + timeout = 0.0; + } +} + +void process::data_receive(double timeout) +{ + message* msg; + m_host_t from; + + XBT_DEBUG("%sblocking receive on data (%g)", "\0non-" + !timeout, timeout); + while (data_close_pending && comm.data_recv(msg, from, timeout)) { + handle_message(msg, from); + timeout = 0.0; + } +} + +void process::handle_message(message* msg, m_host_t from) +{ + 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(); + real_load += ld; + if (finalizing) + total_load_running -= ld; + break; + } + case message::CTRL_CLOSE: + ctrl_close_pending--; + close_received = true; + break; + case message::DATA_CLOSE: + data_close_pending--; + close_received = true; + break; } - LOG1(logp, "Neighbor loads: %s", oss.str().c_str()); + delete msg; } // Local variables: