X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/e02d85948b5f10d8b37e39ec94d915c48f46a15a..e2e4118364b679f5bd7f6eae56c40ee6d039f5eb:/process.cpp?ds=inline diff --git a/process.cpp b/process.cpp index 1556f3c..eeb5d8c 100644 --- a/process.cpp +++ b/process.cpp @@ -1,24 +1,38 @@ -#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; +namespace { + + 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[]) { - 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); @@ -31,16 +45,22 @@ process::process(int argc, char* argv[]) rev_neigh.insert(std::make_pair(host, ptr)); } - expected_load = 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(); - } - if (neigh.size() > 0) - comm.listen(); + 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)) @@ -54,248 +74,310 @@ 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()); - print_loads(logp); + XBT_LOG(logp, "Got %s.", oss.str().c_str()); + print_loads(false, logp); } process::~process() { - total_load_exit += load; + delete compute_thread; + 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..."); - // first send() to inform neighbors about our load (force it) - prev_load_broadcast = -1; - iter = 0; - bool one_more = true; - do { - ++iter; - - if (opt::log_rate && iter % 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::load_balance_loop() +{ + 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) - 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:%u) current load: %g", + lb_iter, comp_iter, real_load); } - print_loads(xbt_log_priority_debug); - if (opt::bookkeeping) - expected_load -= load_balance(expected_load); - else - load -= load_balance(load); - - send(); - compute(); - -// NDS for Need To Send -#define NDS ((opt::bookkeeping ? expected_load : load) != prev_load_broadcast) - bool can_recv; - do { - // General idea: do not iterate if there is nothing to - // compute, nor to send. - - // fixme: review this chunk, and remove this NDS macro! - - bool recv_wait = (load == 0 && !NDS); - bool close_received = !receive(recv_wait? WAIT: NO_WAIT); - - if (opt::exit_on_close && close_received) - one_more = false; - else if (opt::maxiter && iter >= opt::maxiter) - one_more = false; - - can_recv = (ctrl_close_pending || data_close_pending); - - } while (one_more && can_recv && load == 0 && !NDS); -#undef NDS - - } while (one_more); - VERB0("Going to finalize..."); - finalize(); - - /* Open Questions : - * - definition of load on heterogeneous hosts ? - * - how to detect convergence ? - * - 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); - return 0; -} + if (get_load() > 0.0) + load_balance(); -double process::sum_of_to_send() const -{ - using namespace std::tr1; - using namespace std::tr1::placeholders; + print_loads(true, xbt_log_priority_debug); - return std::accumulate(neigh.begin(), neigh.end(), 0.0, - bind(std::plus(), - _1, bind(&neighbor::get_to_send, _2))); -} + // send + std::for_each(neigh.begin(), neigh.end(), + bind(&process::ctrl_send, this, _1)); -double process::load_balance(double /*my_load*/) -{ - if (iter == 1) - WARN0("process::load_balance is a no-op!"); - return 0.0; + 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::compute() +void process::compute_loop() { - 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)); + 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); - } else { - DEBUG0("nothing to compute !"); + + sleep_until_date(next_iter_after_date, opt::min_comp_iter_duration); + } + + XBT_VERB("Going to finalize for %s...", __func__); + 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); } -void process::send1_no_bookkeeping(neighbor& nb) +bool process::still_running() { - 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)); - nb.set_to_send(0.0); + 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! + // fixme: should this chunk be moved before call to receive() ? + XBT_VERB("No more load to balance in system."); + last_status = false; } + + return last_status; } -void process::send1_bookkeeping(neighbor& nb) +void process::load_balance() { - 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(); - if (debt_to_send > 0.0) { - comm.send(nb.get_ctrl_mbox(), - new message(message::CREDIT, debt_to_send)); - nb.set_to_send(0.0); - new_debt = nb.get_debt() + debt_to_send; - } else { - new_debt = nb.get_debt(); - } - if (load <= new_debt) { - load_to_send = load; - nb.set_debt(new_debt - load_to_send); - load = 0.0; - } else { - load_to_send = new_debt; - nb.set_debt(0.0); - load -= load_to_send; - } - if (load_to_send > 0.0) - comm.send(nb.get_data_mbox(), new message(message::LOAD, load_to_send)); + 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::send() +void process::print_loads_p(bool verbose, + e_xbt_log_priority_t logp, + xbt_log_category_t cat) const { - using namespace std::tr1; - using namespace std::tr1::placeholders; + 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) { - std::for_each(neigh.begin(), neigh.end(), - bind(&process::send1_bookkeeping, this, _1)); - prev_load_broadcast = expected_load; - } else { - std::for_each(neigh.begin(), neigh.end(), - bind(&process::send1_no_bookkeeping, this, _1)); - prev_load_broadcast = load; + 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)); + } } } -bool process::receive(recv_wait_mode wait) +void process::data_send(neighbor& nb) { - // DEBUG1("go for receive(%s)", - // "NO_WAIT\0WAIT\0\0\0\0WAIT_FOR_CLOSE" + 8 * wait); - 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)) { - 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: - load += msg->get_amount(); - 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; - 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; - break; + 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; } - delete msg; - do_recv = (wait == WAIT_FOR_CLOSE) && - (ctrl_close_pending || data_close_pending); + } else { + load_to_send = nb.get_to_send(); + nb.set_to_send(0.0); } - return result; + if (load_to_send > 0.0) + comm.data_send(nb.get_data_mbox(), + new message(message::LOAD, load_to_send)); } -void process::finalize1(neighbor& nb) +void process::ctrl_close(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.ctrl_send(nb.get_ctrl_mbox(), new message(message::CTRL_CLOSE, 0.0)); } -void process::finalize() +void process::data_close(neighbor& nb) { - using namespace std::tr1; - using namespace std::tr1::placeholders; - - DEBUG2("send CLOSE to %d neighbor%s.", - (int )neigh.size(), ESSE(neigh.size())); - std::for_each(neigh.begin(), neigh.end(), - bind(&process::finalize1, this, _1)); + comm.data_send(nb.get_data_mbox(), new message(message::DATA_CLOSE, 0.0)); +} - DEBUG2("wait for CLOSE from %d neighbor%s.", - (int )neigh.size(), ESSE(neigh.size())); - receive(WAIT_FOR_CLOSE); +void process::ctrl_receive(double timeout) +{ + message* msg; + m_host_t from; - comm.flush(true); + 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::print_loads(e_xbt_log_priority_t logp) +void process::data_receive(double timeout) { - if (!LOG_ISENABLED(logp)) - return; + message* msg; + m_host_t from; - 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(); + 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: