X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/e02d85948b5f10d8b37e39ec94d915c48f46a15a..bc691c290cd062a5c929b94d32b92f18ef5d235b:/process.cpp?ds=sidebyside diff --git a/process.cpp b/process.cpp index 1556f3c..0f53576 100644 --- a/process.cpp +++ b/process.cpp @@ -1,5 +1,3 @@ -#include "process.h" - #include #include #include @@ -8,12 +6,16 @@ #include #include #include + +XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); + #include "misc.h" #include "options.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[]) @@ -31,16 +33,16 @@ process::process(int argc, char* argv[]) rev_neigh.insert(std::make_pair(host, ptr)); } + comp = 0.0; + + prev_load_broadcast = -1; // force sending of load on first send() expected_load = load; + total_load_running += load; total_load_init += 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; e_xbt_log_priority_t logp = xbt_log_priority_verbose; if (!LOG_ISENABLED(logp)) @@ -55,7 +57,7 @@ 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() @@ -65,56 +67,94 @@ process::~process() int process::run() { + double next_iter_after_date = 0.0; 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) { - if (opt::bookkeeping) - INFO3("(%u) current load: %g ; expected: %g", - iter, load, expected_load); - else - INFO2("(%u) current load: %g", - iter, load); + comp_iter = lb_iter = 0; + while (true) { + if (opt::min_iter_duration) { + double now = MSG_get_clock(); + if (now < next_iter_after_date){ + double delay = next_iter_after_date - now; + DEBUG1("sleeping for %g s", delay); + MSG_process_sleep(delay); + } + next_iter_after_date = MSG_get_clock() + opt::min_iter_duration; } - print_loads(xbt_log_priority_debug); - if (opt::bookkeeping) - expected_load -= load_balance(expected_load); - else - load -= load_balance(load); + double ld = lb_load(); + if (ld > 0.0) { + ++lb_iter; - send(); - compute(); + 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, load, expected_load); + else + INFO2("(%u) current load: %g", + lb_iter, load); + } -// 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. + ld -= load_balance(ld); - // fixme: review this chunk, and remove this NDS macro! + print_loads(true, xbt_log_priority_debug); + } + lb_load() = ld; - bool recv_wait = (load == 0 && !NDS); - bool close_received = !receive(recv_wait? WAIT: NO_WAIT); + // send load information, and load (data) if any + send(); + if (load > 0.0) { + ++comp_iter; + compute(); + } + + 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; + } + + // block on receiving unless there is something to compute or + // to send + double timeout; + if (load != 0 || lb_load() != prev_load_broadcast) + timeout = 0.0; + else if (opt::min_iter_duration) + timeout = opt::min_iter_duration; + else + timeout = 1.0; + receive(timeout); - 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); + // one of our neighbor is finalizing + if (opt::exit_on_close && close_received) { + VERB0("Close received"); + break; + } - } while (one_more && can_recv && load == 0 && !NDS); -#undef NDS + // have no load and cannot receive anything + if (load == 0.0 && !may_receive()) { + VERB0("I'm a poor lonesome process, and I have no load..."); + break; + } - } while (one_more); + // 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(); @@ -125,16 +165,24 @@ int process::run() */ VERB0("Done."); - INFO3("Final load after %d iteration%s: %g", iter, ESSE(iter), load); - if (opt::bookkeeping) - INFO1("Expected load: %g", expected_load); + if (opt::bookkeeping) { + INFO4("Final load after %d:%d iterations: %g ; expected: %g", + lb_iter, comp_iter, load, expected_load); + } else { + INFO2("Final load after %d iterations: %g", + lb_iter, load); + if (lb_iter != comp_iter) + WARN2("lb_iter (%d) and comp_iter (%d) differ!", + lb_iter, comp_iter); + } return 0; } double process::sum_of_to_send() const { - using namespace std::tr1; - using namespace std::tr1::placeholders; + 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(), @@ -143,18 +191,19 @@ double process::sum_of_to_send() const double process::load_balance(double /*my_load*/) { - if (iter == 1) - WARN0("process::load_balance is a no-op!"); + if (lb_iter == 1) // warn only once + WARN0("process::load_balance() is a no-op!"); return 0.0; } 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)); + double flops = opt::comp_cost(load); + m_task_t task = MSG_task_create("computation", flops, 0.0, NULL); + DEBUG2("compute %g flop%s", flops, ESSE(flops)); MSG_task_execute(task); + comp += flops; MSG_task_destroy(task); } else { DEBUG0("nothing to compute !"); @@ -203,8 +252,8 @@ void process::send1_bookkeeping(neighbor& nb) void process::send() { - using namespace std::tr1; - using namespace std::tr1::placeholders; + using std::tr1::bind; + using std::tr1::placeholders::_1; if (opt::bookkeeping) { std::for_each(neigh.begin(), neigh.end(), @@ -215,17 +264,16 @@ void process::send() bind(&process::send1_no_bookkeeping, this, _1)); prev_load_broadcast = load; } + comm.flush(false); } -bool 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); - 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]; @@ -235,69 +283,82 @@ 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(); + 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 -= 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); + DEBUG2("wait for CLOSE from %lu neighbor%s", + (unsigned long )neigh.size(), ESSE(neigh.size())); + while (may_receive()) { + comm.flush(false); + 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: