X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/325b135f0ee33c6c0242a14e2f58a54fb571b032..e02d85948b5f10d8b37e39ec94d915c48f46a15a:/process.cpp?ds=sidebyside diff --git a/process.cpp b/process.cpp index 9988def..1556f3c 100644 --- a/process.cpp +++ b/process.cpp @@ -13,24 +13,26 @@ XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc); +double process::total_load_init = 0.0; +double process::total_load_exit = 0.0; + process::process(int argc, char* argv[]) { - using namespace std::tr1; - using namespace std::tr1::placeholders; - if (argc < 2 || !(std::istringstream(argv[1]) >> load)) - throw std::invalid_argument("bad or missing initial load"); + throw std::invalid_argument("bad or missing initial load parameter"); neigh.assign(argv + 2, argv + argc); - std::for_each(neigh.begin(), neigh.end(), - bind(&process::insert_neighbor_in_map, this, _1)); - - pneigh.resize(neigh.size()); - std::transform(neigh.begin(), neigh.end(), pneigh.begin(), - misc::address()); + 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)); + } expected_load = load; + total_load_init += load; ctrl_close_pending = data_close_pending = neigh.size(); if (neigh.size() == 1) { @@ -49,7 +51,7 @@ process::process(int argc, char* argv[]) oss << ESSE(neigh.size()) << ": "; std::transform(neigh.begin(), neigh.end() - 1, std::ostream_iterator(oss, ", "), - mem_fn(&neighbor::get_name)); + std::tr1::mem_fn(&neighbor::get_name)); oss << neigh.back().get_name(); } LOG1(logp, "Got %s.", oss.str().c_str()); @@ -58,18 +60,18 @@ process::process(int argc, char* argv[]) process::~process() { + total_load_exit += load; } int process::run() { - bool one_more = true; - INFO1("Initial load: %g", load); VERB0("Starting..."); - // first send to inform neighbors about our load - send(); + // first send() to inform neighbors about our load (force it) + prev_load_broadcast = -1; iter = 0; - while (one_more) { + bool one_more = true; + do { ++iter; if (opt::log_rate && iter % opt::log_rate == 0) { @@ -80,10 +82,7 @@ int process::run() INFO2("(%u) current load: %g", iter, load); } - - compute(); - - bool close_received = !receive(false); + print_loads(xbt_log_priority_debug); if (opt::bookkeeping) expected_load -= load_balance(expected_load); @@ -91,12 +90,31 @@ int process::run() load -= load_balance(load); send(); + compute(); - if (opt::exit_on_close && close_received) - one_more = false; - if (opt::maxiter && iter >= opt::maxiter) - one_more = false; - } +// 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(); @@ -107,11 +125,9 @@ int process::run() */ VERB0("Done."); + INFO3("Final load after %d iteration%s: %g", iter, ESSE(iter), load); if (opt::bookkeeping) - INFO4("Final load after %d iteration%s: %g ; expected: %g", - iter, ESSE(iter), load, expected_load); - else - INFO3("Final load after %d iteration%s: %g", iter, ESSE(iter), load); + INFO1("Expected load: %g", expected_load); return 0; } @@ -127,27 +143,28 @@ 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!"); return 0.0; } void process::compute() { - // fixme: shall we do something special when duration is 0 ? - double duration = opt::comp_cost(load); - if (duration > 0) { + 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)); MSG_task_execute(task); MSG_task_destroy(task); } else { - xbt_sleep(42); - // xbt_thread_yield(); + DEBUG0("nothing to compute !"); } } void process::send1_no_bookkeeping(neighbor& nb) { - comm.send(nb.get_ctrl_mbox(), new message(message::INFO, load)); + 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)); @@ -157,7 +174,9 @@ void process::send1_no_bookkeeping(neighbor& nb) void process::send1_bookkeeping(neighbor& nb) { - comm.send(nb.get_ctrl_mbox(), new message(message::INFO, expected_load)); + 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(); @@ -187,25 +206,26 @@ void process::send() using namespace std::tr1; using namespace std::tr1::placeholders; - // fixme: shall we send data at all iterations? - if (opt::bookkeeping) + if (opt::bookkeeping) { std::for_each(neigh.begin(), neigh.end(), bind(&process::send1_bookkeeping, this, _1)); - else + prev_load_broadcast = expected_load; + } else { std::for_each(neigh.begin(), neigh.end(), bind(&process::send1_no_bookkeeping, this, _1)); + prev_load_broadcast = load; + } } -// Returns false if a CLOSE message was received. -bool process::receive(bool wait_for_close) +bool process::receive(recv_wait_mode wait) { + // 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; - while ((ctrl_close_pending || - data_close_pending) && comm.recv(msg, from, wait_for_close)) { - DEBUG2("received %s from %s", - msg->to_string().c_str(), MSG_host_get_name(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]; @@ -232,6 +252,8 @@ bool process::receive(bool wait_for_close) break; } delete msg; + do_recv = (wait == WAIT_FOR_CLOSE) && + (ctrl_close_pending || data_close_pending); } return result; } @@ -254,7 +276,7 @@ void process::finalize() DEBUG2("wait for CLOSE from %d neighbor%s.", (int )neigh.size(), ESSE(neigh.size())); - receive(true); + receive(WAIT_FOR_CLOSE); comm.flush(true); } @@ -276,13 +298,6 @@ void process::print_loads(e_xbt_log_priority_t logp) LOG1(logp, "Neighbor loads: %s", oss.str().c_str()); } -void process::insert_neighbor_in_map(neighbor& nb) -{ - neighbor* nbp = &nb; - m_host_t host = MSG_get_host_by_name(nb.get_name()); - rev_neigh.insert(std::make_pair(host, nbp)); -} - // Local variables: // mode: c++ // End: