X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/f620be5869815a0dccd5b37089c2ee91399915e4..035e2d971fc603174fa4c6883359f02d34b77226:/process.cpp?ds=inline diff --git a/process.cpp b/process.cpp index bc71b9d..1556f3c 100644 --- a/process.cpp +++ b/process.cpp @@ -1,23 +1,38 @@ +#include "process.h" + #include #include #include +#include #include #include #include #include #include "misc.h" #include "options.h" -#include "process.h" -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simu); +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[]) { 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); + + 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) { @@ -43,15 +58,20 @@ process::process(int argc, char* argv[]) print_loads(logp); } -int process::run() +process::~process() { - bool one_more = true; - unsigned iter = 0; + total_load_exit += load; +} +int process::run() +{ INFO1("Initial load: %g", load); VERB0("Starting..."); - while (one_more) { - bool close_received; + // 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) { @@ -62,22 +82,39 @@ int process::run() INFO2("(%u) current load: %g", iter, load); } + print_loads(xbt_log_priority_debug); + if (opt::bookkeeping) + expected_load -= load_balance(expected_load); + else + load -= load_balance(load); + + send(); compute(); - close_received = !receive(false); - /* - * compute load balancing; - * send tasks to neighbors; - */ +// 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. - comm.flush(false); + // fixme: review this chunk, and remove this NDS macro! - if (opt::exit_on_close && close_received) - one_more = false; - if (opt::maxiter && iter >= opt::maxiter) - one_more = false; - } + 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(); @@ -88,40 +125,113 @@ 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; } +double process::sum_of_to_send() const +{ + using namespace std::tr1; + using namespace std::tr1::placeholders; + + return std::accumulate(neigh.begin(), neigh.end(), 0.0, + bind(std::plus(), + _1, bind(&neighbor::get_to_send, _2))); +} + +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); - 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); + 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 { + DEBUG0("nothing to compute !"); + } +} + +void process::send1_no_bookkeeping(neighbor& nb) +{ + 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); + } +} + +void process::send1_bookkeeping(neighbor& nb) +{ + 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)); } +void process::send() +{ + using namespace std::tr1; + using namespace std::tr1::placeholders; + + 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; + } +} -// 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: - // fixme: update neighbor - // need a map m_host_t -> neighbor& + case message::INFO: { + neighbor* n = rev_neigh[from]; + n->set_load(msg->get_amount()); break; + } case message::CREDIT: expected_load += msg->get_amount(); break; @@ -142,23 +252,31 @@ bool process::receive(bool wait_for_close) break; } delete msg; + do_recv = (wait == WAIT_FOR_CLOSE) && + (ctrl_close_pending || data_close_pending); } return result; } +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)); +} + void process::finalize() { + using namespace std::tr1; + using namespace std::tr1::placeholders; + DEBUG2("send CLOSE to %d neighbor%s.", (int )neigh.size(), ESSE(neigh.size())); - std::vector::iterator n; - for (n = neigh.begin() ; n != neigh.end() ; ++n) { - comm.send(n->get_ctrl_mbox(), new message(message::CTRL_CLOSE, 0.0)); - comm.send(n->get_data_mbox(), new message(message::DATA_CLOSE, 0.0)); - } + 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(true); + receive(WAIT_FOR_CLOSE); comm.flush(true); }