X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/f29b38ef2a056daa14bbfda2fce78063faa773d4..f620be5869815a0dccd5b37089c2ee91399915e4:/process.cpp diff --git a/process.cpp b/process.cpp index 8ceb469..bc71b9d 100644 --- a/process.cpp +++ b/process.cpp @@ -1,81 +1,185 @@ #include -#include +#include #include #include #include #include +#include #include "misc.h" +#include "options.h" #include "process.h" XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simu); -struct message { - double measure; - double transfer; -}; - -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"); + neigh.assign(argv + 2, argv + argc); + expected_load = 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(); + 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); } +int process::run() +{ + bool one_more = true; + unsigned iter = 0; + + INFO1("Initial load: %g", load); + VERB0("Starting..."); + while (one_more) { + bool close_received; + ++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); + } + + compute(); + close_received = !receive(false); + + /* + * compute load balancing; + * send tasks to neighbors; + */ + + comm.flush(false); + + if (opt::exit_on_close && close_received) + one_more = false; + if (opt::maxiter && iter >= opt::maxiter) + one_more = false; + } + VERB0("Going to finalize..."); + finalize(); + + /* Open Questions : + * - definition of load on heterogeneous hosts ? + * - how to detect convergence ? + * - how to manage link failures ? + */ + + VERB0("Done."); + 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); + return 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); +} + + +// Returns false if a CLOSE message was received. +bool process::receive(bool wait_for_close) +{ + 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)); + switch (msg->get_type()) { + case message::INFO: + // fixme: update neighbor + // need a map m_host_t -> neighbor& + 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; + } + delete msg; + } + return result; +} + +void process::finalize() +{ + 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)); + } + + DEBUG2("wait for CLOSE from %d neighbor%s.", + (int )neigh.size(), ESSE(neigh.size())); + receive(true); + + comm.flush(true); +} + void process::print_loads(e_xbt_log_priority_t logp) { if (!LOG_ISENABLED(logp)) return; + std::ostringstream oss; if (neigh.empty()) { oss << "no neighbor!"; } else { std::transform(neigh.begin(), neigh.end() - 1, std::ostream_iterator(oss, ", "), - std::mem_fun_ref(&neighbor::getLoad)); - oss << neigh.back().getLoad(); + std::tr1::mem_fn(&neighbor::get_load)); + oss << neigh.back().get_load(); } LOG1(logp, "Neighbor loads: %s", oss.str().c_str()); } -int process::run() -{ - 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? - - return 0; -} - // Local variables: // mode: c++ // End: