X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/97a4b4dbf628a627e3c2d5689be89265f56074df..50a00235743c59840ee2db2258e9e6dd7444f646:/process.cpp diff --git a/process.cpp b/process.cpp index 214b9d0..8b31678 100644 --- a/process.cpp +++ b/process.cpp @@ -15,6 +15,7 @@ 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[]) @@ -32,7 +33,9 @@ process::process(int argc, char* argv[]) rev_neigh.insert(std::make_pair(host, ptr)); } + 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(); @@ -40,7 +43,11 @@ process::process(int argc, char* argv[]) comm.next_close_on_ctrl_is_last(); comm.next_close_on_data_is_last(); } - if (neigh.size() > 0) + close_received = false; + may_receive = (neigh.size() > 0); // the same as (ctrl_close_pending || + // data_close_pending) + finalizing = false; + if (may_receive) comm.listen(); e_xbt_log_priority_t logp = xbt_log_priority_verbose; @@ -56,7 +63,7 @@ process::process(int argc, char* argv[]) oss << neigh.back().get_name(); } LOG1(logp, "Got %s.", oss.str().c_str()); - print_loads(true, logp); + print_loads(false, logp); } process::~process() @@ -68,54 +75,61 @@ 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; + while (true) { + if (load > 0.0) { + ++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); + } - if (opt::log_rate && iter % opt::log_rate == 0) { if (opt::bookkeeping) - INFO3("(%u) current load: %g ; expected: %g", - iter, load, expected_load); + expected_load -= load_balance(expected_load); else - INFO2("(%u) current load: %g", - iter, load); - } - print_loads(true, xbt_log_priority_debug); + load -= load_balance(load); - if (opt::bookkeeping) - expected_load -= load_balance(expected_load); - else - load -= load_balance(load); + print_loads(true, xbt_log_priority_debug); - send(); - compute(); + 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. + if (opt::maxiter && iter >= opt::maxiter) + break; + } else { + // send load information, and load when bookkeeping + send(); + } - // fixme: review this chunk, and remove this NDS macro! + // block on receiving unless there is something to compute or + // to send + bool recv_wait = (load == 0 && + ((opt::bookkeeping ? expected_load : load) + == prev_load_broadcast)); + DEBUG1("CALL RECEIVE(%s)", recv_wait? "WAIT": "NO_WAIT"); + receive(recv_wait? WAIT: NO_WAIT); - bool recv_wait = (load == 0 && !NDS); - bool close_received = !receive(recv_wait? WAIT: NO_WAIT); + // one of our neighbor is finalizing + if (opt::exit_on_close && close_received) + break; - 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); + // have no load and cannot receive anything + if (load == 0.0 && !may_receive) + break; - } while (one_more && can_recv && load == 0 && !NDS); -#undef NDS + // fixme: this check should be implemented with a distributed + // algorithm, and not a shared global variable! + if (100.0 * total_load_running / total_load_init <= + opt::load_ratio_threshold) { + VERB0("No more load to balance in system, stopping."); + break; + } - } while (one_more); + } VERB0("Going to finalize..."); finalize(); @@ -218,15 +232,14 @@ void process::send() } } -bool process::receive(recv_wait_mode wait) +void 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; - bool do_recv = ctrl_close_pending || data_close_pending; - while (do_recv && comm.recv(msg, from, wait)) { + bool do_wait = (wait != NO_WAIT); + while (may_receive && comm.recv(msg, from, do_wait)) { switch (msg->get_type()) { case message::INFO: { neighbor* n = rev_neigh[from]; @@ -236,33 +249,36 @@ 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; + // DEBUG1("ctrl_close_pending = %d", 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; + // DEBUG1("data_close_pending = %d", data_close_pending); + close_received = true; break; } delete msg; - do_recv = (wait == WAIT_FOR_CLOSE) && - (ctrl_close_pending || data_close_pending); + may_receive = (ctrl_close_pending || data_close_pending); + do_wait = (wait == WAIT_FOR_CLOSE); } - 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)); + comm.send(nb.get_data_mbox(), new message(message::DATA_CLOSE, 0.0)); } void process::finalize() @@ -270,6 +286,9 @@ void process::finalize() using namespace std::tr1; using namespace std::tr1::placeholders; + finalizing = true; + total_load_running -= load; + DEBUG2("send CLOSE to %d neighbor%s.", (int )neigh.size(), ESSE(neigh.size())); std::for_each(neigh.begin(), neigh.end(),