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<neighbor>());
+ 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;
oss << ESSE(neigh.size()) << ": ";
std::transform(neigh.begin(), neigh.end() - 1,
std::ostream_iterator<const char*>(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());
INFO1("Initial load: %g", load);
VERB0("Starting...");
- // first send to inform neighbors about our load
+ // first send() to inform neighbors about our load (force it)
+ prev_load_broadcast = !(opt::bookkeeping? expected_load: load);
send();
iter = 0;
while (one_more) {
- ++iter;
-
if (opt::log_rate && iter % opt::log_rate == 0) {
if (opt::bookkeeping)
INFO3("(%u) current load: %g ; expected: %g",
INFO2("(%u) current load: %g",
iter, load);
}
+ print_loads(xbt_log_priority_debug);
- compute();
+ bool do_compute = load > 0.0;
+ if (do_compute) {
+ compute();
+ ++iter;
+ }
- bool close_received = !receive(false);
+ bool close_received = !receive(do_compute? NO_WAIT: WAIT);
if (opt::bookkeeping)
expected_load -= load_balance(expected_load);
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) {
- 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();
- }
+ 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);
}
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));
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();
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)
{
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];
break;
}
delete msg;
+ do_recv = (wait == WAIT_FOR_CLOSE) &&
+ (ctrl_close_pending || data_close_pending);
}
return result;
}
DEBUG2("wait for CLOSE from %d neighbor%s.",
(int )neigh.size(), ESSE(neigh.size()));
- receive(true);
+ receive(WAIT_FOR_CLOSE);
comm.flush(true);
}
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:
