#include <algorithm>
+#include <cmath>
#include <functional>
#include <iterator>
#include <numeric>
expected_load = real_load;
total_load_running += real_load;
total_load_init += real_load;
+ received_load = 0.0;
ctrl_close_pending = data_close_pending = neigh.size();
close_received = false;
{
delete lb_thread;
total_load_exit += real_load;
+ xbt_assert(received_load == 0.0,
+ "received_load is %g, but should be 0.0 !", received_load);
if (opt::log_rate < 0)
return;
XBT_INFO("Final load after %d:%d iterations: %g",
++lb_iter;
}
+ ctrl_receive(0.0);
+
mutex.acquire();
if (!opt::bookkeeping)
expected_load = real_load - get_sum_of_to_send();
mutex.release();
sleep_until_date(next_iter_after_date, opt::min_lb_iter_duration);
- ctrl_receive(0.0);
}
XBT_VERB("Going to finalize for %s...", __func__);
std::bind(&process::ctrl_close, this, _1));
while (ctrl_close_pending) {
comm.ctrl_flush(false);
- XBT_DEBUG("waiting for %d CTRL CLOSE", ctrl_close_pending);
+ XBT_DEBUG("waiting for %d CTRL_CLOSE", ctrl_close_pending);
ctrl_receive(-1.0);
}
comm.ctrl_flush(true);
double next_iter_after_date = MSG_get_clock() + opt::min_comp_iter_duration;
while (still_running()) {
- // receive
- mutex.acquire();
- if (real_load > 0.0)
- data_receive(0.0);
- else
- data_receive(opt::min_comp_iter_duration);
- mutex.release();
+ // receive (do not block if there is something to compute)
+ data_receive(real_load > 0.0 ? 0.0 : opt::min_comp_iter_duration);
// send
comm.data_flush(false);
mutex.acquire();
+ real_load += received_load;
+ received_load = 0.0;
std::for_each(neigh.begin(), neigh.end(),
std::bind(&process::data_send, this, _1));
mutex.release();
}
XBT_VERB("Going to finalize for %s...", __func__);
- // last send, for not losing load scheduled to be sent
- std::for_each(neigh.begin(), neigh.end(),
- std::bind(&process::data_send, this, _1));
finalizing = true;
- total_load_running -= real_load;
XBT_DEBUG("send DATA_CLOSE to %zu neighbor%s",
neigh.size(), ESSE(neigh.size()));
std::for_each(neigh.begin(), neigh.end(),
std::bind(&process::data_close, this, _1));
while (data_close_pending) {
comm.data_flush(false);
- XBT_DEBUG("waiting for %d DATA CLOSE", data_close_pending);
+ XBT_DEBUG("waiting for %d DATA_CLOSE", data_close_pending);
data_receive(-1.0);
}
+ real_load += received_load;
+ received_load = 0.0;
+ total_load_running -= real_load;
comm.data_flush(true);
}
void process::ctrl_send(neighbor& nb)
{
double info_to_send = expected_load;
- if (info_to_send != prev_load_broadcast) {
- message* msg = new message(message::INFO, info_to_send);
- add_ctrl_send_mesg(msg->get_size());
- comm.ctrl_send(nb.get_ctrl_mbox(), msg);
- }
- if (opt::bookkeeping) {
- double debt_to_send = nb.get_to_send();
+ double debt_to_send;
+ if (opt::bookkeeping) { // bookkeeping
+ debt_to_send = nb.get_to_send();
if (debt_to_send > 0.0) {
nb.set_to_send(0.0);
nb.set_debt(nb.get_debt() + debt_to_send);
- message* msg = new message(message::CREDIT, debt_to_send);
- add_ctrl_send_mesg(msg->get_size());
- comm.ctrl_send(nb.get_ctrl_mbox(), msg);
}
+ } else { // !bookkeeping
+ debt_to_send = 0.0;
}
+ if (info_to_send != prev_load_broadcast || debt_to_send > 0.0) {
+ message* msg = new message(message::CTRL, info_to_send, debt_to_send);
+ add_ctrl_send_mesg(msg->get_size());
+ comm.ctrl_send(nb.get_ctrl_mbox(), msg);
+ }
+}
+
+double process::compute_load_to_send(double desired)
+{
+ if (opt::integer_transfer)
+ desired = std::floor(desired);
+ return desired >= opt::min_transfer_amount ? desired : 0.0;
}
void process::data_send(neighbor& nb)
{
double load_to_send;
if (opt::bookkeeping) {
- load_to_send = std::min(real_load, nb.get_debt());
- if (load_to_send >= opt::min_transfer_amount) {
+ load_to_send = compute_load_to_send(std::min(real_load, nb.get_debt()));
+ if (load_to_send > 0.0)
nb.set_debt(nb.get_debt() - load_to_send);
- real_load -= load_to_send;
- } else {
- load_to_send = 0.0;
- }
} else {
- load_to_send = nb.get_to_send();
- if (load_to_send >= opt::min_transfer_amount) {
- nb.set_to_send(0.0);
- real_load -= load_to_send;
- } else {
- load_to_send = 0.0;
- }
+ load_to_send = compute_load_to_send(nb.get_to_send());
+ if (load_to_send > 0.0)
+ nb.set_to_send(nb.get_to_send() - load_to_send);
}
+ real_load -= load_to_send;
while (load_to_send > 0.0) {
double amount;
if (opt::max_transfer_amount)
amount = std::min(load_to_send, opt::max_transfer_amount);
else
amount = load_to_send;
- message* msg = new message(message::LOAD, amount);
+ message* msg = new message(message::DATA, amount);
add_data_send_mesg(msg->get_size());
comm.data_send(nb.get_data_mbox(), msg);
load_to_send -= amount;
void process::handle_message(message* msg, m_host_t from)
{
switch (msg->get_type()) {
- case message::INFO: {
+ case message::CTRL: {
neighbor* n = rev_neigh[from];
n->set_load(msg->get_amount() + n->get_to_send());
+ expected_load += msg->get_credit(); // may be 0.0 if !opt::bookkeeping
break;
}
- case message::CREDIT:
- expected_load += msg->get_amount();
- break;
- case message::LOAD: {
+ case message::DATA: {
double ld = msg->get_amount();
- real_load += ld;
- if (finalizing)
- total_load_running -= ld;
+ received_load += ld;
break;
}
case message::CTRL_CLOSE:
