#include <algorithm>
#include <tr1/functional>
#include <iterator>
+#include <numeric>
#include <stdexcept>
#include <sstream>
#include <xbt/log.h>
namespace {
- void sleep_until_date(double& date, double duration = 0.0)
+ void sleep_until_date(double& date, double duration)
{
double sleep_duration = date - MSG_get_clock();
if (sleep_duration > 0.0)
rev_neigh.insert(std::make_pair(host, ptr));
}
- comp = 0.0;
-
prev_load_broadcast = -1; // force sending of load on first send_all()
expected_load = real_load;
total_load_running += real_load;
comp_iter = lb_iter = 0;
- compute_thread = new_msg_thread("compute",
- std::tr1::bind(&process::compute_loop,
- this));
+ lb_thread = new_msg_thread("loba",
+ std::tr1::bind(&process::load_balance_loop,
+ this));
e_xbt_log_priority_t logp = xbt_log_priority_verbose;
if (!LOG_ISENABLED(logp))
process::~process()
{
- delete compute_thread;
+ delete lb_thread;
total_load_exit += real_load;
if (opt::log_rate < 0)
return;
- if (opt::bookkeeping) {
- XBT_INFO("Final load after %d:%d iterations: %g ; expected: %g",
- lb_iter, comp_iter, real_load, expected_load);
- } else {
- XBT_INFO("Final load after %d:%d iterations: %g",
- lb_iter, comp_iter, real_load);
- }
- XBT_VERB("Total computation for this process: %g", comp);
+ XBT_INFO("Final load after %d:%d iterations: %g",
+ lb_iter, comp_iter, real_load);
+ XBT_VERB("Expected load was: %g", expected_load);
+ XBT_VERB("Total computation for this process: %g", get_comp_amount());
}
int process::run()
{
- if (opt::log_rate >= 0)
+ if (opt::log_rate >= 0) {
XBT_INFO("Initial load: %g", real_load);
+ XBT_VERB("Initial expected load: %g", expected_load);
+ }
XBT_VERB("Starting...");
- compute_thread->start();
- load_balance_loop();
- compute_thread->wait();
+ mutex.acquire();
+ lb_thread->start();
+ while (lb_iter <= opt::comp_iter_delay)
+ cond.wait(mutex);
+ mutex.release();
+ double sleep_duration = opt::comp_time_delay - MSG_get_clock();
+ if (sleep_duration > 0.0)
+ MSG_process_sleep(sleep_duration);
+ compute_loop();
+ lb_thread->wait();
XBT_VERB("Done.");
return 0;
}
double next_iter_after_date = MSG_get_clock() + opt::min_lb_iter_duration;
while (still_running()) {
- ++lb_iter;
+ if (lb_iter == opt::comp_iter_delay) {
+ mutex.acquire();
+ ++lb_iter;
+ cond.signal();
+ mutex.release();
+ } else {
+ ++lb_iter;
+ }
+
+ mutex.acquire();
+ if (!opt::bookkeeping)
+ expected_load = real_load - get_sum_of_to_send();
+ // nothing to do with opt::bookkeeping
if (opt::log_rate && lb_iter % opt::log_rate == 0) {
- if (opt::bookkeeping)
- XBT_INFO("(%u:%u) current load: %g ; expected: %g",
- lb_iter, comp_iter, real_load, expected_load);
- else
- XBT_INFO("(%u:%u) current load: %g",
- lb_iter, comp_iter, real_load);
+ XBT_INFO("(%u:%u) current load: %g", lb_iter, comp_iter, real_load);
+ XBT_VERB("... expected load: %g", expected_load);
}
- if (get_load() > 0.0)
+ if (expected_load > 0.0)
load_balance();
print_loads(true, xbt_log_priority_debug);
// send
+ comm.ctrl_flush(false);
std::for_each(neigh.begin(), neigh.end(),
bind(&process::ctrl_send, this, _1));
+ prev_load_broadcast = expected_load;
+ mutex.release();
sleep_until_date(next_iter_after_date, opt::min_lb_iter_duration);
ctrl_receive(0.0);
-
- comm.ctrl_flush(false);
}
XBT_VERB("Going to finalize for %s...", __func__);
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();
+ // send
comm.data_flush(false);
+ mutex.acquire();
+ std::for_each(neigh.begin(), neigh.end(),
+ bind(&process::data_send, this, _1));
+ mutex.release();
if (real_load == 0.0)
continue;
- // send
- std::for_each(neigh.begin(), neigh.end(),
- bind(&process::data_send, this, _1));
-
// compute
++comp_iter;
double flops = opt::comp_cost(real_load);
TRACE_msg_set_task_category(task, TRACE_CAT_COMP);
XBT_DEBUG("compute %g flop%s", flops, ESSE(flops));
MSG_task_execute(task);
- comp += flops;
+ add_comp_amount(flops);
MSG_task_destroy(task);
sleep_until_date(next_iter_after_date, opt::min_comp_iter_duration);
}
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(),
+ 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(),
if (!last_status) {
/* nop */
+ } else if (opt::exit_request) {
+ XBT_VERB("Global exit requested");
+ last_status = false;
+
} else if (opt::time_limit && MSG_get_clock() >= opt::time_limit) {
XBT_VERB("Reached time limit: %g/%g", MSG_get_clock(), opt::time_limit);
last_status = false;
opt::load_ratio_threshold) {
// fixme: this check should be implemented with a distributed
// algorithm, and not a shared global variable!
- // fixme: should this chunk be moved before call to receive() ?
XBT_VERB("No more load to balance in system.");
last_status = false;
}
return last_status;
}
+double process::get_sum_of_to_send() const
+{
+ using std::tr1::bind;
+ using std::tr1::placeholders::_1;
+ using std::tr1::placeholders::_2;
+
+ return std::accumulate(neigh.begin(), neigh.end(), 0.0,
+ bind(std::plus<double>(),
+ _1, bind(&neighbor::get_to_send, _2)));
+}
+
void process::load_balance()
{
if (lb_iter == 1) // warn only once
void process::send(neighbor& nb, double amount)
{
- set_load(get_load() - amount);
+ expected_load -= amount;
nb.set_to_send(nb.get_to_send() + amount);
nb.set_load(nb.get_load() + amount);
}
-#define print_loads_generic(vec, verbose, logp, cat) \
- if (_XBT_LOG_ISENABLEDV((*cat), logp)) { \
- using std::tr1::bind; \
- using std::tr1::placeholders::_1; \
- XBT_XCLOG(cat, logp, "Neighbor loads:"); \
- std::for_each(vec.begin(), vec.end(), \
- bind(&neighbor::print, _1, verbose, logp, cat)); \
- } else ((void)0)
-
-void process::print_loads(bool verbose,
- e_xbt_log_priority_t logp,
- xbt_log_category_t cat) const
-{
- print_loads_generic(neigh, verbose, logp, cat);
-}
-
-void process::print_loads_p(bool verbose,
- e_xbt_log_priority_t logp,
- xbt_log_category_t cat) const
-{
- print_loads_generic(pneigh, verbose, logp, cat);
-}
-
-#undef print_loads_generic
-
void process::ctrl_send(neighbor& nb)
{
- double info_to_send = get_load();
- if (info_to_send != prev_load_broadcast)
- comm.ctrl_send(nb.get_ctrl_mbox(),
- new message(message::INFO, info_to_send));
+ 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();
if (debt_to_send > 0.0) {
nb.set_to_send(0.0);
nb.set_debt(nb.get_debt() + debt_to_send);
- comm.ctrl_send(nb.get_ctrl_mbox(),
- new message(message::CREDIT, 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);
}
}
}
{
double load_to_send;
if (opt::bookkeeping) {
- if (real_load <= nb.get_debt()) {
- load_to_send = real_load;
+ load_to_send = std::min(real_load, nb.get_debt());
+ if (load_to_send >= opt::min_transfer_amount) {
nb.set_debt(nb.get_debt() - load_to_send);
- real_load = 0.0;
- } else {
- load_to_send = nb.get_debt();
- nb.set_debt(0.0);
real_load -= load_to_send;
+ } else {
+ load_to_send = 0.0;
}
} else {
load_to_send = nb.get_to_send();
- nb.set_to_send(0.0);
+ 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;
+ }
+ }
+ 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);
+ add_data_send_mesg(msg->get_size());
+ comm.data_send(nb.get_data_mbox(), msg);
+ load_to_send -= amount;
}
- if (load_to_send > 0.0)
- comm.data_send(nb.get_data_mbox(),
- new message(message::LOAD, load_to_send));
}
void process::ctrl_close(neighbor& nb)
XBT_DEBUG("%sblocking receive on ctrl (%g)", "\0non-" + !timeout, timeout);
while (ctrl_close_pending && comm.ctrl_recv(msg, from, timeout)) {
+ if (msg->get_type() != message::CTRL_CLOSE)
+ add_ctrl_recv_mesg(msg->get_size());
handle_message(msg, from);
timeout = 0.0;
}
XBT_DEBUG("%sblocking receive on data (%g)", "\0non-" + !timeout, timeout);
while (data_close_pending && comm.data_recv(msg, from, timeout)) {
+ if (msg->get_type() != message::DATA_CLOSE)
+ add_data_recv_mesg(msg->get_size());
handle_message(msg, from);
timeout = 0.0;
}
switch (msg->get_type()) {
case message::INFO: {
neighbor* n = rev_neigh[from];
- n->set_load(msg->get_amount());
+ n->set_load(msg->get_amount() + n->get_to_send());
break;
}
case message::CREDIT:
delete msg;
}
+#define print_loads_generic(vec, verbose, logp, cat) \
+ if (_XBT_LOG_ISENABLEDV((*cat), logp)) { \
+ using std::tr1::bind; \
+ using std::tr1::placeholders::_1; \
+ XBT_XCLOG(cat, logp, "My load: %g (real); %g (expected). " \
+ "Neighbor loads:", real_load, expected_load); \
+ std::for_each(vec.begin(), vec.end(), \
+ bind(&neighbor::print, _1, verbose, logp, cat)); \
+ } else ((void)0)
+
+void process::print_loads(bool verbose,
+ e_xbt_log_priority_t logp,
+ xbt_log_category_t cat) const
+{
+ print_loads_generic(neigh, verbose, logp, cat);
+}
+
+void process::print_loads_p(bool verbose,
+ e_xbt_log_priority_t logp,
+ xbt_log_category_t cat) const
+{
+ print_loads_generic(pneigh, verbose, logp, cat);
+}
+
+#undef print_loads_generic
+
// Local variables:
// mode: c++
// End:
