#include <algorithm>
#include <tr1/functional>
#include <iterator>
+#include <numeric>
#include <stdexcept>
#include <sstream>
#include <xbt/log.h>
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_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", comp);
}
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;
+ }
+
+ 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
std::for_each(neigh.begin(), neigh.end(),
bind(&process::ctrl_send, this, _1));
+ prev_load_broadcast = expected_load;
sleep_until_date(next_iter_after_date, opt::min_lb_iter_duration);
ctrl_receive(0.0);
}
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(),
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();
+ double info_to_send = expected_load;
if (info_to_send != prev_load_broadcast)
comm.ctrl_send(nb.get_ctrl_mbox(),
new message(message::INFO, info_to_send));
} else {
load_to_send = nb.get_to_send();
nb.set_to_send(0.0);
+ real_load -= load_to_send;
}
if (load_to_send > 0.0)
comm.data_send(nb.get_data_mbox(),
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:
