-#include "process.h"
-
#include <algorithm>
#include <tr1/functional>
#include <iterator>
#include <sstream>
#include <xbt/log.h>
#include <xbt/time.h>
+
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc);
+
#include "misc.h"
#include "options.h"
-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[])
{
- 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));
+ }
+ 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();
if (neigh.size() == 1) {
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;
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());
- print_loads(logp);
+ print_loads(false, logp);
}
process::~process()
{
+ total_load_exit += load;
}
int process::run()
{
- bool one_more = true;
-
INFO1("Initial load: %g", load);
VERB0("Starting...");
- // first send to inform neighbors about our load
- send();
iter = 0;
- while (one_more) {
- ++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);
- }
+ load -= load_balance(load);
- compute();
+ print_loads(true, xbt_log_priority_debug);
- bool close_received = !receive(false);
+ send();
+ compute();
- if (opt::bookkeeping)
- expected_load -= load_balance(expected_load);
- else
- load -= load_balance(load);
+ if (opt::maxiter && iter >= opt::maxiter)
+ break;
+ } else {
+ // send load information, and load when bookkeeping
+ send();
+ }
- send();
+ // 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);
+ // one of our neighbor is finalizing
if (opt::exit_on_close && close_received)
- one_more = false;
- if (opt::maxiter && iter >= opt::maxiter)
- one_more = false;
+ break;
+
+ // have no load and cannot receive anything
+ if (load == 0.0 && !may_receive)
+ break;
+
+ // 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;
+ }
+
}
VERB0("Going to finalize...");
finalize();
*/
VERB0("Done.");
+ INFO3("Final load after %d iteration%s: %g", iter, ESSE(iter), load);
if (opt::bookkeeping)
- INFO4("Final load after %d iteration%s: %g ; expected: %g",
- iter, ESSE(iter), load, expected_load);
- else
- INFO3("Final load after %d iteration%s: %g", iter, ESSE(iter), load);
+ INFO1("Expected load: %g", expected_load);
return 0;
}
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) {
+ if (load > 0.0) {
+ double duration = opt::comp_cost(load);
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();
+ DEBUG0("nothing to compute !");
}
}
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;
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)
+void process::receive(recv_wait_mode wait)
{
- bool result = true;
+ // DEBUG1("go for receive(%s)",
+ // "NO_WAIT\0WAIT\0\0\0\0WAIT_FOR_CLOSE" + 8 * wait);
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_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];
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;
+ 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()
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(),
DEBUG2("wait for CLOSE from %d neighbor%s.",
(int )neigh.size(), ESSE(neigh.size()));
- receive(true);
+ receive(WAIT_FOR_CLOSE);
comm.flush(true);
}
-void process::print_loads(e_xbt_log_priority_t logp)
+#define print_loads_generic(vec, verbose, logp, cat) \
+ if (_XBT_LOG_ISENABLEDV((*cat), logp)) { \
+ using namespace std::tr1; \
+ using namespace std::tr1::placeholders; \
+ XCLOG0(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
{
- if (!LOG_ISENABLED(logp))
- return;
-
- std::ostringstream oss;
- if (neigh.empty()) {
- oss << "no neighbor!";
- } else {
- std::transform(neigh.begin(), neigh.end() - 1,
- std::ostream_iterator<double>(oss, ", "),
- std::tr1::mem_fn(&neighbor::get_load));
- oss << neigh.back().get_load();
- }
- LOG1(logp, "Neighbor loads: %s", oss.str().c_str());
+ print_loads_generic(neigh, verbose, logp, cat);
}
-void process::insert_neighbor_in_map(neighbor& nb)
+void process::print_loads_p(bool verbose,
+ e_xbt_log_priority_t logp,
+ xbt_log_category_t cat) const
{
- neighbor* nbp = &nb;
- m_host_t host = MSG_get_host_by_name(nb.get_name());
- rev_neigh.insert(std::make_pair(host, nbp));
+ print_loads_generic(pneigh, verbose, logp, cat);
}
+#undef print_loads_generic
+
// Local variables:
// mode: c++
// End:
