#include <algorithm>
#include <tr1/functional>
#include <iterator>
+#include <numeric>
#include <stdexcept>
#include <sstream>
#include <xbt/log.h>
#include "misc.h"
#include "options.h"
-XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simu);
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(proc);
+
+double process::total_load_init = 0.0;
+double process::total_load_exit = 0.0;
process::process(int argc, char* argv[])
{
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(),
- std::tr1::bind(&process::insert_neighbor_in_map,
- this, std::tr1::placeholders::_1));
+ 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;
+ total_load_init += load;
ctrl_close_pending = data_close_pending = neigh.size();
if (neigh.size() == 1) {
print_loads(logp);
}
-int process::run()
+process::~process()
{
- bool one_more = true;
+ total_load_exit += load;
+}
+int process::run()
+{
INFO1("Initial load: %g", load);
VERB0("Starting...");
+ // first send() to inform neighbors about our load (force it)
+ prev_load_broadcast = -1;
iter = 0;
- while (one_more) {
+ bool one_more = true;
+ do {
++iter;
if (opt::log_rate && iter % opt::log_rate == 0) {
INFO2("(%u) current load: %g",
iter, load);
}
-
- compute();
-
- bool close_received = !receive(false);
+ print_loads(xbt_log_priority_debug);
if (opt::bookkeeping)
expected_load -= load_balance(expected_load);
load -= load_balance(load);
send();
- comm.flush(false);
+ compute();
- if (opt::exit_on_close && close_received)
- one_more = false;
- if (opt::maxiter && iter >= opt::maxiter)
- one_more = false;
- }
+// NDS for Need To Send
+#define NDS ((opt::bookkeeping ? expected_load : load) != prev_load_broadcast)
+ bool can_recv;
+ do {
+ // General idea: do not iterate if there is nothing to
+ // compute, nor to send.
+
+ // fixme: review this chunk, and remove this NDS macro!
+
+ bool recv_wait = (load == 0 && !NDS);
+ bool close_received = !receive(recv_wait? WAIT: NO_WAIT);
+
+ if (opt::exit_on_close && close_received)
+ one_more = false;
+ else if (opt::maxiter && iter >= opt::maxiter)
+ one_more = false;
+
+ can_recv = (ctrl_close_pending || data_close_pending);
+
+ } while (one_more && can_recv && load == 0 && !NDS);
+#undef NDS
+
+ } while (one_more);
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;
}
-void process::compute()
+double process::sum_of_to_send() const
{
- // fixme: shall we do something special when duration is 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);
+ using namespace std::tr1;
+ using namespace std::tr1::placeholders;
+
+ return std::accumulate(neigh.begin(), neigh.end(), 0.0,
+ bind(std::plus<double>(),
+ _1, bind(&neighbor::get_to_send, _2)));
}
double process::load_balance(double /*my_load*/)
{
+ if (iter == 1)
+ WARN0("process::load_balance is a no-op!");
return 0.0;
}
+void process::compute()
+{
+ 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 {
+ 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();
void process::send()
{
- // fixme: shall we send data at all iterations?
+ using namespace std::tr1;
+ using namespace std::tr1::placeholders;
+
if (opt::bookkeeping) {
std::for_each(neigh.begin(), neigh.end(),
- std::tr1::bind(&process::send1_bookkeeping,
- this, std::tr1::placeholders::_1));
+ bind(&process::send1_bookkeeping, this, _1));
+ prev_load_broadcast = expected_load;
} else {
std::for_each(neigh.begin(), neigh.end(),
- std::tr1::bind(&process::send1_no_bookkeeping,
- this, std::tr1::placeholders::_1));
+ 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)
{
+ // DEBUG1("go for receive(%s)",
+ // "NO_WAIT\0WAIT\0\0\0\0WAIT_FOR_CLOSE" + 8 * 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;
}
void process::finalize()
{
+ using namespace std::tr1;
+ using namespace std::tr1::placeholders;
+
DEBUG2("send CLOSE to %d neighbor%s.",
(int )neigh.size(), ESSE(neigh.size()));
std::for_each(neigh.begin(), neigh.end(),
- std::tr1::bind(&process::finalize1,
- this, std::tr1::placeholders::_1));
+ bind(&process::finalize1, this, _1));
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:
