#include <algorithm>
-#include <functional>
+#include <tr1/functional>
#include <iterator>
#include <stdexcept>
#include <sstream>
#include <xbt/log.h>
+#include <xbt/time.h>
#include "misc.h"
+#include "options.h"
#include "process.h"
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simu);
-struct message {
- double measure;
- double transfer;
-};
-
-process::process(int argc, char *argv[])
+process::process(int argc, char* argv[])
{
if (argc < 2 || !(std::istringstream(argv[1]) >> load))
throw std::invalid_argument("bad or missing initial load");
+
neigh.assign(argv + 2, argv + argc);
+ expected_load = 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)
+ comm.listen();
+
e_xbt_log_priority_t logp = xbt_log_priority_verbose;
if (!LOG_ISENABLED(logp))
return;
- LOG1(logp, "My initial load is: %g", load);
std::ostringstream oss;
oss << neigh.size() << " neighbor";
if (!neigh.empty()) {
- oss << (neigh.size() > 1 ? "s: " : ": ");
+ oss << ESSE(neigh.size()) << ": ";
std::transform(neigh.begin(), neigh.end() - 1,
- std::ostream_iterator<std::string>(oss, ", "),
- std::mem_fun_ref(&neighbor::getName));
- oss << neigh.back().getName();
+ std::ostream_iterator<const char*>(oss, ", "),
+ std::tr1::mem_fn(&neighbor::get_name));
+ oss << neigh.back().get_name();
}
LOG1(logp, "Got %s.", oss.str().c_str());
print_loads(logp);
}
+int process::run()
+{
+ bool one_more = true;
+ unsigned iter = 0;
+
+ INFO1("Initial load: %g", load);
+ VERB0("Starting...");
+ while (one_more) {
+ bool close_received;
+ ++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);
+ }
+
+ compute();
+ close_received = !receive(false);
+
+ /*
+ * compute load balancing;
+ * send tasks to neighbors;
+ */
+
+ comm.flush(false);
+
+ if (opt::exit_on_close && close_received)
+ one_more = false;
+ if (opt::maxiter && iter >= opt::maxiter)
+ one_more = false;
+ }
+ VERB0("Going to finalize...");
+ finalize();
+
+ /* Open Questions :
+ * - definition of load on heterogeneous hosts ?
+ * - how to detect convergence ?
+ * - how to manage link failures ?
+ */
+
+ VERB0("Done.");
+ 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);
+ return 0;
+}
+
+void process::compute()
+{
+ // 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);
+}
+
+
+// Returns false if a CLOSE message was received.
+bool process::receive(bool wait_for_close)
+{
+ 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));
+ switch (msg->get_type()) {
+ case message::INFO:
+ // fixme: update neighbor
+ // need a map m_host_t -> neighbor&
+ break;
+ case message::CREDIT:
+ expected_load += msg->get_amount();
+ break;
+ case message::LOAD:
+ load += msg->get_amount();
+ 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;
+ 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;
+ break;
+ }
+ delete msg;
+ }
+ return result;
+}
+
+void process::finalize()
+{
+ DEBUG2("send CLOSE to %d neighbor%s.",
+ (int )neigh.size(), ESSE(neigh.size()));
+ std::vector<neighbor>::iterator n;
+ for (n = neigh.begin() ; n != neigh.end() ; ++n) {
+ comm.send(n->get_ctrl_mbox(), new message(message::CTRL_CLOSE, 0.0));
+ comm.send(n->get_data_mbox(), new message(message::DATA_CLOSE, 0.0));
+ }
+
+ DEBUG2("wait for CLOSE from %d neighbor%s.",
+ (int )neigh.size(), ESSE(neigh.size()));
+ receive(true);
+
+ comm.flush(true);
+}
+
void process::print_loads(e_xbt_log_priority_t logp)
{
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::mem_fun_ref(&neighbor::getLoad));
- oss << neigh.back().getLoad();
+ std::tr1::mem_fn(&neighbor::get_load));
+ oss << neigh.back().get_load();
}
LOG1(logp, "Neighbor loads: %s", oss.str().c_str());
}
-int process::run()
-{
- INFO0("Coucou !");
- MSG_process_sleep(100.0); // xxx
- /* xxx:
- * while (there is something to do) {
- * compute some task;
- * get received tasks;
- * compute load balancing;
- * send tasks to neighbors;
- * }
- */
-
- /* Open Questions :
- * - definition of load on heterogeneous hosts ?
- * - how to detect convergence ?
- * - how to manage link failures ?
- */
-
- // xxx: shall we retrieve pending tasks?
-
- return 0;
-}
-
// Local variables:
// mode: c++
// End:
