X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/f29b38ef2a056daa14bbfda2fce78063faa773d4..5279f43fc9be71815091e79c76d5bc04c8c88421:/process.cpp?ds=sidebyside

diff --git a/process.cpp b/process.cpp
index 8ceb469..d8ec500 100644
--- a/process.cpp
+++ b/process.cpp
@@ -1,24 +1,32 @@
 #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;
@@ -26,56 +34,144 @@ process::process(int argc, char *argv[])
     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;
+    VERB0("Starting...");
+    while (one_more) {
+        bool close_received;
+
+        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);
+        ++iter;
+
+        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.");
+    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: