Add BUGS and review TODO.

[loba.git] / process.cpp

diff --git a/process.cpp b/process.cpp
index cd1143316289affc356406ed0bb75ee740d9d17c..54573d376232ab2d9a973db2ef8a9c9d2095a1ea 100644 (file)
--- a/process.cpp
+++ b/process.cpp
@@ -20,7 +20,7 @@ double process::total_load_exit = 0.0;
 
 process::process(int argc, char* argv[])
 {
-    if (argc < 2 || !(std::istringstream(argv[1]) >> load))
+    if (argc < 2 || !(std::istringstream(argv[1]) >> real_load))
         throw std::invalid_argument("bad or missing initial load parameter");
 
     neigh.assign(argv + 2, argv + argc);
@@ -36,9 +36,9 @@ process::process(int argc, char* argv[])
     comp = 0.0;
 
     prev_load_broadcast = -1;   // force sending of load on first send_all()
-    expected_load = load;
-    total_load_running += load;
-    total_load_init += load;
+    expected_load = real_load;
+    total_load_running += real_load;
+    total_load_init += real_load;
 
     ctrl_close_pending = data_close_pending = neigh.size();
     close_received = false;
@@ -62,13 +62,13 @@ process::process(int argc, char* argv[])
 
 process::~process()
 {
-    total_load_exit += load;
+    total_load_exit += real_load;
     if (opt::bookkeeping) {
         INFO4("Final load after %d:%d iterations: %g ; expected: %g",
-              lb_iter, comp_iter, load, expected_load);
+              lb_iter, comp_iter, real_load, expected_load);
     } else {
         INFO2("Final load after %d iterations: %g",
-              lb_iter, load);
+              lb_iter, real_load);
         if (lb_iter != comp_iter)
             WARN2("lb_iter (%d) and comp_iter (%d) differ!",
                   lb_iter, comp_iter);
@@ -79,12 +79,11 @@ process::~process()
 int process::run()
 {
     double next_iter_after_date = 0.0;
-    INFO1("Initial load: %g", load);
+    INFO1("Initial load: %g", real_load);
     VERB0("Starting...");
     comp_iter = lb_iter = 0;
     while (true) {
-        double ld = lb_load();
-        if (ld > 0.0) {
+        if (get_load() > 0.0) {
             double now = MSG_get_clock();
             if (now < next_iter_after_date)
                 MSG_process_sleep(next_iter_after_date - now);
@@ -95,21 +94,20 @@ int process::run()
             if (opt::log_rate && lb_iter % opt::log_rate == 0) {
                 if (opt::bookkeeping)
                     INFO4("(%u:%u) current load: %g ; expected: %g",
-                          lb_iter, comp_iter, load, expected_load);
+                          lb_iter, comp_iter, real_load, expected_load);
                 else
                     INFO2("(%u) current load: %g",
-                          lb_iter, load);
+                          lb_iter, real_load);
             }
 
-            ld -= load_balance(ld);
+            load_balance();
 
             print_loads(true, xbt_log_priority_debug);
         }
-        lb_load() = ld;
 
         // send load information, and load (data) if any
         send_all();
-        if (load > 0.0) {
+        if (real_load > 0.0) {
             ++comp_iter;
             compute();
         }
@@ -130,7 +128,7 @@ int process::run()
         // block on receiving unless there is something to compute or
         // to send
         double timeout;
-        if (load != 0 || lb_load() != prev_load_broadcast)
+        if (real_load != 0 || get_load() != prev_load_broadcast)
             timeout = 0.0;
         else if (opt::min_iter_duration)
             timeout = opt::min_iter_duration;
@@ -145,7 +143,7 @@ int process::run()
         }
 
         // have no load and cannot receive anything
-        if (load == 0.0 && !may_receive()) {
+        if (real_load == 0.0 && !may_receive()) {
             VERB0("I'm a poor lonesome process, and I have no load...");
             break;
         }
@@ -174,17 +172,16 @@ int process::run()
     return 0;
 }
 
-double process::load_balance(double /*my_load*/)
+void process::load_balance()
 {
     if (lb_iter == 1)           // warn only once
         WARN0("process::load_balance() is a no-op!");
-    return 0.0;
 }
 
 void process::compute()
 {
-    if (load > 0.0) {
-        double flops = opt::comp_cost(load);
+    if (real_load > 0.0) {
+        double flops = opt::comp_cost(real_load);
         m_task_t task = MSG_task_create("computation", flops, 0.0, NULL);
         TRACE_msg_set_task_category(task, TRACE_CAT_COMP);
         DEBUG2("compute %g flop%s", flops, ESSE(flops));
@@ -196,10 +193,17 @@ void process::compute()
     }
 }
 
+void process::send(neighbor& nb, double amount)
+{
+    set_load(get_load() - amount);
+    nb.set_to_send(nb.get_to_send() + amount);
+    nb.set_load(nb.get_load() + amount); // fixme: make this optional?
+}
+
 void process::send1_no_bookkeeping(neighbor& nb)
 {
-    if (load != prev_load_broadcast)
-        comm.send(nb.get_ctrl_mbox(), new message(message::INFO, load));
+    if (real_load != prev_load_broadcast)
+        comm.send(nb.get_ctrl_mbox(), new message(message::INFO, real_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));
@@ -223,14 +227,14 @@ void process::send1_bookkeeping(neighbor& nb)
     } else {
         new_debt = nb.get_debt();
     }
-    if (load <= new_debt) {
-        load_to_send = load;
+    if (real_load <= new_debt) {
+        load_to_send = real_load;
         nb.set_debt(new_debt - load_to_send);
-        load = 0.0;
+        real_load = 0.0;
     } else {
         load_to_send = new_debt;
         nb.set_debt(0.0);
-        load -= load_to_send;
+        real_load -= load_to_send;
     }
     if (load_to_send > 0.0)
         comm.send(nb.get_data_mbox(), new message(message::LOAD, load_to_send));
@@ -248,7 +252,7 @@ void process::send_all()
     } else {
         std::for_each(neigh.begin(), neigh.end(),
                       bind(&process::send1_no_bookkeeping, this, _1));
-        prev_load_broadcast = load;
+        prev_load_broadcast = real_load;
     }
     comm.flush(false);
 }
@@ -271,7 +275,7 @@ void process::receive(double timeout)
             break;
         case message::LOAD: {
             double ld = msg->get_amount();
-            load += ld;
+            real_load += ld;
             if (finalizing)
                 total_load_running -= ld;
             break;
@@ -303,7 +307,7 @@ void process::finalize()
     using std::tr1::placeholders::_1;
 
     finalizing = true;
-    total_load_running -= load;
+    total_load_running -= real_load;
 
     DEBUG2("send CLOSE to %lu neighbor%s",
            (unsigned long )neigh.size(), ESSE(neigh.size()));