From: Arnaud Giersch <arnaud.giersch@iut-bm.univ-fcomte.fr>
Date: Mon, 19 Sep 2011 14:17:05 +0000 (+0200)
Subject: Use credit to try to avoid useless transfers.
X-Git-Tag: exp_20120216~49
X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/commitdiff_plain/b0b2d9cb57d83fcdfb92837561ffb5dbab288323?ds=inline

Use credit to try to avoid useless transfers.
---

diff --git a/process.cpp b/process.cpp
index 27c3a1b..5d0f98b 100644
--- a/process.cpp
+++ b/process.cpp
@@ -323,13 +323,18 @@ void process::data_send(neighbor& nb)
 {
     double load_to_send;
     if (opt::bookkeeping) {     // bookkeeping
-        double excess_load;
+        double excess_load;     // load amount we are able to send
         if (opt::egocentric)
             excess_load = std::max(0.0, real_load - expected_load);
         else
             excess_load = real_load;
-        load_to_send = compute_load_to_send(std::min(excess_load,
-                                                     nb.get_debt()));
+
+        double balance = nb.get_debt() - nb.get_credit();
+        load_to_send = std::min(excess_load,
+                                std::max(0.0, balance));
+
+        // adjust load to send (rounding, truncation, etc.)
+        load_to_send = compute_load_to_send(load_to_send);
         if (load_to_send > 0.0)
             nb.set_debt(nb.get_debt() - load_to_send);
     } else {                    // !bookkeeping