X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba.git/blobdiff_plain/f21539e9a5f0ab1eb4e3daf9293b01bfd5b317a3..24d1e52d7fe26616e3bee87041acffe889aa4adc:/NOTES

diff --git a/NOTES b/NOTES
index b57d492..71e2729 100644
--- a/NOTES
+++ b/NOTES
@@ -12,11 +12,11 @@ messages, and data for load transfers.
 Process model
 =============
 
-Each process is made of 3 threads: a receiver thread, a computing
-thread, and a load-balancer thread.
+Each process is made of 3 threads: a receiving thread, a computing
+thread, and a load-balancing thread.
 
-* Receiver thread
-  ---------------
+* Receiving thread
+  ----------------
 
     Loop
     | wait for a message to come, either on data channel, or on ctrl channel
@@ -47,10 +47,10 @@ thread, and a load-balancer thread.
   ---------------------
 
     Loop
+    | receive ctrl messages
     | call load-balancing algorithm
     | send ctrl messages
     | sleep (min_lb_iter_duration)
-    | receive ctrl messages
     +-
     send CLOSE on ctrl for all neighbors
     wait for CLOSE on ctrl from all neighbors
@@ -58,10 +58,20 @@ thread, and a load-balancer thread.
   The loop terminates when process::still_running() returns false.
   (read the source for full details...)
 
-Open questions
-==============
- * definition of load on heterogeneous hosts?
- * how to detect convergence?
-   : No need to detect convergence.  Computation stops when there
-     nothing more to do.
- * how to manage link failures?
+Some notes about *load attributes
+=================================
+process::real_load              Current *real* load.
+                                Used for the computations.
+                                Displayed in log messages.
+
+process::expected_load          Current load estimation.
+                                Used for load-balancing estimation, and for
+                                diffusing to neighbors.
+                                * Without bookkeeping, it equals real_load
+                                  minus pending sends.
+                                * With bookkeeping, it corresponds to the
+                                  "virtual load".
+
+process::received_load          Real load received from neighbors.
+                                Used when receiveing data messages, and then
+                                added to real_load.