Distributed-Model.md

@@ -125,10 +125,26 @@ Some traces, with 4 ranks, 1 rank/socket, B = 4, T=1024
 ![mpi_comms.code_legend](uploads/b2a0c1e1c7f98529751cbe14084768aa/mpi_comms.code_legend.png)
 
 
-Communication cost with number of ranks : 
+Communication cost with number of ranks (1rank/socket, B=4*worldsize, T=1024) : 
 | Number of ranks | Communication time from last to first | Communication time from first to last |
 | ------ | ------ | ------ |
  |    2    |   100 ms     | 180 ms |
 |    4    |    70 ms   | 100 ms |
 | 8 | 150 ms | 300 ms |
-| 16 | 175 ms | 300 ms |
\ No newline at end of file
+| 16 | 175 ms | 300 ms |
+
+As you can see, we have a better communication time with 4 ranks. This is because we can adjust the communication block's sizes. Currently, the size have been manually adjusted for 4 ranks, explaining why the best communications time have been set for 4 ranks.
+
+
+# Increasing the number of ranks
+
+With B=16, T=1024, 1 rank/socket
+
+| Number of ranks | time/iteration |
+| ------ | ------ |
+ |    1    |   67000 ms     | 
+|    2    |    31500 ms   | 
+| 4 | 150 ms | 15000 ms |
+
+
+