Task-Based-Model.md

@@ -46,8 +46,27 @@ We would like to leverage taskiter to remove the overhead of task creation. Howe
 for (int token=0; token < T; token+=grainsize) {
    #pragma oss task 
    {
-       #pragma oss taskloop
-       for ( /* innerloop */)
+       #pragma oss taskloop collapse(x)
+       for ( /* innerloop(s) */) {
+           /* We can have some other loops here */
+           /* calculations */
+       }
+   }
+}
+```
+
+We will need to move to this kind of structure : 
+```
+for (int token=0; token < T; token+=grainsize) {
+   for ( /* previous inner loops flatten in one loop */) {
+       # pragma oss task 
+       /* calculations */
    }
 }
 ```
+This way, we have transformed the outer loops and all collapsed inner loops into two loops, inside of it we launch a single task. This way we have removed the nested task by implementing the two task by hand.
+
+NB : Currently, you can set the collapsed depth and grainsize in _ompss-2_wrappers.h_, however the grainsize is not as powerful as an ompss grainsize, as it applies only to the innermost flatten loop.
+
+# Performances
+