add lb inactive tracking

# Conflicts:
#	CHANGELOG.md

Author: Snapex2409

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## latest
 
+- Improved load balancing of inactive simulations by tracking a small amount of time [#272](https://github.com/precice/micro-manager/pull/272)
 - Added the exported field `model_resolution` when using model adaptivity [#271](https://github.com/precice/micro-manager/pull/271)
 - Fixed model adaptivity active simulation mask generation for 0 local simulations [#270](https://github.com/precice/micro-manager/pull/270)
 - Allow `initialize()` to return data that is not used by the adaptivity [#261](https://github.com/precice/micro-manager/pull/261)

micro_manager/micro_manager.py

@@ -1112,11 +1112,17 @@ def _solve_micro_simulations_with_adaptivity(
 
         # Resolve micro sim output data for inactive simulations
         for inactive_lid in inactive_sim_lids:
+            self.load_balancing.pre_sim_solve(
+                self._global_ids_of_local_sims[inactive_lid]
+            )
             micro_sims_output[inactive_lid]["Active-State"] = 0
             gid = self._global_ids_of_local_sims[inactive_lid]
             micro_sims_output[inactive_lid][
                 "Active-Steps"
             ] = self._micro_sims_active_steps[gid]
+            self.load_balancing.post_sim_solve(
+                self._global_ids_of_local_sims[inactive_lid]
+            )
 
         # Collect micro sim output for adaptivity calculation
         for i in range(self._local_number_of_sims):