syntax and add limitation to multi-gpu

HySoP/hysop/gpu/config_k20m.py

@@ -194,17 +194,14 @@ kernels_config[3][DOUBLE_GPU]['advec_MS_comm'] = \
     (['common.cl', "remeshing/weights_noVec_builtin.cl",
       'kernels/comm_MS_advection_noVec.cl'],
      False, 1, advection_index_space_3d)
-
 kernels_config[3][DOUBLE_GPU]['remesh_comm'] = \
     (['common.cl', 'remeshing/weights_noVec.cl',
       'kernels/comm_remeshing_noVec.cl'],
      False, 1, remeshing_index_space_3d)
-
 kernels_config[3][DOUBLE_GPU]['advec_and_remesh_comm'] = \
     (['common.cl', 'remeshing/weights_noVec.cl',
       'kernels/comm_advection_and_remeshing_noVec.cl'],
      False, 1, advection_and_remeshing_index_space)
-
 kernels_config[3][DOUBLE_GPU]['advec_MS_and_remesh_comm'] = \
     (['common.cl', 'remeshing/weights_noVec.cl',
       'kernels/comm_advection_MS_and_remeshing_noVec.cl'],

HySoP/hysop/gpu/gpu_particle_advection.py

@@ -84,7 +84,7 @@ class GPUParticleAdvection(ParticleAdvection, GPUOperator):
         if MultiScale in self.method:
             if self.method[MultiScale] is not None:
                 self._isMultiScale = True
-        
+
         if self._isMultiScale:
             self._synchronize = True
 

HySoP/hysop/gpu/multi_gpu_particle_advection.py

@@ -47,13 +47,14 @@ class MultiGPUParticleAdvection(GPUParticleAdvection):
 
         super(MultiGPUParticleAdvection, self).__init__(**kwds)
 
-        msg = "max_dt and _max_velocity must be given to advection "
-        msg += "for computing communication buffer sizes."
-        assert max_dt is not None and max_velocity is not None
-
         msg = "The Multi-GPU works only with the RK2 TimeIntegrator"
         assert self.method[TimeIntegrator] == RK2, msg
         assert self._comm_size > 1, 'Parallel only'
+        assert self.dim == 3, 'A 2D multi-GPU version is not yet available'
+
+        msg = "max_dt and _max_velocity must be given to advection "
+        msg += "for computing communication buffer sizes."
+        assert max_dt is not None and max_velocity is not None
 
         assert self.fields_topo.cutdir[self.direction]
         assert self.fields_topo.shape[self.direction] > 1