Let selectActualNeighbors return right after starting if there are (A…

…MReX-Codes#2886) no particles for communication.
Thierry992 · Jul 28, 2022 · 48702b4 · 48702b4
1 parent 6a47d89
commit 48702b4
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/Src/Particle/AMReX_NeighborParticlesI.H b/Src/Particle/AMReX_NeighborParticlesI.H
@@ -813,6 +813,11 @@ NeighborParticleContainer<NStructReal, NStructInt, NArrayReal, NArrayInt>::
 selectActualNeighbors (CheckPair&& check_pair, int num_cells)
 {
     BL_PROFILE("NeighborParticleContainer::selectActualNeighbors");
+    const auto& geom_fine = this->Geom(0);
+    const auto& ba_fine   = this->ParticleBoxArray(0);
+    if (ba_fine.size() == 1 && !geom_fine.isAnyPeriodic()) {
+        return;
+    }
 
     for (int lev = 0; lev < this->numLevels(); ++lev)
     {