Let selectActualNeighbors return right after starting if there are (#2886)

hengjiew · web-flow · commit 48702b48836d · 2022-07-28T11:14:19.000-07:00
no particles for communication.
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)
     {

Original file line number	Diff line number	Diff line change
`@@ -813,6 +813,11 @@ NeighborParticleContainer<NStructReal, NStructInt, NArrayReal, NArrayInt>::`
`813`	`813`	`selectActualNeighbors (CheckPair&& check_pair, int num_cells)`
`814`	`814`	`{`
`815`	`815`	`BL_PROFILE("NeighborParticleContainer::selectActualNeighbors");`
	`816`	`+ const auto& geom_fine = this->Geom(0);`
	`817`	`+ const auto& ba_fine = this->ParticleBoxArray(0);`
	`818`	`+ if (ba_fine.size() == 1 && !geom_fine.isAnyPeriodic()) {`
	`819`	`+ return;`
	`820`	`+ }`
`816`	`821`
`817`	`822`	`for (int lev = 0; lev < this->numLevels(); ++lev)`
`818`	`823`	`{`