From e064f1734652e323c7e8a3f1e266e899ed8c734d Mon Sep 17 00:00:00 2001
From: Peter Boyle <paboyle@ph.ed.ac.uk>
Date: Thu, 19 Oct 2023 18:16:23 -0400
Subject: [PATCH] Faster halo exchange

---
 Grid/algorithms/multigrid/GeneralCoarsenedMatrix.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Grid/algorithms/multigrid/GeneralCoarsenedMatrix.h b/Grid/algorithms/multigrid/GeneralCoarsenedMatrix.h
index 3d051067..2b093923 100644
--- a/Grid/algorithms/multigrid/GeneralCoarsenedMatrix.h
+++ b/Grid/algorithms/multigrid/GeneralCoarsenedMatrix.h
@@ -137,8 +137,7 @@ public:
     CoarseVector tin=in;
 
     texch-=usecond();
-    //    CoarseVector pin  = Cell.Exchange(tin);
-    CoarseVector pin = Cell.ExchangeTest(tin);
+    CoarseVector pin = Cell.ExchangePeriodic(tin);
     texch+=usecond();
 
     CoarseVector pout(pin.Grid());