From 97a648020a9dc39ab05016978042df01e889ff6d Mon Sep 17 00:00:00 2001
From: Stefan Lankes <lankes@lfbs.rwth-aachen.de>
Date: Sat, 22 Oct 2011 06:13:16 -0700
Subject: [PATCH] add prefetching for the sequentiel laplace

---
 apps/laplace.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/apps/laplace.c b/apps/laplace.c
index a892d61b..bd672299 100644
--- a/apps/laplace.c
+++ b/apps/laplace.c
@@ -219,6 +219,12 @@ int laplace(void *arg)
 			for (i = 1; i < n + 1; i++) {
 // over all rows
 				for (j = 1; j < m + 1; j++) {
+#if !USE_SVM
+					if (j % CACHE_LINE == 1) {
+						asm volatile ("movl %0, %%eax" :: "r"(&(NewValues[I + i][J + j])) : "%eax");
+					}
+#endif
+
 #if 1
 					NewValues[I + i][J + j] =
 					    (OldValues[I + i - 1][J + j] +
@@ -241,8 +247,8 @@ int laplace(void *arg)
 			NewValues = OldValues;
 			OldValues = tmp;
 
-			//RCCE_TNS_barrier(&RCCE_COMM_WORLD);
-			RCCE_barrier(&RCCE_COMM_WORLD);
+			RCCE_TNS_barrier(&RCCE_COMM_WORLD);
+			//RCCE_barrier(&RCCE_COMM_WORLD);
 
 #ifdef _USE_GFX
 			if ((my_rank == 0) && (t % 50 == 0)) {