From: bdemsky <bdemsky>
Date: Tue, 10 Mar 2009 19:48:56 +0000 (+0000)
Subject: changes to prefetch...hope it makes a difference...
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b0d7bca57c8a4ccea361d16b196240395af8f315;p=IRC.git

changes to prefetch...hope it makes a difference...
---

diff --git a/Robust/src/Benchmarks/Prefetch/ManualPrefetch/MatrixMultiply/MatrixMultiplyN.java b/Robust/src/Benchmarks/Prefetch/ManualPrefetch/MatrixMultiply/MatrixMultiplyN.java
index ae2ae5d1..5b2d22cb 100644
--- a/Robust/src/Benchmarks/Prefetch/ManualPrefetch/MatrixMultiply/MatrixMultiplyN.java
+++ b/Robust/src/Benchmarks/Prefetch/ManualPrefetch/MatrixMultiply/MatrixMultiplyN.java
@@ -11,41 +11,51 @@ public class MatrixMultiply extends Thread{
     
     public void run() {
 	atomic {
-        // Prefetch mmul.a[][] matrix
-        Object o = mmul;
         short[] offsets = new short[4];
+        // Prefetch mmul.btranspose[][] matrix
+	//Get all of B first...we need them first
+        offsets[0] = getoffset{MMul, btranspose};
+        offsets[1] = (short) 0;
+        offsets[2] = (short) y0;
+        offsets[3] = (short) (y1 - y0 -1);
+        System.rangePrefetch(mmul, offsets);
+
+	//Get first part of A
         offsets[0] = getoffset{MMul, a};
         offsets[1] = (short) 0;
         offsets[2] = (short) x0;
-        offsets[3] = (short) (x1 - x0 -1);
-        System.rangePrefetch(o, offsets);
-
-        // Prefetch mmul.btranspose[][] matrix
-        Object o1 = mmul;
-        short[] offsets1 = new short[4];
-        offsets1[0] = getoffset{MMul, btranspose};
-        offsets1[1] = (short) 0;
-        offsets1[2] = (short) x0;
-        offsets1[3] = (short) (x1 - x0 -1);
-        System.rangePrefetch(o1, offsets1);
+        offsets[3] = (short) 63;
+        System.rangePrefetch(mmul, offsets);
 
-        // Prefetch mmul.c[][] matrix
-        Object o2 = mmul;
-        short[] offsets2 = new short[4];
-        offsets2[0] = getoffset{MMul, c};
-        offsets2[1] = (short) 0;
-        offsets2[2] = (short) x0;
-        offsets2[3] = (short) (x1 - x0 -1);
-        System.rangePrefetch(o2, offsets2);
+        //Get first part of C
+        offsets[0] = getoffset{MMul, c};
+        offsets[1] = (short) 0;
+        System.rangePrefetch(mmul, offsets);
 
 	    double la[][]=mmul.a;
 	    double lc[][]=mmul.c;
 	    double lb[][]=mmul.btranspose;
 	    int M=mmul.M;
+	    int l=0;
         //Use btranspose for cache performance
-	    for(int i = x0; i< x1; i++){
+	    for(int i = x0; i< x1; i++,l++){
 		double a[]=la[i];
 		double c[]=lc[i];
+		if (((l+32)&63)==0) {
+		    offsets[0] = getoffset{MMul, a};
+		    offsets[1] = (short) 0;
+		    offsets[2] = (short) x0+l;
+		    if ((x0+l+64)>x1)
+			offsets[3]=x1-x0-l-1;
+		    else
+			offsets[3] = (short) 63;
+		    System.rangePrefetch(mmul, offsets);
+
+		    //Get first part of C
+		    offsets[0] = getoffset{MMul, c};
+		    offsets[1] = (short) 0;
+		    System.rangePrefetch(mmul, offsets);
+		}
 		for (int j = y0; j < y1; j++) {
 		    double innerProduct=0;
 		    double b[] = lb[j];