Update comments.

diff --git a/src/tests/userprog/matmult.c b/src/tests/userprog/matmult.c
index c30c05b76fd54d00262b0af5508a4fd0ae43b890..4f0615fa06fa642a531309dd0644fe60cccf9d44 100644 (file)
--- a/src/tests/userprog/matmult.c
+++ b/src/tests/userprog/matmult.c
@@ -8,25 +8,29 @@
    and store the result back to the file system!
  */
 
+#include <stdio.h>
 #include <syscall.h>
 
-/* You should define this to be large enough that the arrays
+/* You should define DIM to be large enough that the arrays
    don't fit in physical memory.
 
     Dim       Memory
  ------     --------
      16         3 kB
      64        48 kB
+    128       192 kB
     256       768 kB
+    512     3,072 kB
   1,024    12,288 kB
+  2,048    49,152 kB
   4,096   196,608 kB
+  8,192   786,432 kB
  16,384 3,145,728 kB */
+#define DIM 128
 
-#define Dim 1024
-
-int A[Dim][Dim];
-int B[Dim][Dim];
-int C[Dim][Dim];
+int A[DIM][DIM];
+int B[DIM][DIM];
+int C[DIM][DIM];
 
 int
 main (void)
@@ -34,8 +38,8 @@ main (void)
   int i, j, k;
 
   /* Initialize the matrices. */
-  for (i = 0; i < Dim; i++)
-    for (j = 0; j < Dim; j++)
+  for (i = 0; i < DIM; i++)
+    for (j = 0; j < DIM; j++)
       {
        A[i][j] = i;
        B[i][j] = j;
@@ -43,11 +47,11 @@ main (void)
       }
 
   /* Multiply matrices. */
-  for (i = 0; i < Dim; i++)    
-    for (j = 0; j < Dim; j++)
-      for (k = 0; k < Dim; k++)
+  for (i = 0; i < DIM; i++)    
+    for (j = 0; j < DIM; j++)
+      for (k = 0; k < DIM; k++)
        C[i][j] += A[i][k] * B[k][j];
 
   /* Done. */
-  exit (C[Dim - 1][Dim - 1]);
+  exit (C[DIM - 1][DIM - 1]);
 }