protected void createWalk(int vsize) {
// We do a random copy order to attempt to get multiple threads
// reading and writing the same cache line
// We could do this as a simple walk but that would likely miss
// some caching issues.
final int tw = gCount / vsize;
int tmp[] = new int[tw];
boolean b[] = new boolean[tw];
int toCopy = tw;
int i = 0;
while (toCopy > 0) {
int x = random.nextInt(tw);
while ((x < tw) && b[x]) {
x++;
if (x >= tw) {
x = 0;
}
}
b[x] = true;
toCopy--;
// android.util.Log.v("rs", "walk " + i + ", " + x);
tmp[i++] = x;
}
walkAlloc = Allocation.createSized(mRS, Element.I32(mRS), tw);
walkAlloc.copy1DRangeFrom(0, tw, tmp);
}
private int[] randomIntArray(int len) {
int t[] = new int[len];
for (int i = 0; i < t.length; i++) {
t[i] = random.nextInt();
}
in1DAlloc.copyFrom(t);
in2DAlloc.copyFrom(t);
in3DAlloc.copyFrom(t);
return t;
}
private short[] randomShortArray(int len) {
short t[] = new short[len];
for (int i = 0; i < t.length; i++) {
t[i] = (short) (random.nextInt() & 0xffff);
}
in1DAlloc.copyFrom(t);
in2DAlloc.copyFrom(t);
in3DAlloc.copyFrom(t);
return t;
}