benchmark unaligned memory access

[YC Huang]

Hi,
I'm trying to benchmark what's the cost between aligned/unaligned memory access,but my test-case doesn't show there's obvious performance difference when running on my laptop(Pentium 6200). Am I doing something wrong in the Test? Thank you...
BR,YC Huang
following is the test code:
@State(Scope.Thread)public class MemoryAccessTest {	private long alignedAddr, unalignedAddr;
	@Param({ "24" })	public int structSize;
	public static Unsafe unsafe;	static {		try {			Field field = Unsafe.class.getDeclaredField("theUnsafe");			field.setAccessible(true);			unsafe = (Unsafe) field.get(null);		} catch (Exception e) {		}	}
	@Setup	public void init() {		alignedAddr = unsafe.allocateMemory(structSize);		assert alignedAddr % 8 == 0;
		unalignedAddr = alignedAddr + 9;//	}
	@Benchmark	public long alignedMemAccess() {		return unsafe.getLong(alignedAddr);	}
	@Benchmark	public long unalignedMemAccess() {		return unsafe.getLong(unalignedAddr);	}}