public static int nextHighestPowerOfTwo(int v) {
    v--;
    v |= v >> 1;
    v |= v >> 2;
    v |= v >> 4;
    v |= v >> 8;
    v |= v >> 16;
    v++;
    return v;
  }
returns the next highest power of two, or the current value if it's already a power of two or zero
ambry-utils/src/main/java/com/github/ambry/utils/BitUtil.java