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public static final long TOKENS = 10_000_000_000L;
public static final int ITERATIONS = 150_000;
public static final int POST_BACKOFF_ITERS = 20;
public static final int RESULT_BUFFER_SIZE = 128;
public static final int RESULT_BUFFER_MASK = RESULT_BUFFER_SIZE - 1;
private static long[] results = new long[RESULT_BUFFER_SIZE];

public static void main(String[] args) {
    System.loadLibrary("native");

    long now = measure();
    printResults();

    System.err.println("counter: " + now);
}

private static void printResults() {
    int offset = ITERATIONS + POST_BACKOFF_ITERS - RESULT_BUFFER_SIZE;
    for (int i = 0; i < RESULT_BUFFER_SIZE; i++)
        System.err.printf("Iteration %d: %d ns\n", i + 1 + offset, results[(offset + i) & RESULT_BUFFER_MASK]);
}

private static long measure() {
    Native.setAffinity(7);

    long now = 0;
    for (int i = 0; i < ITERATIONS + POST_BACKOFF_ITERS; i++) {
        backOff(i);
        now = timeInvocation(i);
    }

    return now;
}

private static void backOff(int i) {
    final long backOffMask = -((ITERATIONS - i) >>> 63);
    Blackhole.consumeCPU(1L + (TOKENS & backOffMask));
}

private static long timeInvocation(int i) {
    long now;
    final long start = System.nanoTime();
    now = System.nanoTime();
    final long end = System.nanoTime();
    storeResult(i, end - start);
    return now;
}

private static void storeResult(int i, long l) {
    final int idx = i & RESULT_BUFFER_MASK;
    results[idx] = l;
    System.err.printf("iteration %d: %d\n", i, l);
}

public static final long TOKENS = 1_000_000_000L;
public static final int ITERATIONS = 150_000;
public static final int POST_BACKOFF_ITERS = 30;
public static final int RESULT_BUFFER_SIZE = 128;
public static final int RESULT_BUFFER_MASK = RESULT_BUFFER_SIZE - 1;
private static long[] results = new long[RESULT_BUFFER_SIZE];

public static void main(String[] args) {
    final long l = 0xAAAAAAAAL;
    System.out.println("" + Long.toBinaryString(l));
    System.exit(1);
    System.loadLibrary("native");

    long now = measure();

    System.err.println("counter: " + now);
}

private static void printResults() {
    int offset = ITERATIONS + POST_BACKOFF_ITERS - RESULT_BUFFER_SIZE;
    for (int i = 0; i < RESULT_BUFFER_SIZE; i++)
        System.err.printf("Iteration %d: %d ns\n", i + 1 + offset, results[(offset + i) & RESULT_BUFFER_MASK]);
}

private static long measure() {
    Native.setAffinity(7);
    long now = 0;
    for (int i = 0; i < ITERATIONS + POST_BACKOFF_ITERS; i++) {
        backOff(i);
        now = timeInvocation(i);
    }
    return now;
}

private static void backOff(int i) {
    final long backOffMask = -((ITERATIONS - i) >>> 63);
    Blackhole.consumeCPU(1L + (TOKENS & backOffMask));
}

private static long timeInvocation(int i) {
    long now;
    final long start = System.nanoTime();

private static void storeResult(int i, long l) {

private static void storeResult2(int i, long start, long end) {
    final long l = end - start;

private final long preIters;
private final long tokens;
private long iteration;

public NanoTimeTest(long preIters, long tokens) {
    this.preIters = preIters;
    this.tokens = tokens;
}

public long performWork() {
    return System.nanoTime();
}

public void beforeIteration() {
    final long backOffMask = -((preIters - iteration++) >>> 63);
    Blackhole.consumeCPU(1L + (tokens & backOffMask));
}