assertTrue(timingRatio < TIMING_TOLERANCE,
                    String.format(
                            "Timing attack vulnerability detected: timing ratio %.3f exceeds tolerance %.3f "
                                    + "(start: %d ns, middle: %d ns, end: %d ns)",
                            timingRatio, TIMING_TOLERANCE, timeStart, timeMiddle, timeEnd));
        } finally {

    @Override
    public String toString() {
        return String.format(
                "RdmaStatistics[reads=%d, writes=%d, sends=%d, receives=%d, "
                        + "bytes=%d, errors=%d, errorRate=%.3f, activeConnections=%d, activeMemRegions=%d]",
                rdmaReads.get(), rdmaWrites.get(), rdmaSends.get(), rdmaReceives.get(), bytesTransferred.get(), operationErrors.get(),