code: public void outputIntervalHistogram(final EncodableHistogram histogram) {
          outputIntervalHistogram((histogram.getStartTimeStamp() - baseTime)/1000.0,
                  (histogram.getEndTimeStamp() - baseTime)/1000.0,
                  histogram);
      }
docs: Output an interval histogram, using the start/end timestamp indicated in the histogram.
  The histogram start and end timestamps are assumed to be in msec units. Logging will be
  in seconds, realtive by a base time (if set via {@link org.HdrHistogram_voltpatches.HdrHistogram.HistogramLogWriter#setBaseTime}).
  The default base time is 0.
  <p>
  By covention, histogram start/end time are generally stamped with absolute times in msec
  since the epoch. For logging with absolute time stamps, the base time would remain zero. For
  logging with relative time stamps (time since a start point), the base time should be set
  with {@link org.HdrHistogram_voltpatches.HdrHistogram.HistogramLogWriter#setBaseTime}.
  <p>
  The max value in the histogram will be reported scaled down by a default maxValueUnitRatio of
  1,000,000 (which is the msec : nsec ratio). Caller should use the direct form specifying
  maxValueUnitRatio if some other ratio is needed for the max value output.
  @param histogram The interval histogram to log.