public void endClientRegistration(long start) {
    long ts = DistributionStats.getStatTime();

    // Increment number of notifications
    _stats.incInt(_clientRegistrationsId, 1);

    if (start != 0L && ts != 0L) {
      // Increment notification time
      long elapsed = ts - start;
      _stats.incLong(_clientRegistrationTimeId, elapsed);
    }
  }
Returns the current value of the "eventProcessingTime" stat.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/CacheClientNotifierStats.java