public synchronized void setPerfLogEnds(Phase phase, Map<String, Long> perfLogEnds) {
    perfLogEndMap.put(phase, perfLogEnds);
  }
@param phase phase of query
@param perfLogEnds map of PerfLogger call-trace name and end time in milliseconds, during given phase.
ql/src/java/org/apache/hadoop/hive/ql/QueryDisplay.java