tracker.getTaskTrackerInstrumentation();
if (instrumentation != null) {
MetricsTimeVaryingRate taskLaunchMsecs =
instrumentation.getTaskLaunchMsecs();
if (taskLaunchMsecs != null) {
taskLaunchMsecs.pushMetric(null);
aggTaskLaunchMsecs.inc(
taskLaunchMsecs.getPreviousIntervalAverageTime());
}
}
}