Intel Trace Collector can use either a barrier at the beginning and the end of the program run to take synchronized time stamps on processes or it can use a more advanced algorithm based on statistical analysis of message round-trip times.
This option enables this algorithm by setting the maximum number of seconds that Intel Trace Collector exchanges messages among processes. A value less than or equal to zero disables the statistical algorithm.
The default duration is much longer than actually needed, because usually the maximum number of messages (set through
SYNC-MAX-MESSAGES)is reached first. This setting mostly acts as a safe-guard against excessive synchronization times, at the cost of potentially reducing the quality of clock synchronization when reaching it and then sending less messages.