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
)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.