• 2019 Update 3
  • 03/07/2019
  • Public Content
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Contents

Syntax:

SYNC-MAX-DURATION <duration>
Variable
VT_SYNC_MAX_DURATION
Default
1 minute
Description
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.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804