User and Reference Guide

Contents

SYNC-PERIOD

Syntax
SYNC-PERIOD <duration>
Variable
VT_SYNC_PERIOD
Default
-1 seconds
=
disabled
Description
If clock synchronization through message exchanges is enabled (the default), then Intel Trace Collector can be told to do message exchanges during the application run automatically. By default, this is disabled and needs to be enabled by setting this option to a positive time value.
The message exchange is done by a background thread and thus needs a means of communication, which can execute in parallel to the application's communication, therefore it is not supported by the normal MPI tracing library
libVT
.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.