User Guide


Inactive Sync Wait Time

Metric Description

Inactive Sync Wait Time is the time when a thread remains inactive and excluded from execution by the OS scheduler due to synchronization. Significant Inactive Sync Wait Time on the critical path of an application execution, combined with a poor CPU Utilization, negatively impacts application parallelism. Explore wait stacks to identify contended synchronization objects and apply optimization techniques to reduce the contention.

Possible Issues

Avarage wait time per synchronization context switch is low that can signal high contended synchronization between threads or inefficient use of system API

Product and Performance Information


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