User Guide


Thread Oversubscription

Metric Description

Thread Oversubscription indicates time spent in the code with the number of simultaneously working threads more than the number of available logical cores on the system.

Possible Issues

Significant amount of time application spent in thread oversubscription. This can negatively impact parallel performance because of thread preemption and context switch cost.

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