Nested parallelization may occur if you use a threaded Intel IPP function on a multithreaded application. Nested parallelization may cause performance degradation.
For applications that use OpenMP threading, nested threading is disabled by default, so this is not an issue.
However, if your application uses threading created by a tool other than OpenMP, you must disable multithreading in the threaded Intel IPP function to avoid this issue.
To disable multithreading, call function ippSetNumThreads with parameter 1, or link your application with IPP unthreaded static libraries.
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Optimization Notice |
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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 |
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