The traditional MPI/OpenMP* threading model has certain performance issues. Thread safe access to some MPI objects, such as requests or communicators, requires an internal synchronization between threads; the performance of the typical hybrid application, which uses MPI calls from several threads per rank, is often lower than expected.

The PSM2 Multiple Endpoints (Multi-EP) support in the Intel® MPI Library makes it possible to eliminate most of the cross-thread synchronization points in the MPI workflow, at the cost of some limitations on what is allowed by the standard MPI_THREAD_MULTIPLE thread support level. The Multi-EP support, implemented with MPI_THREAD_SPLIT (thread-split) programming model, implies several requirements to the application program code to meet, and introduces a few runtime switches. These requirements, limitations, and usage rules are discussed in the sections below.

Para obtener información más completa sobre las optimizaciones del compilador, consulte nuestro Aviso de optimización.
Seleccione el color del botón adhesivo: 
Orange (only for download buttons)