Intel® Math Kernel Library 2018 Update 1 Developer Guide

Usage Modes of Intel Distribution for LINPACK Benchmark for Intel® Xeon Phi™ Coprocessors and Processors

The Intel Distribution for LINPACK Benchmark supports the second-generation Intel® Xeon Phi™ coprocessor in offload mode, where the MPI processes are run on the host Intel® Xeon® processor. The second-generation Intel Xeon Phi processor is also supported in native mode, where the MPI processes are run directly on the Intel Xeon Phi processor. The offload mode combines use of different parallelization methods and offloading computations to coprocessors. This mode can be advantageous if the host Intel Xeon processor has more memory than the Intel Xeon Phi coprocessor because the MPI processes have access to more memory when run on the host processors than on the coprocessors. To maximize performance, increase the memory on the host processor or processors (64 GB per coprocessor is ideal) and run a large problem using a large block size. Such runs offload pieces of work to the coprocessors. Although this method increases the PCI Express bus traffic, it is worthwhile for solving a problem that is large enough.

Optimization Notice

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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