Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

  • 2021.1
  • 12/04/2020
  • Public Content
Contents

mkl_set_mpi

Sets the implementation of the message-passing interface to be used by
Intel® oneAPI Math Kernel Library
.

Syntax

int
mkl_set_mpi
(
int
vendor
,
const char *
custom_library_name
);
Include Files
  • mkl.h
Input Parameters
Name
Type
Description
vendor
int
Specifies the implementation of the message-passing interface (MPI) to use:
Possible values:
  • MKL_BLACS_CUSTOM
     - a custom MPI library. Requires a prebuilt custom MPI BLACS library.
  • MKL_BLACS_MSMPI
     - Microsoft MPI library.
  • MKL_BLACS_INTELMPI
     - Intel® MPI library.
  • MKL_BLACS_MPICH
     - MPICH MPI library.
custom_library_namevendor
const char *
The filename (without a directory name) of the custom BLACS dynamic library to use. This library must be located in the directory with your application executable or with
Intel® oneAPI Math Kernel Library
 dynamic libraries. Can be
NULL
 or an empty string.
Description
Call this function to set the MPI implementation to be used by
Intel® oneAPI Math Kernel Library
 on Windows* OS when dynamic
Intel® oneAPI Math Kernel Library
 libraries are used. For all other configurations, the function returns an error indicating that you cannot set the MPI implementation. You can specify your own prebuilt dynamic BLACS library for a custom MPI by setting
vendor
 to
MKL_BLACS_CUSTOM
 and optionally passing the name of the custom BLACS dynamic library. If the
custom_library_path
 parameter is
NULL
or an empty string,
Intel® oneAPI Math Kernel Library
 uses the default platform-specific library name:
mkl_blacs_custom_lp64.dll
 or
mkl_blacs_custom_ilp64.dll
, depending on whether the BLACS interface linked against your application is LP64 or ILP64.
Return Values
Name
Type
Description
status
int
The return status:
  • 0 - The function completed successfully.
  • -1 - The
    vendor
     parameter is invalid.
  • -2 - The
    custom_library_name
     parameter is invalid.
  • -3 - The MPI library cannot be set at this point.
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
This notice covers the following instruction sets: SSE2, SSE4.2, AVX2, AVX-512.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.