Developer Guide for Intel® oneAPI Math Kernel Library for Linux*

Developer Guide

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

Using MKL_DIRECT_CALL in Fortran Applications

The following examples of code and link lines show how to activate direct calls to
Intel® oneAPI Math Kernel Library
 kernels in Fortran applications:
  • Include
    mkl_direct_call.fi
    , to be preprocessed by the Fortran compiler preprocessor 
    #     include "mkl_direct_call.fi"
      program   DGEMM_MAIN
....
*      Call Intel MKL DGEMM
....
      call sub1()
      stop 1
      end

*     A subroutine that calls DGEMM 
      subroutine sub1
*      Call Intel MKL DGEMM

      end
  • For multi-threaded
    Intel® oneAPI Math Kernel Library
    , compile with
    -
    fpp
     option for Intel Fortran compiler and with
    MKL_DIRECT_CALL
     preprocessor macro: 
    ifort –DMKL_DIRECT_CALL –fpp your_application.f -Wl,--start-group $(MKLROOT)/lib/intel64/libmkl_intel_lp64.a $(MKLROOT)/lib/intel64/libmkl_core.a $(MKLROOT)/lib/intel64/libmkl_intel_thread.a -Wl,--end-group -lpthread –lm -openmp -I$(MKLROOT)/include
  • To use
    Intel® oneAPI Math Kernel Library
     in the sequential mode, compile with
    -
    fpp
     option for Intel Fortran compiler (or with
    -Mpreprocess
     for PGI compilers) and with
    MKL_DIRECT_CALL_SEQ
     preprocessor macro: 
    ifort –DMKL_DIRECT_CALL_SEQ –fpp your_application.f -Wl,--start-group $(MKLROOT)/lib/intel64/libmkl_intel_lp64.a $(MKLROOT)/lib/intel64/libmkl_core.a $(MKLROOT)/lib/intel64/libmkl_sequential.a -Wl,--end-group -lpthread –lm -I$(MKLROOT)/include
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

Product and Performance Information

1

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