Developer Guide

Contents

Setting the Environment Variable for Conditional Numerical Reproducibility

The following examples illustrate the use of the
MKL_CBWR
environment variable. The first command
in each list
sets
Intel® MKL
to run in the CNR mode based on the default dispatching for your platform. The other two commands
in each list
are equivalent and set the CNR branch to Intel AVX
.
For the bash shell:
  • export MKL_CBWR="AUTO"
  • export MKL_CBWR="AVX"
  • export MKL_CBWR="BRANCH=AVX"
For the C shell (csh or tcsh):
  • setenv MKL_CBWR "AUTO"
  • setenv MKL_CBWR "AVX"
  • setenv MKL_CBWR "BRANCH=AVX"

Product and Performance Information

1

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