Executable launched using micnativeloadex does not seem to detect environment variables

Michael_C_13 — Mon, 18 Jul 2016 23:30:46 GMT

Hello Intel Team,

I wrote a simple "hello world" application to familiarize myself with the Phi. All it does is spit out omp_get_num_threads() inside and outside of an openmp parallel region. I am attempting to control the number and placement of threads as described here: https://software.intel.com/en-us/articles/openmp-thread-affinity-control. For example, I tried

export MIC_ENV_PREFIX=PHI
export PHI_KMP_AFFINITY=scatter,verbose
export PHI_OMP_NUM_THREADS=60 (or 120, 180, etc)

However, when i run my application using

 micnativeloadex ./representative.x

, the usual "verbose" output does not appear, and the calls to omp_get_num_threads() inevitably return either 1 outside of an OpenMP parallel region or 236 within a parallel region.

My assumption is that I have misunderstood something about how to pass environment variables to the coprocessor. Any ideas?

Much appreciated, Michael

Hi Michael,

Loc_N_Intel — Tue, 19 Jul 2016 16:28:13 GMT

Hi Michael,

With micnativeloadex, you can pass the environment variables to the remote application with the switch -e. For example, if you want your remote OMP application running with 32 OMP threads:

$ micnativeloadex  app.mic -e "OMP_NUM_THREADS=32"

where app.mic is the MIC native application. For more information on usage, type "micnativeloadex -h"

That works, thanks!

Michael_C_13 — Tue, 19 Jul 2016 17:56:10 GMT

That works, thanks!

topic Executable launched using micnativeloadex does not seem to detect environment variables in Software Archive

Executable launched using micnativeloadex does not seem to detect environment variables

Hi Michael,

That works, thanks!