why I can not use openmp while I use mkl with pgi compilers?

hello anybody:
I try to use the intel mkl in openmp way with pgi compiler.And I use the example that the pgi website post.but I find it does not work because the cpu utilization ratio is just smaller than 100%.There is the website:https://www.pgroup.com/support/link.htm#mkl

ok ,maybe I didn’t set the environment variable.just self-ask self-answer