libiomp5.so (with ompt support) cannot trigger ompt_intialize() in an offload openmp environment

I'm running an Intel MIC offload openmp application using openmp runtime (with ompt support, both the CPU side and the MIC side), while libiomp5.so on the CPU side can trigger its ompt_intialize() and get profile data, libiomp5.so on the MIC side cannot trigger its ompt_intialize(), so that I cannot get the profile data I want. I'm wondering where the problem is.