How to map xeon phi threads to xeon phi cores in multi-threaded offload call

Hi, 

I have written a code whose skeleton looks like below.

#define CPU_THREADS 4
#define INPUTSIZE 4
#pragma omp parallel num_threads(CPU_THREADS)
{
           #pragma omp for
           for(i =0; i < INPUTSIZE; i++)
              {
                         ..................................
                         ..............some code............... ..
                          ..................................
                          for(j=0; j < 100; j++)
                               {
                                        ......some code.......
                                        #pragma offload target(mic) in(a[0:size] alloc_if(0) free_if(0)) out()
                                         {
                                             #pragma omp parallel num_threads(60)
                                           {
                                              #pragma omp for
                                              for(i=0; i< 240; i++)
                                              {
                                                        .....................some code................
                                                          ..........................................
                                               }
                                           }
                                       }
                               }
                  }
}

So here each CPU THREAD gets 60 MIC threads. I want to set my affinity in such a way that, 1st CPU THREAD  has to use first cores of xeonphi(4 threads per core). 2nd CPU THREAD has to use from 15-30 cores. simlilarly 3rd and 4th CPU THREADS has to use 30-45, 45-60 cores.

Here what i observed is if i set KMP_AFFINITY= compact.  only 15 cores are getting used. I think MIC threads from 0-4 of each CPU THREAD are getting mapped to core 0. Is there any way i can set AFFINITY based on their CPUTHREAD number. 

Please help me on this. Please ask if you need any furthur clarifications.

Also, I noticed that my program is getting hanged at offload call some times(if i use multiple threads its hanging. in single thread mode it is working fine). what could be the reasons for it. Can i suspect the memory allocations that are happening during offload call are the reason?

Thanks

sivaramakrishna