POCL_WORK_GROUP_METHOD=cbs python3 test.py make it works
$ POCL_WORK_GROUP_METHOD=cbs python3 test.py [SubCFG] Form SubCFGs in bsort_all [SubCFG] Form SubCFGs in bsort_horizontal [SubCFG] Form SubCFGs in bsort_vertical [SubCFG] Form SubCFGs in bsort_book [SubCFG] Form SubCFGs in bsort_file [SubCFG] Form SubCFGs in medfilt2d [SubCFG] Form SubCFGs in medfilt2d
