CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE  514 3rdparty/include/opencl/1.2/CL/cl.h #define CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE 0x11B3
CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE  638 modules/core/src/ocl.cpp #define CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE 0x11B3