Intel opencl Dynamic profiler report

Thanks for the reply, So for my case I am restricting to 8 read and write ports as I am getting better performance from that. But for writing I am not able to achieve high bandwidth , I am getting very poor writing performance with memory bandwidth in few 100's MB/s but for reading I am getting around 12GB/s of bandwidth, is there any optimization technique you can suggest to improve upon my writing bandwidth?

Also for reading although I get that 12GB/s of bandwidth but profiler gives the description of 60% efficient , do you know what that could mean?