[Pw_forum] How to speed up gipaw?

[Ren PJ]

Dear all,
I'm using gipaw to calculate NMR of a system contain more than 100
atoms, but the first k point haven't been done after more than 40
hours. It's so slow for me. 
Here is my input:
&inputgipaw
        job = 'nmr'
        prefix = 'pw'
        tmp_dir = './tmp/'
        isolve = 0
        conv_threshold=1e-10
        iverbosity = 1
        q_gipaw = 0.01
        spline_ps = .true.
        use_nmr_macroscopic_shape = .true.
       nmr_macroscopic_shape = 0.5 0.0 0.0 0.0 0.5 0.0 0.0 0.0 0.6667
/
Can anyone figure me out how to improve this?
PS. My computer is 8 core cpu, and gipaw and QE is compiled with intel
mkl lib.
Thanks very much!

Pengju Ren

Dalian Institute of Chemical Physics,
Chinese Academy of Science