[QE-users] Parallelizing QE/SternheimerGW Germanium

[grayj6]

Hello,

I have a calculation of Germanium that I would like to run, but I am 
uncertain as to how to parallelize it. I have a kpt_grid of 4, 4, 4 and 
a qpt_grid of 4, 4, 4. The number of bands, num_band is 18. I did the 
scf calculation on a kpoint grid of 8 8 8 0 0 0.

My current submit command is:
mpirun -np 4 /home/grayj6/data/q-e-qe-6.3/SternheimerGW/main/bin/gw.x 
-npool 4 < gw.in >gw.out

... but I do not observe any noticeable speed ups when I add in nbgrp or 
ntask parallelization.

Thank you!