Task #2699: Test POWER9
check performance on POWER9
We recently added compiler flags suitable for POWER9 but discussion at https://gerrit.gromacs.org/#/c/8717/ raised questions of what might be best for performance. When someone has time, this would be good to investigate, and to document the reasoning for the choices.
If there's not time for anybody before 2019 release, we could consider such tweaks for 2019.1.