I am trying to compare the CPU and GPU versions of VASP.6.3.0, it seems that the GPU version consumes a lot of time on the STRESS item, does it represent the time for calculation stress tensor?
Here is the time statistic of the GPU version for running an electronic step:
CHARGE: cpu time 1.9418: real time 1.9387 FORLOC: cpu time 0.0368: real time 0.0368 FORNL : cpu time 12.8479: real time 12.8406 STRESS: cpu time 40.6397: real time 40.6181 FORCOR: cpu time 0.0939: real time 0.0936 FORHAR: cpu time 0.0465: real time 0.0465 MIXING: cpu time 0.2403: real time 0.2405 OFIELD: cpu time 0.0000: real time 0.0000
Here is the time statistic of the CPU version:
CHARGE: cpu time 0.3036: real time 0.3050 FORLOC: cpu time 0.0392: real time 0.0393 FORNL : cpu time 1.3977: real time 1.4043 STRESS: cpu time 4.2436: real time 4.2663 FORCOR: cpu time 0.2220: real time 0.2232 FORHAR: cpu time 0.0584: real time 0.0587 MIXING: cpu time 0.0468: real time 0.0469 OFIELD: cpu time 0.0000: real time 0.0000