<div>Hi, Dear CP2K deverlopers</div> I'm trying to optimizing H2O-256.inp in CP2K7.1, Here is the benchmark result:<div><div> **** **** ****** ** PROGRAM STARTED AT 2021-11-03 10:05:57.720</div><div> ***** ** *** *** ** PROGRAM STARTED ON hpc42</div><div> ** **** ****** PROGRAM STARTED BY root</div><div> ***** ** ** ** ** PROGRAM PROCESS ID 877565</div></div><div><br></div><div><div> **** **** ****** ** PROGRAM ENDED AT 2021-11-03 10:14:13.855</div><div> ***** ** *** *** ** PROGRAM RAN ON hpc42</div><div> ** **** ****** PROGRAM RAN BY root</div><div> ***** ** ** ** ** PROGRAM PROCESS ID 877565</div></div><div><br></div><div>The whole process takes exactly 9 mins in my 64 core ARM64+NVIDIA A100 machine, The bench command is as following:</div><div>mpirun --allow-run-as-root -np 64 -x OMP_NUM_THREADS=1 cp2k.psmp benchmarks/QS/H2O-256.inp > cp2k.H2O-256.inp.log<br></div><div><br></div><div>When I switch to the newest CP2K8.2, The benchmark result shows that 38% slower compared to the previous result. It takes 13.6 mins!</div><div><div>[root hpc42 cp2k-8.2]# time -p mpirun --allow-run-as-root -np 64 -x OMP_NUM_THREADS=1 cp2k.psmp benchmarks/QS/H2O-256.inp > cp2k.H2O-256.inp.log</div><div>real 819.39</div><div>user 45364.02</div><div>sys 2102.99</div></div><div><br></div><div>Can anyone tell me what was going on and how to acclerate H2O-256.inp?</div><div><br></div><div>PS: CP2K7.1 uses elpa2019(GPU enabled) and CP2K8.2 didn't use elpa because of an compile error.</div>
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