<div>Hello,</div><div>I'd suggest the problem is likely <br></div><div> STRESS_TENSOR NUMERICAL</div><div>this is a finite difference approximation to the stress tensor and is massively expensive. Use ANALYTICAL if possible. <br></div><div><br></div><div>SCAN might need a very high cutoff for sensible stress tensor calcs too.<br></div><div>Matt<br></div><br><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Thursday, 4 November 2021 at 12:24:42 UTC martin....@gmail.com wrote:<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div>Hello all,</div><div><br></div><div>I am continuing some work a masters student previously did on a layered MOF material. Calculations run smoothly with PBE-D3 for cell optimisations and NVT MD, but hang (until walltime runs out, without erroring out) after a small number of steps for NPT. Running TRACE TRUE on these jobs consistently shows the last line as an mpi communication (17 905 mp_alltoall_z11v start Hostmem: 818 MB GPUmem: 0 MB)</div><div><br></div><div>I have tested the same calculation on different HPCs and versions of cp2k (5.1 through to 8.1, albeit all using central installs of mpi) and run into the same issue; is this just an mpi issue or is there anything i can try on CP2K's end?</div><div><br></div><div>Interestingly, trying cell optimisations using SCAN (CP2K 8.2) also leads to hanging (same endpoint for TRACE) after the first SCF cycle runs to completion. I have attached inputs for the pbe-d3 NPT run and SCAN geo-opt.</div><div><br></div><div>Best regards,</div><div>Martin<br></div></blockquote></div>
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