<div dir="ltr"><div>Hi Mauro,</div><div><br></div><div>it will be easy to look into your scaling issue if you report time for each MD step. I am also doing MD with xTB.<br></div><div><br></div><div>Regards</div><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Manjusha<br></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 22, 2021 at 10:59 AM Mauro Sgroi <<a href="mailto:maurofran...@gmail.com">maurofran...@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear all,<div>I'm testing the xTB code on a liquid electrolyte containing a Li ion.</div><div>I'm running MD on a cell containing 728 atoms.</div><div>I obtain a disappointing scaling with the number of cores. The following are times for 100 MD steps:</div><div><br></div><div><div>cores Time (s)</div><div>28 7818 </div><div>56 7364</div><div>84 6529</div><div>112 7493</div></div><div><br></div><div>My input file can be downloaded here: </div><div><br></div><div><a href="https://drive.google.com/file/d/1KvZz5x6FwgOP3dzH6fePghMQBineIlfE/view?usp=sharing" target="_blank">https://drive.google.com/file/d/1KvZz5x6FwgOP3dzH6fePghMQBineIlfE/view?usp=sharing</a></div><div><br></div><div>Is this the right behaviour to be expected? Or is there is something wrong in my compilation of the code or in the input file? </div><div>The HPC facility has a Infinband network protocol and a fast shared filesystem.</div><div><br></div><div>Thanks a lot in advance and best regards,</div><div>Mauro Sgroi.</div><div><br></div><div><br></div><div><br></div>
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