<div dir="ltr">There is an environment variable USEGPU that may (or may not) do what you want:<div>$ export USEGPU=no</div><div>or</div><div><div>$ setenv USEGPU no</div><div><br></div>Paolo</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Nov 28, 2021 at 3:10 PM Anson Thomas <<a href="mailto:thomasanson53@gmail.com">thomasanson53@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"><div dir="ltr"><div dir="ltr">Dear QE experts,<div><br><div>I have installed QE 6.8 with GPU acceleration (Ubuntu 18.04.5 LTS (GNU/Linux 4.15.0-135-generic x86_64, Processor: Intel Xeon Gold 5120 CPU 2.20 GHz (2 Processor) RAM: 96 GB Graphics Card: NVIDIA Quadro P5000 (16 GB)). </div><div>For some pw.x calculations, however, I desire to not use the GPU acceleration. Is there a way (some command-line option, or adding lines to bashrc or some other way) to not use GPU acceleration for a particular calculation without recompiling QE? </div><div><br></div><div>--<br></div><div><div dir="ltr"><div dir="ltr"><b>Anson Thomas</b><div>M.Sc. Chemistry, IIT Roorkee</div><div><br></div></div></div></div></div></div></div>
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