<br><div>Hello,</div><div><br></div><div>I compiled ELPA with Intel compilers/MKL, and then I compiled CP2K 9.1 including ELPA, also with Intel compilers/MKL. So, everything was compiled with Intel compilers/MKL, and I have CP2K working with either ELPA or Scalapack Intel MKL.<br></div><div><br></div><div>I run a short example of DFTB optimization of a molecular crystal, of which I replicated the unit cell so that the system is ~30000 atoms. I used 576 MPI tasks (12 Intel nodes of 48 cores), in order to compare ELPA and Scalapack Intel MKL.</div><div><br></div><div>I find ELPA slighly slower (~5%) than Scalapack Intel MKL. So, not so good for ELPA whereas I was expecting better. When using ELPA with CP2K, it was with CP2K default settings for ELPA. I may have missed something, and I wonder if there is any best practice for ELPA I'm not aware of.<br></div><div><br></div><div>I'm all ears.</div><div><br></div><div>Thank you,</div><div>Xavier Bidault<br></div>
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