<div>Dear all,</div><div><br /></div><div>when running a DCDFT calculation with pre-compiled CP2K binaries from GitHub, I do observe a significant reduction in overall runtime performance when moving from CP2K version 2024.1 to 2024.2 (and versions beyond). </div><div><br /></div><div>The increase occurs in ENERGY_FORCE runs only. The crucial spot seems to be the execution part AFTER convergence of the gradient response solver "The linear solver converged in 7 iterations." <br /></div><div><br /></div><div>From the HFX_MEM_INFO output, it is apparent that version 2024.2 computes a somewhat larger number of "sph. DERIV's calculated on the fly" (see attached outputs for a 20 water PBC cell), but the difference in my opinion is too small to explain the increase in runtime of about 50% for that system size. <br /></div><div><br /></div><div>For larger system with 32 or 64 H2O molecules, the described runtime increase becomes more pronounced, reaching 250% for 64 H2O molecules.</div><div><br /></div><div>Is that expected/intended behavior?<br /></div><div><br /></div><div>Any explanation, hint or advice would be greatly appreciated.</div><div><br /></div><div>Regards,</div><div><br /></div><div>Ralf</div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div> <br /> </div><div><br /></div>
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