No. I do no use hyperthreading. I had checked both OpenMPI and OpenMP - in outup file ... It shows what I set by the launch and enviromental variable correctly. If I use more than 4 cores in any way, I get no speed up ... ________________________________ From: users <[email protected]> on behalf of Pietro Delugas <[email protected]> Sent: Monday, November 16, 2020 3:42:59 PM To: Quantum ESPRESSO users Forum Subject: Re: [QE-users] Sub optimal performance on 32 core AMD machine
Hi Are you using hyperthreading ? If yes, you should try to use only 32 cores. Check the total number of processors at the beginning of the run. The program makes an intense usage of the cpus so that hyperthreading is usually inefficient. Pietro Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 From: Michal Husak<mailto:[email protected]> Sent: Monday, November 16, 2020 3:19 PM To: Quantum ESPRESSO users Forum<mailto:[email protected]> Subject: [QE-users] Sub optimal performance on 32 core AMD machine I _______________________________________________ Quantum ESPRESSO is supported by MaX (www.max-centre.eu) users mailing list [email protected] https://lists.quantum-espresso.org/mailman/listinfo/users
