Dear Zeshi Liu

The program test.f90  inside the FFTXLIB makes a test of the permormance of the FFT alone.

If you want use pw you could just take one of the inputs from the test-suite/pw_atom directory, just increase the lattice constant and the cut-off to increase the weight of the FFT.

Pietro


On 19/06/19 05:11, 刘泽世 wrote:

Dear Quantum Espresso's community,


  I'm looking for a QE benchmark (or input problem) where FFT dominantes the execution time. can you give me a hint to find one?


Thanks in advance.


Zeshi Liu

Institute of Computing Technology

Chinese Academy of Sciences



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