Thank you for your reply. It was a simple problem, but it has more than 1000 degrees of freedom.
Is this not enough to check speedup? Best regards Seung Lee Kwon 2023년 3월 15일 (수) 오후 8:50, Matthew Knepley <[email protected]>님이 작성: > On Wed, Mar 15, 2023 at 3:38 AM 권승리 / 학생 / 항공우주공학과 <[email protected]> > wrote: > >> Dear petsc developers. >> >> Hello. >> I am trying to solve the structural problem with FEM and test parallel >> computing works well. >> >> However, even if I change the number of cores, the total time is >> calculated the same. >> >> I have tested on a simple problem using a MUMPS solver using: >> mpiexec -n 1 >> mpiexec -n 2 >> mpiexec -n 4 >> ... >> >> Could you give me some advice if you have experienced this problem? >> > > If your problem is small, you could very well see no speedup: > > > https://petsc.org/main/faq/#what-kind-of-parallel-computers-or-clusters-are-needed-to-use-petsc-or-why-do-i-get-little-speedup > > Thanks, > > Matt > > >> Best regards >> Seung Lee Kwon >> -- >> Seung Lee Kwon, Ph.D.Candidate >> Aerospace Structures and Materials Laboratory >> Department of Mechanical and Aerospace Engineering >> Seoul National University >> Building 300 Rm 503, Gwanak-ro 1, Gwanak-gu, Seoul, South Korea, 08826 >> E-mail : [email protected] >> Office : +82-2-880-7389 >> C. P : +82-10-4695-1062 >> > > > -- > What most experimenters take for granted before they begin their > experiments is infinitely more interesting than any results to which their > experiments lead. > -- Norbert Wiener > > https://www.cse.buffalo.edu/~knepley/ > <http://www.cse.buffalo.edu/~knepley/> > -- Seung Lee Kwon, Ph.D.Candidate Aerospace Structures and Materials Laboratory Department of Mechanical and Aerospace Engineering Seoul National University Building 300 Rm 503, Gwanak-ro 1, Gwanak-gu, Seoul, South Korea, 08826 E-mail : [email protected] Office : +82-2-880-7389 C. P : +82-10-4695-1062
