Re: [petsc-users] Question about time issues in parallel computing

2023-03-15 Thread Mark Adams
Speed up to 4 processors should have at least 40,000 equations for 3D problems and more for 2D. At least for iterative solvers. This is probably a good place to start with direct solvers but you might see benefit with a little less. Mark On Wed, Mar 15, 2023 at 9:09 PM ­권승리 / 학생 / 항공우주공학과

Re: [petsc-users] Question about time issues in parallel computing

2023-03-15 Thread ­권승리 / 학생 / 항공우주공학과
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 님이 작성: > On Wed, Mar 15, 2023 at 3:38 AM ­권승리 / 학생 / 항공우주공학과 > wrote: > >> Dear petsc

Re: [petsc-users] Question about time issues in parallel computing

2023-03-15 Thread Matthew Knepley
On Wed, Mar 15, 2023 at 3:38 AM ­권승리 / 학생 / 항공우주공학과 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

[petsc-users] Question about time issues in parallel computing

2023-03-15 Thread ­권승리 / 학생 / 항공우주공학과
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