Re: [petsc-users] Poor speed up for KSP example 45

That's great. Thanks for creating this great piece of software! Amin On Wed, Mar 25, 2020 at 5:56 PM Matthew Knepley wrote: > On Wed, Mar 25, 2020 at 5:41 PM Amin Sadeghi > wrote: > >> Junchao, thank you for doing the experiment, I guess TACC Frontera nodes >> have hi

Re: [petsc-users] Poor speed up for KSP example 45

ate. You are seeing about 50% of perfect speedup at 16 process. I >>> would expect that you will see something similar with streams. Without >>> knowing your machine, your results look typical. >>> >>> On Wed, Mar 25, 2020 at 1:05 PM Amin Sadeghi >>> wro

Re: [petsc-users] Poor speed up for KSP example 45

milar with streams. Without > knowing your machine, your results look typical. > > On Wed, Mar 25, 2020 at 1:05 PM Amin Sadeghi > wrote: > >> Hi, >> >> I ran KSP example 45 on a single node with 32 cores and 125GB memory >> using 1, 16 and 32 MPI processes. Here's

[petsc-users] Poor speed up for KSP example 45

Hi, I ran KSP example 45 on a single node with 32 cores and 125GB memory using 1, 16 and 32 MPI processes. Here's a comparison of the time spent during KSP.solve: - 1 MPI process: ~98 sec, speedup: 1X - 16 MPI processes: ~12 sec, speedup: ~8X - 32 MPI processes: ~11 sec, speedup: ~9X Since the

[petsc-users] PETSc scaling for solving system of equations

Hi, Recently, I've been playing around with petsc4py to solve a battery simulation, which takes too long to solve using scipy solvers. I also have access to an HPC cluster with a few nodes, each with a dozen CPU cores. However, I can't seem to get any further speedup past 4 processors. Very