Re: [petsc-users] performance regression with GAMG

2023-08-12 Thread Mark Adams
I will add the old method back in. And I did touch the MIS code and graph creation, which turns a bs>1 matrix into a bs==1 matrix/graph. I don't think I changed the semantics but I did not verify that carefully. In thinking more about this error I realize that this test has thin body elements, pr

Re: [petsc-users] Using PETSc GPU backend

2023-08-12 Thread Ng, Cho-Kuen via petsc-users
Thanks Jacob. From: Jacob Faibussowitsch Sent: Saturday, August 12, 2023 5:02 AM To: Ng, Cho-Kuen Cc: Barry Smith ; petsc-users Subject: Re: [petsc-users] Using PETSc GPU backend > Can petsc show the number of GPUs used? -device_view Best regards, Jacob Faibu

Re: [petsc-users] Using PETSc GPU backend

2023-08-12 Thread Jacob Faibussowitsch
> Can petsc show the number of GPUs used? -device_view Best regards, Jacob Faibussowitsch (Jacob Fai - booss - oh - vitch) > On Aug 12, 2023, at 00:53, Ng, Cho-Kuen via petsc-users > wrote: > > Barry, > > I tried again today on Perlmutter and running on multiple GPU nodes worked. > Likely,