Re: [petsc-users] Kokkos Interface for PETSc

Hi Philip, Sorry to be a bit late in my reply. Jed has explained the gist of what's involved with using the Kokkos/Kokkos-kernels back-end for the PETSc solves, though, depending on exactly how Xolotl creates its vectors, there may be a bit of work required to ensure that the command-line

Re: [petsc-users] config error with hypre on Summit

Mark, I asked OLCF if I could get access to Summit so that I could ensure that the latest PETSc builds and works on there and was told "NO". If you are associated with an allocation on there, though, then I could get on and poke around if the PI is willing to approve me on their project. (I

Re: [petsc-users] How to turn off preconditioner in PETSC?

On Wed, Mar 21, 2018 at 6:12 AM, Matthew Knepley wrote: > On Wed, Mar 21, 2018 at 9:07 AM, 我 wrote: > >> Thanks for your reply! You mean the preconditioner must be the necessary >> choice for the linear iterative method in PETSc? >> > > No. As you saw, you

Re: [petsc-users] questions about vectorization

formats? > > > On Nov 14, 2017, at 4:40 PM, Richard Tran Mills <rtmi...@anl.gov> wrote: > > > > On Tue, Nov 14, 2017 at 12:13 PM, Zhang, Hong <hongzh...@anl.gov> wrote: > > > > > >> On Nov 13, 2017, at 10:49 PM, Xiangdong <epsco...@gmail.com&

Re: [petsc-users] questions about vectorization

On Tue, Nov 14, 2017 at 12:13 PM, Zhang, Hong wrote: > > > On Nov 13, 2017, at 10:49 PM, Xiangdong wrote: > > 1) How about the vectorization of BAIJ format? > > > BAIJ kernels are optimized with manual unrolling, but not with AVX > intrinsics. So the

Re: [petsc-users] questions about vectorization

Xiangdong, If you are running on an Intel-based system with support for recent instruction sets like AVX2 or AVX-512, and you have access to the Intel compilers, then telling the compiler to target these instruction sets (e.g., "-xCORE-AVX2" or "-xMIC-AVX512") will probably give you some

Re: [petsc-users] Can not configure PETSc-master with clang-3.9

Fande, Did you remember to agree to the XCode license after your upgrade, if you did an XCode upgrade? You have to do the license agreement again, otherwise the compilers don't work at all. Apologies if this seems like a silly thing to ask, but this has caused me a few minutes of confusion

Re: [petsc-users] Logo?

Maybe it's time to make another attempt. Some years ago the PFLOTRAN developers decided we needed a new logo and Glenn Hammond came up with a simple one that I think looks quite nice (see www.pflotran.org). It just has block lettering and some minimal elements like a water table curve that convey

Re: [petsc-users] PETSC profiling on 1536 cores

Pietro, On Fri, Jun 16, 2017 at 1:29 AM, Pietro Incardona wrote: > [...] > > I will try now other examples more in the direction of having only CG and > no preconditioners to see what happen in scalability and understand what I > am doing wrong. But in the meanwhile I

Re: [petsc-users] Fwd: PETSc installation on Intrepid

=/soft/apps/fen/cmake-2.8.3/bin/cmake', # '--with-hdf5=/soft/apps/hdf5-1.8.0', '--download-parmetis=1', '--download-metis=1', '--download-plapack=1', '--download-hdf5=1' ] I would appreciate any help building the llbrary there. Thanks, Jitu -- Richard Tran Mills, Ph.D

[petsc-users] choosing a preconditioner

is Multigrid... by Wesseling Domain Decomp: Widlund and Tosseli's Title I can't remember is good but most really good PCs come from special solutions, linearizations, frozen terms, recognizing strong vs. weak coupling, etc. Matt -- Richard Tran Mills, Ph.D.| E-mail