Re: [petsc-users] A number of questions about DMDA with SNES and Quasi-Newton methods

2017-10-12 Thread zakaryah .
Thanks for the response, Matt - these are excellent questions. On theoretical grounds, I am certain that the solution to the continuous PDE exists. Without any serious treatment, I think this means the discretized system should have a solution up to discretization error, but perhaps this is

Re: [petsc-users] MatSetValues with openMP and no data races

2017-10-12 Thread Lawrence Mitchell
On 12/10/17 14:40, Guillaume Emond wrote: > Goodmorning, > > I would like to clarify a point about the insertion of values with > MatSetValues in a openMP loop. I know these routines are not thread > safe. But, in our situation, we used a graph coloring algorithm on our > mesh to make

Re: [petsc-users] MatSetValues with openMP and no data races

2017-10-12 Thread Mark Adams
Coloring works for OMP assembly. On Thu, Oct 12, 2017 at 9:40 AM, Guillaume Emond wrote: > Goodmorning, > > I would like to clarify a point about the insertion of values with > MatSetValues in a openMP loop. I know these routines are not thread safe. > But, in our

[petsc-users] MatSetValues with openMP and no data races

2017-10-12 Thread Guillaume Emond
Goodmorning, I would like to clarify a point about the insertion of values with MatSetValues in a openMP loop. I know these routines are not thread safe. But, in our situation, we used a graph coloring algorithm on our mesh to make sure no adjacent element is inserted at the same time so

Re: [petsc-users] Trouble installing petsc4py in Anaconda environment

2017-10-12 Thread William T. Jones
On 10/12/17 3:43 AM, Lisandro Dalcin wrote: Please install the maint branch (see issue https://bitbucket.org/petsc/petsc4py/issues/75/) $ conda install cython # required to build the C wrapper source code $ pip install --no-dependencies https://bitbucket.org/petsc/petsc4py/get/maint.tar.gz

[petsc-users] PETSc user meeting 2018, June 4-6, London

2017-10-12 Thread Lawrence Mitchell
Dear PETSc-ites, we would like to invite you to join us at the 2018 PETSc user meeting, to be held at Imperial College London on June 4-6 2018. The meeting webpage: https://www.mcs.anl.gov/petsc/meetings/2018/ The first day consists of tutorials on various aspects and features of PETSc. The

Re: [petsc-users] Trouble installing petsc4py in Anaconda environment

2017-10-12 Thread Lisandro Dalcin
Please install the maint branch (see issue https://bitbucket.org/petsc/petsc4py/issues/75/) $ conda install cython # required to build the C wrapper source code $ pip install --no-dependencies https://bitbucket.org/petsc/petsc4py/get/maint.tar.gz On 12 October 2017 at 00:29, William T Jones