Re: [petsc-users] Segmentation fault inside PETSc

This is not expected. To eliminate some problem with the MPI I would first select a new PETSC_ARCH value say arch-mpich and do a ./configure --download-mpich if you do not get a problem then the problem is due to OpenMPI if you get a problem it is likely due to PETSc or your code.

[petsc-users] Segmentation fault inside PETSc

Hi, After updating from PETSc 2.7.5 to 2.7.7 (alongside openmpi, but I don't which version was installed, now is 2.1.1), my application started failing insinde KspSetUp() when run with more than 1 process. GDB backtrace: #0 0x7fffca57f798 in mca_pml_ob1_recv_request_progress_rget () from

Re: [petsc-users] Question on assembling matrix in parallel

> On Mar 1, 2018, at 10:56 AM, Edoardo alinovi > wrote: > > Dear Barry, > > thank you very much for the help. I will try to define the matrix as global > and let you know if I have some problems. So just to be sure the following > procedure is allowed: > > -

Re: [petsc-users] Question on assembling matrix in parallel

> On Mar 1, 2018, at 10:24 AM, Edoardo alinovi > wrote: > > Dear All, > > thanks to your suggestions and Petsc, I have finished to program my finite > volume code for CFD that runs in parallel and this is great. > > I am now tryig to improve its performace and I

[petsc-users] Question on assembling matrix in parallel

Dear All, thanks to your suggestions and Petsc, I have finished to program my finite volume code for CFD that runs in parallel and this is great. I am now tryig to improve its performace and I have a question on matrix in MPIAij format. Basically after the discetization, I have one matrix for