On Mon, Mar 11, 2019 at 6:32 AM Myriam Peyrounette < myriam.peyroune...@idris.fr> wrote:
> Hi, > > good point, I changed the 3.10 version so that it is configured with > --with-debugging=0. You'll find attached the output of the new LogView. The > execution time is reduced (although still not as good as 3.6) but I can't > see any improvement with regard to memory. > > You'll also find attached the grep GAMG on -info outputs for both > versions. There are slight differences in grid dimensions or nnz values, > but is it significant? > No. And the GAMG runs seem to be on a 13x13x13 grid. The nnz goes down a lot here, which is odd, but the problem is so small that we are probably just seeing boundary effects. > Thanks, > > Myriam > > > > Le 03/08/19 à 23:23, Mark Adams a écrit : > > Just seeing this now. It is hard to imagine how bad GAMG could be on a > coarse grid, but you can run with -info and grep on GAMG and send that. You > will see listing of levels, number of equations and number of non-zeros > (nnz). You can send that and I can get some sense of GAMG is going nuts. > > Mark > > On Fri, Mar 8, 2019 at 11:56 AM Jed Brown via petsc-users < > petsc-users@mcs.anl.gov> wrote: > >> It may not address the memory issue, but can you build 3.10 with the >> same options you used for 3.6? It is currently a debugging build: >> >> ########################################################## >> # # >> # WARNING!!! # >> # # >> # This code was compiled with a debugging option. # >> # To get timing results run ./configure # >> # using --with-debugging=no, the performance will # >> # be generally two or three times faster. # >> # # >> ########################################################## >> >> > -- > Myriam Peyrounette > CNRS/IDRIS - HLST > -- > >