Thanks, Matt, Sorry, I still have more questions on this example. How to refine mesh to make the problem larger?
I tried the following options, and none of them worked. I might do something wrong. -ex56_dm_refine 9 and -dm_refine 4 Thanks, Fande On Mon, Dec 6, 2021 at 5:04 PM Matthew Knepley <[email protected]> wrote: > On Mon, Dec 6, 2021 at 7:02 PM Fande Kong <[email protected]> wrote: > >> Thanks, Matt >> >> On Mon, Dec 6, 2021 at 4:47 PM Matthew Knepley <[email protected]> wrote: >> >>> On Mon, Dec 6, 2021 at 6:40 PM Fande Kong <[email protected]> wrote: >>> >>>> Dear PETSc team, >>>> >>>> I am interested in a careful evaluation of PETSc GPU performance in our >>>> INL cluster. >>>> >>>> Any example in PETSc that can show GPU speedup with solving a nonlinear >>>> equation? >>>> >>>> I talked to Junchao; he suggested that I try SNES/tutorial/ex56. I >>>> tried that, but I could not find any speedup using the GPU. I could attach >>>> some results of "log_view" later if we would like to see that. >>>> >>> >>> We should note that you will only see speedup in the solver, so that >>> problem has to be pretty large. I believe Mark has good results with it. >>> The assembly is still all on the CPU. I am working on this over break, >>> and hope to have a CEED version of it by the new year. >>> >> >> Are both function and matrix assmelies on CPU? Or just the matrix >> assembly? >> > > There is no GPU assembly right now. > > Matt > > >> OK, I will try to check the solver part >> >> Thanks, again >> >> Fande >> >> >> >>> >>> Thanks, >>> >>> Matt >>> >>> >>>> Appreciate any instructions/comments about running a simple PETSc GPU >>>> example to get a speedup. >>>> >>>> Thanks, >>>> >>>> Fande >>>> >>> >>> >>> -- >>> What most experimenters take for granted before they begin their >>> experiments is infinitely more interesting than any results to which their >>> experiments lead. >>> -- Norbert Wiener >>> >>> https://www.cse.buffalo.edu/~knepley/ >>> <http://www.cse.buffalo.edu/~knepley/> >>> >> > > -- > What most experimenters take for granted before they begin their > experiments is infinitely more interesting than any results to which their > experiments lead. > -- Norbert Wiener > > https://www.cse.buffalo.edu/~knepley/ > <http://www.cse.buffalo.edu/~knepley/> >
