I think N/A (not applicable) would be a better message than NaN. Prior to this mail, even I thought I broke something with these NaN's
On Tue, Apr 26, 2022 at 2:49 PM Matthew Knepley <knep...@gmail.com> wrote: > On Tue, Apr 26, 2022 at 12:03 PM Mark Adams <mfad...@lbl.gov> wrote: > >> Well, Nans are a clear sign that something is very wrong. >> > > Barry chose them so that it could not be mistaken for an actual number. > > Matt > > >> On Tue, Apr 26, 2022 at 11:52 AM Jacob Faibussowitsch < >> jacob....@gmail.com> wrote: >> >>> There is an automatic warning that shows when you do run with >>> `-log_view_gpu_time`, but perhaps there should also be an automatic warning >>> when *not* running with it. It is unfortunate that NaN is the value printed >>> as this implies a bug but AFAIK it is unavoidable (Barry can say more on >>> this though). >>> >>> Best regards, >>> >>> Jacob Faibussowitsch >>> (Jacob Fai - booss - oh - vitch) >>> >>> > On Apr 26, 2022, at 09:48, Jose E. Roman <jro...@dsic.upv.es> wrote: >>> > >>> > You have to add -log_view_gpu_time >>> > See https://gitlab.com/petsc/petsc/-/merge_requests/5056 >>> > >>> > Jose >>> > >>> > >>> >> El 26 abr 2022, a las 16:39, Mark Adams <mfad...@lbl.gov> escribió: >>> >> >>> >> I'm seeing this on Perlmutter with Kokkos-CUDA. Nans in most log >>> timing data except the two 'Solve' lines. >>> >> Just cg/jacobi on snes/ex56. >>> >> >>> >> Any ideas? >>> >> >>> >> VecTDot 2 1.0 nan nan 1.20e+01 1.0 0.0e+00 0.0e+00 >>> 0.0e+00 0 0 0 0 0 0 0 0 0 0 -nan -nan 0 0.00e+00 0 >>> 0.00e+00 100 >>> >> VecNorm 2 1.0 nan nan 1.00e+01 1.0 0.0e+00 0.0e+00 >>> 0.0e+00 0 0 0 0 0 0 0 0 0 0 -nan -nan 0 0.00e+00 0 >>> 0.00e+00 100 >>> >> VecCopy 2 1.0 nan nan 0.00e+00 0.0 0.0e+00 0.0e+00 >>> 0.0e+00 0 0 0 0 0 0 0 0 0 0 -nan -nan 0 0.00e+00 0 >>> 0.00e+00 0 >>> >> VecSet 5 1.0 nan nan 0.00e+00 0.0 0.0e+00 0.0e+00 >>> 0.0e+00 0 0 0 0 0 0 0 0 0 0 -nan -nan 0 0.00e+00 0 >>> 0.00e+00 0 >>> >> VecAXPY 4 1.0 nan nan 2.40e+01 1.0 0.0e+00 0.0e+00 >>> 0.0e+00 0 0 0 0 0 1 0 0 0 0 -nan -nan 0 0.00e+00 0 >>> 0.00e+00 100 >>> >> VecPointwiseMult 1 1.0 nan nan 3.00e+00 1.0 0.0e+00 0.0e+00 >>> 0.0e+00 0 0 0 0 0 0 0 0 0 0 -nan -nan 0 0.00e+00 0 >>> 0.00e+00 100 >>> >> KSPSetUp 1 1.0 nan nan 0.00e+00 0.0 0.0e+00 0.0e+00 >>> 0.0e+00 0 0 0 0 0 0 0 0 0 0 -nan -nan 0 0.00e+00 0 >>> 0.00e+00 0 >>> >> KSPSolve 1 1.0 4.0514e-04 1.0 5.50e+01 1.0 0.0e+00 >>> 0.0e+00 0.0e+00 1 0 0 0 0 2 0 0 0 0 0 -nan 0 >>> 0.00e+00 0 0.00e+00 100 >>> >> SNESSolve 1 1.0 2.2128e-02 1.0 5.55e+05 1.0 0.0e+00 >>> 0.0e+00 0.0e+00 72 56 0 0 0 100100 0 0 0 25 -nan 0 >>> 0.00e+00 0 0.00e+00 0 >>> > >>> >>> > > -- > 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/> >