[petsc-dev] odd log behavior

[Jacob Faibussowitsch]

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 <jroman at 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 <mfadams at 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
>