[petsc-dev] Petsc-3.7.7-Parallel-Testing

[Satish Balay]

Looks like this issue is also resent to petsc-maint - and is addressed there.

Satish

On Thu, 18 Mar 2021, Gürcan Serttaş wrote:

> Hello Sir/Madam,
> 
> 
> We tried to run the tutorial steps following site.
> 
> *https://www.mcs.anl.gov/petsc/documentation/tutorials/HandsOnExercise.html*
> 
>  * Compile src/ksp/ksp/examples/tutorial/ex11.c
> 
>       cd /petsc-3.7.7/src/ksp/ksp/examples/tutorial/ex11.c
>       make ex11
>   
> 
>  * Run simple advection through a tiny hybrid mesh
>  *
> 
>    We are new to the petsc and  when we ran the ex11 input we got a
>    screen output like one below
> 
>        ~/petsc-3.7.7/openmpi-gnu-O3/bin/mpiexec  -n 1 ./ex11 -f
> ${PETSC_DIR}/share/petsc/datafiles/meshes/sevenside.exo
> 
>       $ Norm of error 0.00133762 iterations 26
> 
>  * When we increase the number of core the result did not change.
> 
> 	$ ~/petsc-3.7.7/openmpi-gnu-O3/bin/mpiexec  -n 4 ./ex11 -f
> 	${PETSC_DIR}/share/petsc/datafiles/meshes/sevenside.exo
> 	$ Norm of error 0.00133762 iterations 26
> 
> *    But the expected value is :*
> 
>   0  time        0  |x|    7.155
>   1  time   0.7211  |x|    4.386
>   2  time    1.442  |x|    1.968
>   3  time    2.163  |x|    1.925
> CONVERGED_TIME at time 2.16333 after 3 steps
> 
> **
> 
> Moreover, we got the similar output in the other examples and did not see any
> running time .
> 
> Could you please help in this issue ?
> 
> Kind Regards.
>