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. >
