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. -- *Gürcan Serttaş* System Engineer E-mail: [email protected] Mobile: +90 541 350 40 72 Phone: +90 212 324 65 70 Address: Nisbetiye Mah. Gümüş Sok Kır Apt. Sitesi B Blok No:5/4 34340 Beşiktaş / İSTANBUL <https://maps.google.com/?q=Nisbetiye%C2%A0%20Mah.%C2%A0%20G%C3%BCm%C3%BC%C5%9F%20Sok%C2%A0%20K%C4%B1r%20Apt.%20Sitesi%20B%20Blok%20No%3A5%2F4%C2%A0%2034340%C2%A0%20Be%C5%9Fikta%C5%9F%20%2F%20%C4%B0STANBUL> Nvidia-GTC <https://www.nvidia.com/en-us/gtc/?ncid=partn-16289>