"Jin, Shuangshuang" <Shuangshuang.Jin at pnnl.gov> writes: > Hello, everyone, I'm trying to run the following example: > http://www.mcs.anl.gov/petsc/petsc-current/src/ksp/ksp/examples/tutorials/ex12.c.html > > It is said that this example solves a linear system in parallel with > KSP. > > However, when I ran it on my clusters, I always got the same copy > running multiple times. I printed the Istart and Iend numbers right > after the MatGetOwnershipRange, and noticed that the index on each > processor are all the same, which is [0, 56].
Your mpiexec does not match the MPI library you compiled with.
