[petsc-dev] About parallel of ILU

[Chen Gang]

Dear Professor,


I have a question about the bjacobi+ilu, I'm in the place  


src/ksp/ksp/tutorials 


and running the ex2 with


mpirun -np 40 -bind-to core ./ex2 -m 2000 -n 2000  -ksp_max_it 1000000 -ksp_rtol 1e-10 -ksp_type gmres -pc_type bjacobi -sub_pc_type ilu  -sub_pc_factor_levels 10 -ksp_monitor_short



on the Intel machine with 40 cores, the petsc is complied with MKL and ICC/MPIICC with O3.


I found the numerical results are not the same from time to time, although they all right, the iterations are not exactly the same from time to time. Where have I done wrong?










I'm looking forward to hear you!


Best,


Gang Chen


Sichuan Univertsity,
School of Mathematics,
Chengdu, China
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