Hello Hong, I just want to check with you if there is any updates on why the code crashes under -sbaij?
At the meanwhile, unfortunately PETSC-3.5 hasn't been installed on my server due to some technical problems. I hope technicians can get it done as soon as possible. I will update you when I have any new results. Thanks so much. Best regards, Jifeng On Wed, Jul 30, 2014 at 2:53 PM, jifeng zhao < [email protected]> wrote: > Hello Hong, > > Thanks a lot. The result makes sense, but I think I will need higher > accuracy (smaller tolerance). I will take a try myself at the meanwhile. > > Best regards, > Jifeng Zhao > > > On Wed, Jul 30, 2014 at 1:16 PM, [email protected] <[email protected]> > wrote: > >> Jifeng, >> Using petsc-3.5 and slepc-3.5 (maint branch), I tested your matrices >> >> mpiexec -n 32 ./ex7 -f1 $data/zhao/petsc_stiff20.dat -f2 >> $data/zhao/petsc_mass20.dat -mat_view ascii::ascii_info -mat_type aij >> -eps_gen_hermitian -eps_type krylovschur -eps_target -0.1 -st_ksp_type >> minres -st_pc_type bjacobi -st_sub_pc_type icc -st_ksp_rtol 1.e-2 >> -eps_tol 1.e-2 -eps_nev 40 -st_type sinvert -log_summary |& tee >> log.mat20.ex7.np32.tol-2 >> >> The output is attached. >> >> When using '-mat_type sbaij', I got same error as reported, which >> might be a bug in our libraries. I'll investigate it. >> Switching to '-mat_type aij' works (I'm not sure if the computed >> eigenvalues are meaningful though), but the linear solver >> minres/bjacobi/icc converges very slow, takes around 500 - 1000 linear >> iterations for each eps iteration. You may experiment with stronger >> pc_type, e.g., '-pc_type asm' etc. >> >> I'll let you know why sbaij crashes. >> >> Hong >> >> On Mon, Jul 28, 2014 at 4:52 PM, Jose E. Roman <[email protected]> >> wrote: >> > >> > El 28/07/2014, a las 23:48, jifeng zhao escribió: >> > >> >> Hi Barry, >> >> >> >> Thanks for the reply. I see. I am still testing it and looking for the >> bug. >> >> >> >> It is pretty weird that the error appears, since the code I am running >> is ex7 and I didn't change anything. >> >> >> >> My matrices are assembled in binary files separately. As I explained >> earlier, I have a series of matrices to solve, each of them have the same >> patterns but with different values. The way I assembly the matrix has >> proven to be correct for all the other cases. Only for this one, when the >> matrix has an zero eigenvalue, ex7 failed to solve it. >> >> >> >> In fact, I don't understand why this "Out of range" error could >> possibly appear? 1. my matrices have the correct parrellel lay up. 2. In >> ex7, I am not explicitly accessing to any elements at all! All I did is >> EPSSolve(); >> >> >> >> Any ideas? >> >> >> >> Best regards, >> >> Jifeng Zhao >> >> >> > >> > Tomorrow we will release slepc-3.5. I would suggest trying with the new >> version. If the problem persist we can help to track down the problem. >> > >> > Jose >> > >> > > > > -- > Jifeng Zhao > PhD candidate at Northwestern University, US > Theoretical and Applied Mechanics Program > -- Jifeng Zhao PhD candidate at Northwestern University, US Theoretical and Applied Mechanics Program
