Hi, I'm working on standard eigensolving with spectrum transform. I tried mumps and superlu_dist for ST. But I found that when I run my program with more process, execution time of mumps decrease, but time of superlu_dist increase. Both of them are called by options like
char common_options[] = "-st_ksp_type preonly -st_pc_type lu -st_pc_factor_mat_solver_package mumps"; ierr = PetscOptionsInsertString(common_options);CHKERRQ(ierr); Shall I set more parameters to get benefit of parallel computing when using superlu_dist? My mattype is mpiaij. Your sincerely Guoxi
