scaling in 4-core machine: unassembled structured

2009-11-20 Thread jaru...@ascomp.ch
Getting better multicore performance requires changing the algorithms to better reuse L1 cache. This means moving away from assembled matrices where possible and of course finding good preconditioners. I do not know how to move away from assembled matrix. As I have to reset values to the

suprelu

2009-11-20 Thread Satish Balay
works fine for me. Perhaps you can retry after 'rm -rf externalpackages' If the problem persists - send configure.log to petsc-maint at mcs.anl.gov Satish On Fri, 20 Nov 2009, Lukasz Kaczmarczyk wrote: Hello I try to configure petsc (p9) with SuperLU and I get error message

Change orthogonalization option in fortran?

2009-11-20 Thread Barry Smith
Sorry, we don't have the Fortran interfaces for these operations. You can use call PetscOptionsSet(- ksp_gmres_classicalgramschmidt,PETSC_NULL_CHARACTER,ierr) call PetscOptionsSet(- ksp_gmres_cgs_refinement_type,REFINE_IFNEEDED,ierr) before creating the KSP object. Barry

suprelu

2009-11-20 Thread Lukasz Kaczmarczyk
Thanks, for help. Strange enough It is working now. Regards, Lukasz On 20 Nov 2009, at 17:33, Barry Smith wrote: Please send configure.log to petsc-maint at mcs.anl.gov Looks like you have a corrupt tar.gz file; recommend deleting it and getting it again. Barry On Nov 20,