scaling in 4-core machine: unassembled structured
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 matrix in each iteration, I oblige to call MatAssemblyBegin() and MatAssemblyEnd(). Is there other option to create and set values the matrix?? High-order and fast multipole methods are good for this. For example, please? Jarunan -- Jarunan Panyasantisuk Development Engineer ASCOMP GmbH, Technoparkstr. 1 CH-8005 Zurich, Switzerland Phone : +41 44 445 4072 Fax : +41 44 445 4075 E-mail: jarunan at ascomp.ch www.ascomp.ch
suprelu
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 * UNABLE to CONFIGURE with GIVEN OPTIONS(see configure.log for details): --- Error unzipping _d_SuperLU_DIST.tar.gz: Could not execute 'cd /Users/likask/MyBuild/src/petsc-3.0.0-p9/externalpackages; gunzip _d_SuperLU_DIST.tar.gz': gzip: _d_SuperLU_DIST.tar.gz: not in gzip format * Regards, Lukasz
Change orthogonalization option in fortran?
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 On Nov 19, 2009, at 1:14 PM, hxie at umn.edu wrote: Hi, I want to change the method for orthogonalization for the default ksp solver in fortran. I added the following in my code: -- call KSPGMRESSetOrthogonalization (ksp,KSPGMRESClassicalGramSchmidtOrthogonalization,pterr) call KSPGMRESSetCGSRefinementType (ksp,KSP_GMRES_CGS_REFINEMENT_IFNEEDED,pterr) -- And I got the following error message when compiling. -- error #6404: This name does not have a type, and must have an explicit type. [KSPGMRESCLASSICALGRAMSCHMIDTORTHOGONALIZATI] call KSPGMRESSetOrthogonalization (ksp,KSPGMRESClassicalGramSchmidtOrthogonalization,pterr) error #6404: This name does not have a type, and must have an explicit type. [KSP_GMRES_CGS_REFINEMENT_IFNEEDED] call KSPGMRESSetCGSRefinementType (ksp,KSP_GMRES_CGS_REFINEMENT_IFNEEDED,pterr) -- If I comment these two lines, the code is OK. Any idea for this? Thanks. Bests, Hui
suprelu
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, 2009, at 11:22 AM, Lukasz Kaczmarczyk wrote: Hello I try to configure petsc (p9) with SuperLU and I get error message * UNABLE to CONFIGURE with GIVEN OPTIONS(see configure.log for details): --- Error unzipping _d_SuperLU_DIST.tar.gz: Could not execute 'cd /Users/likask/MyBuild/src/petsc-3.0.0-p9/externalpackages; gunzip _d_SuperLU_DIST.tar.gz': gzip: _d_SuperLU_DIST.tar.gz: not in gzip format * Regards, Lukasz Lukasz Kaczmarczyk Lecturer Department of Civil Engineering, University of Glasgow, GLASGOW, G12 8LT Tel: +44 141 3305348 email: likask at civil.gla.ac.uk web: http://www.civil.gla.ac.uk/~kaczmarczyk/ web: http://code.google.com/p/yaffems/
