On Wed, 30 Jul 2008, Shengli Xu wrote: > But in next iteration the refinement level is 2, The process of system > assembling is very very slowly. It took more than 12 hours when only > assembled 30000 elements. The system and mesh information is :
> n_dofs()=253785 > Is the system too large for only one processor? Large enough that you can't quickly solve many time steps on one processor, maybe... but large enough that one assembly should take 12 hours? Definitely not. There's some sort of bug here. If you could any more specific profiling information, it would help. The only culprit I've heard of that can destroy your assembly speed is if you try to assemble a bunch of matrices with entries outside PETSc's precalculated sparsity pattern, but before we figure out why that might be happening to you it would be a good idea to verify that that's what's happening. --- Roy ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
