So should I always use an odd number of grid points? There is no way around this?
Michele On 05/17/2013 03:53 PM, Jed Brown wrote:
Michele Rosso <[email protected]> writes:I added KSPSetDM() and now the error I receive is: [0]PETSC ERROR: --------------------- Error Message ------------------------------------ [0]PETSC ERROR: No support for this operation for this object type! [0]PETSC ERROR: For coloring efficiency ensure number of grid points in X is divisible by 2*stencil_width + 1 ! [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: Petsc Release Version 3.3.0, Patch 3, Wed Aug 29 11:26:24 CDT 2012 [0]PETSC ERROR: See docs/changes/index.html for recent updates. [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting. [0]PETSC ERROR: See docs/index.html for manual pages. [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: ./hit on a named nid25119 by Unknown Fri May 17 17:41:05 2013 [0]PETSC ERROR: Libraries linked from [0]PETSC ERROR: Configure run at [0]PETSC ERROR: Configure options [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: DMCreateColoring_DA_3d_MPIAIJ() line 288 in src/dm/impls/da/fdda.c [0]PETSC ERROR: DMCreateColoring_DA() line 172 in src/dm/impls/da/fdda.c [0]PETSC ERROR: DMCreateColoring() line 709 in src/dm/interface/dm.c [0]PETSC ERROR: DMComputeJacobian() line 2206 in src/dm/interface/dm.c [0]PETSC ERROR: KSPSetUp() line 228 in src/ksp/ksp/interface/itfunc.c My 3D grid is composed by 256^3 nodes, I am using 4 processors and the the DMDA is initialized as:Yes, with a vertex-centered discretization, use 257^3 instead.
