Using ML and options

Hi, Sorry I made a mistake. The ex2f uses default pc and ksp and hence it is actually using GMRES. I've tested some other options of ml like -pc_ml_CoarsenScheme, -pc_mg_cycles, -pc_ml_maxNlevels but the answer (if there's one) is much slower. Also, for the CoarsenScheme, if I use METIS, I als

Using ML and options

Hi, I tried to test ml using "-pc_type ml" on my problem. It was working ok using LU or hypre/boomeramg. However I got the warning: Gen_Prolongator warning : max eigen <= 0.0 Gen_Prolongator warning : max eigen <= 0.0 Gen_Prolongator warning : max eigen <= 0.0 Gen_Prolongator warning : max eigen

Using ML and options

Ben, > > I tried to test ml using "-pc_type ml" on my problem. It was working ok > using LU or hypre/boomeramg. However I got the warning: > > Gen_Prolongator warning : max eigen <= 0.0 > Gen_Prolongator warning : max eigen <= 0.0 > Gen_Prolongator warning : max eigen <= 0.0 > Gen_Prolongator warn

Using ML and options

On Fri, 17 Aug 2007, Ben Tay wrote: > Hi, > > I tried to test ml using "-pc_type ml" on my problem. It was working ok using > LU or hypre/boomeramg. However I got the warning: > > Gen_Prolongator warning : max eigen <= 0.0 > Gen_Prolongator warning : max eigen <= 0.0 > Gen_Prolongator warning