> On Feb 23, 2016, at 2:03 PM, Justin Chang wrote:
>
> Two more questions, somewhat related maybe.
>
> Is there a practical case where one would use plain Jacobi preconditioning
> over ILU?
For well conditioned problems an iteration of Jacobi is cheaper than an
iteration of ILU (about 1/2
Two more questions, somewhat related maybe.
Is there a practical case where one would use plain Jacobi preconditioning
over ILU?
Also, what exactly is happening when one uses -pc_bjacobi_blocks 2 ?
Thanks,
Justin
On Wed, Jan 13, 2016 at 9:37 PM, Justin Chang wrote:
> Thanks Satish,
>
> And ye
Thanks Satish,
And yes I meant sequentially.
On Wed, Jan 13, 2016 at 8:26 PM, Satish Balay wrote:
> On Wed, 13 Jan 2016, Justin Chang wrote:
>
> > Hi all,
> >
> > What exactly is the difference between these two preconditioners? When I
> > use them to solve a Galerkin finite element poisson pro
On Wed, 13 Jan 2016, Justin Chang wrote:
> Hi all,
>
> What exactly is the difference between these two preconditioners? When I
> use them to solve a Galerkin finite element poisson problem, I get the
> exact same performance (iterations, wall-clock time, etc).
you mean - when you run sequential
Hi all,
What exactly is the difference between these two preconditioners? When I
use them to solve a Galerkin finite element poisson problem, I get the
exact same performance (iterations, wall-clock time, etc). Only thing is I
can't seem to use ILU in parallel though.
Thanks,
Justin
