KSPCR with PCILU generally slower with v2.3.3 than with 2.3.0

[Barry Smith]

    This could also be the result of changes in the way we test for  
convergence.
Try with -ksp_truemonitor and see if it is using the same number of  
iterations
to converge.

    Barry

On Jun 5, 2008, at 5:35 AM, Etienne PERCHAT wrote:

> Hello,
>
> I'm solving MPIBAIJI matrices using KSPCR preconditioned by a  
> PCBJACOBI
> between sub domains and PCILU with a fill ratio of 1 on each sub  
> domain.
>
> Solving exactly the same linear systems, I notice that the solution is
> slower using v2.3.3p8 than with v2.3.0.
> The behavior is not very clear: v2.3.3p8 is generally slower (10 % or
> more) but on some systems it happen to be really faster (may be 40 %).
>
> Unhappily in my case at the end I'm always slower ...
>
> Did somebody noticed such behavior? Is there changes if I upgrade to
> current 2.3.3p13 version (I've seen a fix:" fix error with using
> mpirowbs & icc & ksp_view") ?
>
> Thanks,
> Etienne Perchat
>
>