[petsc-users] no PCFactorSetUseDropTolerance() in 3.1-p6

[Hong Zhang]

Tobias :

> Ah, ok. Is there a possibility to hardwire that in the source code? We run
> different integration tests with different solver/pc combinations with one
> single executable call (currently without any options).

Yes. We've added MatSuperluSetILUDropTol() procedural call to petsc-dev.
See http://www.mcs.anl.gov/petsc/petsc-as/developers/index.html
on how to get petsc-dev.
~petsc-dev/src/ksp/ksp/examples/tutorials/ex52.c is an example
on how to use it.

> Ok, thanks. Will this functionality be available also in the next release
> (p7) and when is this expected (approximately)?

It will be included in next petsc release (v3.2). When?
early next year I guess :-)

Hong
>
> Thanks and best regards
> Tobias
>
>>> we recently switched from 3.0.0-p11 to 3.1-p6 and are now facing a minor
>>> problem in some of our test cases: We use seqaij matrix format and GMRES
>>> with ILU dt.
>>>
>>> Our code contained a statement using PCFactorSetUseDropTolerance() which
>>> does not exist any longer. So we renamed the function call to
>>> PCFactorSetDropTolerance (same signature) which has no online docu but
>>> found
>>> by google ;-) Obviously, this function has not the same functionality as
>>> our
>>> tests fail.
>>>
>>> In 3.0.0-p11, the docu of the "Summary of Sparse Linear Solvers Available
>>> from PETSc" showed a line containing:
>>> ILU dt: ILU dt  seqaij  Sparsekit (table survey)
>>>
>>> This is not included in the docu of 3.1-p6
>>>
>>> (http://www.mcs.anl.gov/petsc/petsc-as/documentation/linearsolvertable.html
>>> ) any more. Does that mean that the ILU dt version is not supported by
>>> the
>>> (default) petsc? I also checked the changelog but did not find anything
>>> there; sorry if I missed sth.
>>>
>>> Any help or infos will be highly appreciated ;-)
>>>
>>> Thanks and best regards
>>> Tobias
>>>
>