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

[Tobias Neckel]

Dear Hong,

thanks for your quick answer.

> Yes, we replace it with superlu's ilu with drop tolerance.
> To use it, configure petsc with '--download-superlu --download-parmetis'
> Then run your code with option
> -pc_type ilu -pc_factor_mat_solver_package superlu -mat_superlu_ilu_droptol<>
>
> see available options with '-help |grep superlu'

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).

> Suggest to use petsc-dev for such function, because we have fixed
> several bugs in superlu interface.

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

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
>>