[petsc-dev] PCApply_PBJacobi_7

Hong hzhang at mcs.anl.gov
Mon Mar 27 10:00:06 CDT 2017


Fixed
https://bitbucket.org/petsc/petsc/commits/79cd6d079a316048b19f539cf806a8cfa87064d9

Hong

On Mon, Mar 27, 2017 at 9:39 AM, Hong <hzhang at mcs.anl.gov> wrote:

> Pierre:
>
>> Hello,
>> PCApply_PBJacobi FLOPs complexity is bs*(2*bs-1)*m.
>> How do you come up with PetscLogFlops(80.0*m) in PCApply_PBJacobi_7
>> (src/ksp/pc/impls/pbjacobi/pbjacobi.c), please?
>>
>
> You are correct. It should be 7*(2*7-1) = 91*m
> Also, it should be m for PCApply_PBJacobi_1() (not 2*m).
>
> I'll fix them in petsc-maint.
> Thanks for reporting it!
>
> Hong
>
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