[petsc-users] SuperLU_dist issue in 3.7.4 failure of repeated calls to MatLoad() or MatMPIAIJSetPreallocation() with the same matrix

[Anton Popov]

On 10/24/2016 05:47 PM, Hong wrote:
> Barry,
> Your change indeed fixed the error of his testing code.
> As Satish tested, on your branch, ex16 runs smooth.
>
> I do not understand why on maint or master branch, ex16 creases inside 
> superlu_dist, but not with mumps.
>

I also confirm that ex16 runs fine with latest fix, but unfortunately 
not my code.

This is something to be expected, since my code preallocates once in the 
beginning. So there is no way it can be affected by multiple 
preallocations. Subsequently I only do matrix assembly, that makes sure 
structure doesn't change (set to get error otherwise).

Summary: we don't have a simple test code to debug superlu issue anymore.

Anton

> Hong
>
> On Mon, Oct 24, 2016 at 9:34 AM, Satish Balay <balay at mcs.anl.gov 
> <mailto:balay at mcs.anl.gov>> wrote:
>
>     On Mon, 24 Oct 2016, Barry Smith wrote:
>
>     >
>     > > [Or perhaps Hong is using a different test code and is observing bugs
>     > > with superlu_dist interface..]
>     >
>     >    She states that her test does a NEW MatCreate() for each
>     matrix load (I cut and pasted it in the email I just sent). The
>     bug I fixed was only related to using the SAME matrix from one
>     MatLoad() in another MatLoad().
>
>     Ah - ok.. Sorry - wasn't thinking clearly :(
>
>     Satish
>
>

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