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

[Barry Smith]

   Valgrind doesn't report any problems?


> On Oct 24, 2016, at 12:09 PM, Anton Popov <popov at uni-mainz.de> wrote:
> 
> 
> 
> 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> 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
>> 
>