[petsc-users] SuperLU_dist bug with parallel symbolic factorisation

[Fande Kong]

Hi Eric,

I am curious if the parallel symbolic factoriation is faster than
the sequential version? Do you have timing?


Fande,

On Tue, May 22, 2018 at 12:18 PM, Eric Chamberland <
Eric.Chamberland at giref.ulaval.ca> wrote:

>
>
> On 22/05/18 02:03 PM, Smith, Barry F. wrote:
>
>>
>>     Hmm, why would
>>
>> the resolution with *sequential* symbolic factorisation gives ans err
>>> around 1e-6 instead of 1e-16 for parallel one (when it works).
>>>
>>
>>    ? One would think that doing a "sequential" symbolic factorization
>> won't affect the answer to this huge amount? Perhaps this is the problem
>> that needs to be addressed.
>>
>>
> I do agree that this is a huge amount of difference... and if we agree
> this is also a bug, than it means there are not one but two bugs that
> deserve to be fixed...
>
> Thanks,
>
> Eric
>
>
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