[petsc-users] MUMPS issue

[venkatesh g]

Thanks. I now have a better matrix B in my eigenproblem than last time. Now
I included MUMPS. I get this error when I give large matrices to solve:

'Error reported by MUMPS in numerical factorization phase: INFO(1)=-1,
INFO(2)=0'

I checked the manual, there is only one instance of INFO(2)=0 and I am not
able to get it.

Can someone help.

cheers,

Venkatesh



On Mon, May 25, 2015 at 6:56 PM, Jose E. Roman <jroman at dsic.upv.es> wrote:

> Once again, you need a parallel linear solver.
> Read FAQ #6 and the corresponding section on the users manual.
> http://slepc.upv.es/documentation/faq.htm
> Jose
>
>
> El 25/05/2015, a las 15:18, venkatesh g escribió:
>
> > Hi,
> >
> > I am solving the generalized eigen problem Ax=lambda Bx given in EX7 in
> Slepc manual.
> >
> > Now I have restructured my matrix and I get reasonable answers.
> >
> > However, when I submit the problem in multiple cores, it is accessing a
> large amount of memory than a serial job.
> >
> > 1 Serial job  - Amount of memory used = 18 GB
> >
> > Parallel job in 240 cores - Amount of memory used = 456 GB
> >
> > I have attached the performance log for the run.
> >
> > I think it is loading the full matrix in each core for a parallel job,
> but I am not sure how to resolve or whether I am correct..
> >
> > Kindly help.
> >
> > cheers,
> > Venkatesh
> >
> > <performance_log.txt>
>
>
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