[petsc-users] Monte carlo for eigenvalue problem in paralle

Luc Berger-Vergiat lb2653 at columbia.edu
Wed Jan 21 09:55:33 CST 2015

You can also look into SLEPc to compute eigenvalues in parallel for the 
global system.
SLEPc is based on PETSc so it should not be too hard to use in your code.


On 01/21/2015 10:53 AM, Matthew Knepley wrote:
> On Wed, Jan 21, 2015 at 9:51 AM, siddhesh godbole 
> <siddhesh4godbole at gmail.com <mailto:siddhesh4godbole at gmail.com>> wrote:
>     Hello,
>     I want to execute Monte Carlo simulations for eigenvalue problem
>     in parallel with PETSC. i am using LAPACKsygvx function to compute
>     all the eigenvalues. Now the problem i am facing is that, i think
>     LAPACKsygvx requires Matrices to be declared as MATSEQDENSE, and
>     this sequential type is not allowing me to execute this program on
>     multiple processors.
>     How should i go about this problem? can i use different
>     communicators or something? Please help!
> Do you need all the eigenvalues? If so, you can try to use Elemental, 
> with the development version of PETSc.
>   Thanks,
>     Matt
>     *Siddhesh M Godbole*
>     5th year Dual Degree,
>     Civil Eng & Applied Mech.
>     IIT Madras
> -- 
> What most experimenters take for granted before they begin their 
> experiments is infinitely more interesting than any results to which 
> their experiments lead.
> -- Norbert Wiener

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