[petsc-users] Benchmarking

[Vijay Gopal Chilkuri]

Dear Jed,

I will try to answer your questions. I've started a calculation with the
-eps_view and -log_view and send you the output once it is done.

On Wed, Dec 28, 2016 at 4:42 PM, Jed Brown <jed at jedbrown.org> wrote:

> Vijay Gopal Chilkuri <vijay.gopal.c at gmail.com> writes:
>
>
> How sparse is your matrix, where does it come from (affects spectrum and
> thus convergence rate),


The matrix is a variant of the Double Exchange model Hamiltonian. It has at
most 48 non-zero elements per row.


> how many eigenvalues did you request, and what
> preconditioner did you use?


I requested for 2 eigenvalues. I used the krylovshur solver from the SLEPc
package with the default preconditioner.

I'm curious about the preconditioner thing. Can you suggest some suitable
for my system ?

Thanks a lot !
 Vijay


> Sending the output of running with
> -eps_view -log_view is necessary to start understanding the performance.
>
> > I have two questions:
> >
> > 1. Is this time reasonable, if not, is it possible to optimize further ?
> >
> > 2. I've tried a quick google search but could not find a comprehensive
> > benchmarking of the SLEPc library for sparse matrix diagonalization.
> Could
> > you point me to a publication/resource which has such a benchmarking ?
> >
> > Thanks for your help.
> >
> > PETSc Version: master branch commit: b33322e
> > SLEPc Version: master branch commit: c596d1c
> >
> > Best,
> >  Vijay
>
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