[petsc-dev] boomerAmg scalability

[Matthew Knepley]

On Wed, Jan 11, 2012 at 12:23 PM, Ravi Kannan <rxk at cfdrc.com> wrote:

> Hi Mark,****
>
> ** **
>
> I downloaded the dev version again. This time, the program crashes even
> earlier. Attached is the serial and parallel info outputs.****
>
> ** **
>
> Could you kindly take a look.
>

It looks like this is a problem with MatMatMult(). Can you try to reproduce
this using KSP ex10? You put
your matrix in binary format and use -pc_type gamg. Then you can send us
the matrix and we can track
it down. Or are you running an example there?

  Thanks,

    Matt



>
>
> Thanks,****
>
> Ravi.****
>
> ** **
>
> *From:* petsc-dev-bounces at mcs.anl.gov [mailto:
> petsc-dev-bounces at mcs.anl.gov] *On Behalf Of *Mark F. Adams
> *Sent:* Monday, January 09, 2012 3:08 PM
>
> *To:* For users of the development version of PETSc
> *Subject:* Re: [petsc-dev] boomerAmg scalability****
>
> ** **
>
> Yes its all checked it, just pull from dev.****
>
> Mark****
>
> ** **
>
> On Jan 9, 2012, at 2:54 PM, Ravi Kannan wrote:****
>
>
>
> ****
>
> Hi Mark,****
>
>  ****
>
> Thanks for your efforts.****
>
>  ****
>
> Do I need to do the install from scratch once again? Or some particular
> files (check out gamg.c for instance)?****
>
>  ****
>
> Thanks,****
>
> Ravi.****
>
>  ****
>
> *From:* petsc-dev-bounces at mcs.anl.gov [mailto:
> petsc-dev-bounces at mcs.anl.gov] *On Behalf Of *Mark F. Adams
> *Sent:* Friday, January 06, 2012 10:30 AM
> *To:* For users of the development version of PETSc
> *Subject:* Re: [petsc-dev] boomerAmg scalability****
>
>  ****
>
> I think I found the problem.  You will need to use petsc-dev to get the
> fix.****
>
>  ****
>
> Mark****
>
>  ****
>
> On Jan 6, 2012, at 8:55 AM, Mark F. Adams wrote:****
>
>
>
>
> ****
>
> Ravi, I forgot but you can just use -ksp_view_binary to output the matrix
> data (two files).  You could run it with two procs and a Jacobi solver to
> get it past the solve, where it writes the matrix (I believe).****
>
> Mark****
>
>  ****
>
> On Jan 5, 2012, at 6:19 PM, Ravi Kannan wrote:****
>
>
>
>
> ****
>
> Just send in another email with the attachment.****
>
>  ****
>
> *From:* petsc-dev-bounces at mcs.anl.gov [mailto:
> petsc-dev-bounces at mcs.anl.gov] *On Behalf Of *Jed Brown
> *Sent:* Thursday, January 05, 2012 5:15 PM
> *To:* For users of the development version of PETSc
> *Subject:* Re: [petsc-dev] boomerAmg scalability****
>
>  ****
>
> On Thu, Jan 5, 2012 at 17:12, Ravi Kannan <rxk at cfdrc.com> wrote:****
>
> I have attached the verbose+info outputs for both the serial and the
> parallel (2 partitions). NOTE: the serial output at some location says
> PC=Jacobi! Is it implicitly converting the PC to a Jacobi?****
>
>  ****
>
> Looks like you forgot the attachment.****
>
>  ****
>
>  ****
>
> ** **
>



-- 
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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