[petsc-dev] boomerAmg scalability

[Ravi Kannan]

Hi Mark,

 

Any luck with the gamg bug fix?

 

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: Wednesday, January 11, 2012 1:54 PM
To: For users of the development version of PETSc
Subject: Re: [petsc-dev] boomerAmg scalability

 

This seems to be dying earlier than it was last week, so it looks like a new
bug in MatTransposeMatMult.

 

Mark

 

On Jan 11, 2012, at 1:59 PM, Matthew Knepley wrote:





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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