[petsc-users] memory reporting

[Matthew Knepley]

On Mon, Apr 1, 2013 at 2:00 AM, Michael Povolotskyi <mpovolot at purdue.edu>wrote:

>  On 3/31/2013 10:19 AM, Jed Brown wrote:
>
>
> On Sun, Mar 31, 2013 at 9:15 AM, Michael Povolotskyi <mpovolot at purdue.edu>wrote:
>
>> In our code we have our own linear system solver, optimized for a
>> distributed 3 block diagonal matrix.
>> We are testing its performance against MUMPS and SUPERLU_dist.
>> We interfaced this solver with PETSc matrix and vector for the left and
>> right hand sides of a linear system.
>> My question: what can I do to make the memory allocated inside the solver
>> to be reported by  PetscMemoryGetCurrentUsage?
>>
>
> This function just uses the process resident size (like getrusage(3)) so
> that external memory is automatically included. If those packages had their
> own memory profiling support, we could use it, but they do not so we can't
> give finer grained information about the memory they are using.
>
> Hi,
> I'm a bit confused:
> The web page about PetscMemoryGetCurrentUsage says: gets the current
> amount of memory used that was PetscMalloc()ed
>

I don't think it does:


http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscMemoryGetCurrentUsage.html

    Matt


> So, how then it can include the external memory if it is not allocated by
> PetscMalloc() ?
> Thank you.
>



-- 
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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