[petsc-users] Profiling objects creation

[Matthew Knepley]

On Tue, Jun 10, 2025 at 7:44 AM SCOTTO Alexandre <
alexandre.scotto at irt-saintexupery.com> wrote:

> Hello Mat,
>
>
>
> Thanks for your answer. I think this object is not available in petsc4py,
> at least I do not see any related elements in the documentation
> https://urldefense.us/v3/__https://petsc.org/main/petsc4py/reference/petsc4py.PETSc.html__;!!G_uCfscf7eWS!cksrPnF_zRr19WbGYSajXPttTjWjk6YeKgg0Gp8Lk-nyTXp1XdibretqDhGHAAPWTauMuS1SLlgxba-1ldY8$ 
>
>
>
> So maybe this is not accessible in Python.
>

Yes, it looks like the new LogHandler interface, necessary for nested
logging like flamegraphs, is not in petsc4py. We will have to add it.

  Thanks,

     Matt


>
>
> Regards,
>
> Alexandre.
>
>
>
> *De :* Matthew Knepley <knepley at gmail.com>
> *Envoyé :* mardi 10 juin 2025 13:28
> *À :* SCOTTO Alexandre <alexandre.scotto at irt-saintexupery.com>
> *Cc :* petsc-users at mcs.anl.gov
> *Objet :* Re: [petsc-users] Profiling objects creation
>
>
>
> On Tue, Jun 10, 2025 at 5:30 AM SCOTTO Alexandre via petsc-users <
> petsc-users at mcs.anl.gov> wrote:
>
> Dear PETSc community,
>
>
>
> I am using the PETSc API petsc4py and I am interested in profiling the
> number of PETSc objects created during the run of my script.
>
>
>
> I have used the -log_view option to get information on the run in a
> dedicated file, and I got this (among other infirmation):
>
>
>
>
>
> This is precisely the information I am interested in, but here only the
> process 0 is tracked.
>
>
>
> I is possible to have the same type of information for all the processes?
> I went through the documentation and was not able to figure it out.
>
>
>
> You want to access
>
>
>
>   https://urldefense.us/v3/__https://petsc.org/main/manualpages/Log/PetscLogState/__;!!G_uCfscf7eWS!cksrPnF_zRr19WbGYSajXPttTjWjk6YeKgg0Gp8Lk-nyTXp1XdibretqDhGHAAPWTauMuS1SLlgxbRt_afMq$ 
>
>
>
> which you get using
>
>
>
>   https://urldefense.us/v3/__https://petsc.org/main/manualpages/Log/PetscLogGetState/__;!!G_uCfscf7eWS!cksrPnF_zRr19WbGYSajXPttTjWjk6YeKgg0Gp8Lk-nyTXp1XdibretqDhGHAAPWTauMuS1SLlgxbelDML9w$ 
>
>
>
>    Thanks,
>
>
>
>      Matt
>
>
>
> Thanks in advance,
>
> Regards.
>
>
>
>
> --
>
> 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
>
>
>
> https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!cksrPnF_zRr19WbGYSajXPttTjWjk6YeKgg0Gp8Lk-nyTXp1XdibretqDhGHAAPWTauMuS1SLlgxbbSWAeiw$ 
> <https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!cksrPnF_zRr19WbGYSajXPttTjWjk6YeKgg0Gp8Lk-nyTXp1XdibretqDhGHAAPWTauMuS1SLlgxbfwBVdvC$ >
>


-- 
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

https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!cksrPnF_zRr19WbGYSajXPttTjWjk6YeKgg0Gp8Lk-nyTXp1XdibretqDhGHAAPWTauMuS1SLlgxbbSWAeiw$  <https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!cksrPnF_zRr19WbGYSajXPttTjWjk6YeKgg0Gp8Lk-nyTXp1XdibretqDhGHAAPWTauMuS1SLlgxbfwBVdvC$ >
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