On Jun 21, 2012, at 3:40 PM, Matthew Knepley wrote:
> On Thu, Jun 21, 2012 at 2:08 PM, Blaise Bourdin <bourdin at lsu.edu> wrote:
>
> On Jun 21, 2012, at 2:55 PM, Matthew Knepley wrote:
>
>> On Thu, Jun 21, 2012 at 1:11 PM, Blaise Bourdin <bourdin at math.lsu.edu>
>> wrote:
>> Hi,
>>
>> PetscLogView does not display the same amount of information as running with
>> -log_summary. In the "summary of stages" section, the former contains only
>> information on the main stage while the later contains much more.
>>
>> Add the following block at the end of src/snes/examples/tutorials/ex1.c, for
>> instance, to see what I mean
>> PetscViewer viewer;
>> ierr =
>> PetscViewerASCIIOpen(PETSC_COMM_WORLD,"ex1-log.py",&viewer);CHKERRQ(ierr);
>> ierr = PetscLogViewPython(viewer);CHKERRQ(ierr);
>> ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr);
>> ierr =
>> PetscViewerASCIIOpen(PETSC_COMM_WORLD,"ex1-log.txt",&viewer);CHKERRQ(ierr);
>> ierr = PetscLogView(viewer);CHKERRQ(ierr);
>> ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr);
>> ierr =
>> PetscLogPrintDetailed(PETSC_COMM_WORLD,"ex1-logdetailed.txt");CHKERRQ(ierr);
>>
>> Is this a bug or a feature? Is there a way to get the same output as
>> -log_summary in a file, without printing it to stdout?
>>
>> -log_summary just calls PetscLogView(). I am not sure how there could be a
>> problem. I will run it. However, can you
>> just use
>>
>> -log_summary <filename>
>
> That works, yes. Is the issue that stages / events need to be activated a
> priori, which is not possible when PetscLogView is only called at the end of
> the program?
>
> Crap.
Matt, why is this "Crap" its completely reasonable that if you want to
have logging from program control that you have to turn it on programatically?
> If you do not provide -log_summary, you need PetscLogBegin() at the beginning.
>
> Matt
>
> The caveat is that I am assuming that when using log_summary, the log is
> written as part of PetscFinalize, so that if a job is killed by the sceduler
> or the user, there is no way to get an idea of the performances. I like to
> print the log every so often.
>
> Blaise
>
> --
> Department of Mathematics and Center for Computation & Technology
> Louisiana State University, Baton Rouge, LA 70803, USA
> Tel. +1 (225) 578 1612, Fax +1 (225) 578 4276
> http://www.math.lsu.edu/~bourdin
>
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> --
> 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
