[Users] weird behavior with some ET simulations

[Antoni Ramos Buades]

Hi,

setting the parameter CarpetRegrid2::min_fraction = 1 solves the problem of
the noise outburst ( I attach the file waveformMinfraction1.png that you
can compare to the older waveforms.png where the noise is present). We have
checked the problem with the new version of the EinsteinToolkit which is in
the website and with version of 2017 which we were using and the noise
disappeared in both. In terms of speed, the run with min_fraction=1 is
slightly slower with respect to the older with min_fraction=0.9, but not
significantly. I would like to thank again everybody for the quick feedback
and help.

Best Regards,
Toni.


El jue., 7 mar. 2019 a las 16:00, Sascha Husa (<sascha.husa at gmail.com>)
escribió:

>
>
> On Thu, Mar 7, 2019 at 3:56 PM Ian Hinder <ian.hinder at manchester.ac.uk>
> wrote:
>
>>
>>
>> On 7 Mar 2019, at 14:50, Antoni Ramos Buades <antoniramosbuades at gmail.com>
>> wrote:
>>
>> Thanks a lot Zach, Roland and Ian for your comments. We are currently
>> compiling the last version of the EinsteinToolkit and we will make some
>> runs with different values of CarpetRegrid2::min_fraction to check if the
>> noise disappears. We will report you the results in a few days.
>>
>>
>> Hi Toni,
>>
>> I suggest to change just one thing at a time; i.e. take the old version
>> of the code that you ran with before, change just this one parameter, and
>> rerun the simulation.  If you change too many things at the same time (and
>> you are thinking of making 2 years worth of changes!), the results might be
>> different for many more reasons, and it's hard to reason about the problem.
>>
>
> The plan is to make tests with both the new and old versions of the code.
> We produced a setup where the problems appears relatively soon, so this
> won't be too expensive.
>
> Thanks for the quick feedback everybody!
> cheers,
> -sascha
>
>
>>
>> --
>> Ian Hinder
>> Research Software Engineer
>> University of Manchester, UK
>>
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>>
>
>
> --
>
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> Departament de Fisica, Universitat de les Illes Balears   &
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