[Users] [Commits] [svn:einsteintoolkit] WeylScal4/trunk/test/teukolsky/ (Rev. 129)

[Ian Hinder]

On 27 Nov 2012, at 09:50, Roland Haas <roland.haas at physics.gatech.edu> wrote:

> Hello all,
> 
>> This sounds like it might change results for more than just this one
>> test case.  Does more test data need to be regenerated, and does this
>> affect reproducibility of simulations?  Erik, what was the reason for
>> this change in Carpet?  Am I worrying for nothing?
> As far as I can tell:
> 
> We have few tests using mesh refinement, so not many tests are affected.
> Other than this it was tests in Dissipation. As far as real world
> simulations are concerned I expect that every simulation that uses
> init_fill_timelevels (ie. very many) will see changes in its evolved
> variables (but no changes at t=0 where all timelevels align).
> The changes are in the buffer zones only if we have ID where ID values
> depend only on position (and not eg on taking finite difference
> derivatives) which includes eg. TwoPunctures. All of this is true for
> vertex centered data. Cell centered data is different everywhere since
> restriction is no longer just a copy operation.

Thanks.  What was the reason for the change?  Was it incorrect before?

-- 
Ian Hinder
http://numrel.aei.mpg.de/people/hinder