[Users] SubstepOutput

[Erik Schnetter]

On Fri, Mar 16, 2012 at 7:03 AM, Ian Hinder <ian.hinder at aei.mpg.de> wrote:
> Hi all,
>
> I have a small thorn which might be useful for debugging.  It enables output of grid variables on each MoL substep, so you can see what is happening on each one.  The variables are output into files with the substep number appended, so you get, for example,
>
>        phi.x.asc
>        phi_0.x.asc
>        phi_1.x.asc
>        phi_2.x.asc
>
> for a 3-step method (e.g. RK3).  The first step is 0 (in contrast to how MoL counts internally, which is backwards).
>
> This happens
>
>        in MoL_Step after MoL_RHSBoundaries before MoL_NaNCheck

This means that the output corresponds to the internal state just
before the respective step, right? If so, that should be worth
mentioning -- Cactus output for iteration N corresponds to the state
after iteration N, not before.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>
http://www.perimeterinstitute.ca/personal/eschnetter/