[Users] highest output frequency for CarpetIOBasic?

[Frank Loeffler]

Cactus iterations depend on the maximal number of possible refinement levels. If you then don't use all of them the iteration counter increases by an exponent of 2. The output parameter depends on the counter, not the actual number of iterations (which is different for different levels anyway)

Frank

Am 01.12.2011 um 10:00 schrieb "Kelly, Bernard J. (GSFC-660.0)[UNIVERSITY OF MARYLAND BALTIMORECOUNTY]" <bernard.j.kelly at nasa.gov>:

> Hi all.
> 
> Something new (I think) and trivial, but is annoying me.
> 
> For diagnostic purposes, I was running a Cactus/Carpet executable (ETK Maxwell) with CarpetIOBasic::output_1Devery = 1. To my surprise, the output happens every *two* timesteps. When I switch the parameter to 2, the same thing happens. So I get the following behaviour:
> 
> parameter value  => actual output frequency
> -------------------------------------------------------------
> 1 => 2
> 2 => 2
> 4 => 4
> 8 => 8
> 
> The grid has multiple refinement levels. I tried a smaller testsuite (perhaps one of the ML_BSSN tests, which are unigrid), and there "output_1Devery = 1" really did produce output every timestep.
> 
> I know a proper report needs a sample parameter file for reproducibility, but before I get that (not logged into the right machine right now), perhaps someone could tell me why this -might- happen? The logic in the IOBasic thorn seems simple enough ...
> 
> Thanks, Bernard
> 
> ----------------------------------------------------------------------------- 
> Bernard Kelly -- CRESST Research Associate, NASA/GSFC
>   
> Phone: +1 (301) 286-7243
> E-Mail: bernard.j.kelly at nasa.gov
> Web: http://science.gsfc.nasa.gov/sed/index.cfm?fuseAction=people.jumpBio&iphonebookid=13052
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