[ET Trac] [Einstein Toolkit] #362: Improve roundoff accuracy of efficient RK4

[Einstein Toolkit]

#362: Improve roundoff accuracy of efficient RK4
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  Reporter:  eschnett     |       Owner:        
      Type:  enhancement  |      Status:  closed
  Priority:  major        |   Milestone:        
 Component:  Cactus       |     Version:        
Resolution:  fixed        |    Keywords:        
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Comment (by eschnett):

 Yes, I used the exact ET thorn list, and ran all test cases.

 Here is the test case summary -- looks quite bad, actually, about 30% of
 our test cases fail:

   Summary for configuration sim-debug

     Time                     -> Fri Mar 25 21:32:09 EDT 2011
     Host                     -> erik-schnetters-macbook-pro.local
     User                     -> eschnett

     Total available tests    -> 173
     Unrunnable tests         -> 46
     Runnable tests           -> 127
     Total number of thorns   -> 162
     Number of tested thorns  -> 38
     Number of tests passed   -> 87
     Number passed only to
                set tolerance -> 43
     Number failed            -> 40

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/362#comment:8>
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