[ET Trac] [Einstein Toolkit] #499: Prolongation fails with vectorisation enabled

[Einstein Toolkit]

#499: Prolongation fails with vectorisation enabled
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  Reporter:  hinder  |       Owner:  eschnett
      Type:  defect  |      Status:  new     
  Priority:  major   |   Milestone:          
 Component:  Carpet  |     Version:          
Resolution:          |    Keywords:          
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Comment (by eschnett):

 I looked at the vectorised code in Carpet's prolongation operator, and I
 see that all the vectorisation happens for reading, multiplying, and
 adding numbers. Storing the result into the target array is untouched and
 independent of vectorisation.

 According to the backtrace above, the actual error occurs while resizing a
 std::vector, probably while allocating communication buffers. It could be
 the system runs out of memory, or there is internal memory corruption.

 Since progress on this problem has stalled, I suggest to disable
 vectorisation in Carpet's prolongation operator. There is a statement "#if
 0" in line 226; changing this to "#if 1" should enable the scalar code and
 thus circumvent the vectorised code.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/499#comment:4>
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