[ET Trac] [Einstein Toolkit] #1548: stdout redirection in multithreading scenario

[Einstein Toolkit]

#1548: stdout redirection in multithreading scenario
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  Reporter:  gzheng@…             |       Owner:                     
      Type:  defect               |      Status:  closed             
  Priority:  major                |   Milestone:                     
 Component:  Cactus               |     Version:  development version
Resolution:  fixed                |    Keywords:  stdout redirection 
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Changes (by rhaas):

  * status:  new => closed
  * resolution:  => fixed


Comment:

 I believe the bug reporter is confused about threads and processes. An MPI
 rank is the same as a process. It was always the case that all threads in
 a processes (or MPI rank) output to the same file. The usual fix to make
 output legible is to surround CCTK_Warn etc by an OMP CRITICAL section.

 We may want to consider including this in the flesh code for CCTK_Warn and
 CCTK_Info (should be fine since IO is slow so the extra serialization
 hopefully does not hurt).

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1548#comment:1>
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