[Ipopt-tickets] [Ipopt] #213: Repeatability of optimization runs with IPOPT

[Ipopt]

#213: Repeatability of optimization runs with IPOPT
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  Reporter:  florian.saupe  |      Owner:  stefan
      Type:  defect         |     Status:  assigned
  Priority:  normal         |  Component:  Ipopt
   Version:  3.11           |   Severity:  normal
Resolution:                 |   Keywords:  repeatability
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Comment (by kelman):

 Serial BLAS, as has been said. Sorry I didn't respond to your previous
 message. Changing linear solvers can definitely result in a different
 number of iterations. Always check the exit flag, if the solver exits
 because you told it to stop after a certain number of iterations, then it
 isn't done and you'll get a suboptimal result. The iteration limit that
 you had been setting with a better linear solver and threaded BLAS is
 probably too aggressive for the lower-performance configuration with Mumps
 and serial BLAS.

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Ticket URL: <https://projects.coin-or.org/Ipopt/ticket/213#comment:8>
Ipopt <http://projects.coin-or.org/Ipopt>
Interior-point optimizer for nonlinear programs.