[Ipopt-tickets] [Ipopt] #247: threads

[Ipopt]

#247: threads
---------------------+------------------------
  Reporter:  hager   |      Owner:  ipopt-team
      Type:  defect  |     Status:  new
  Priority:  normal  |  Component:  Ipopt
   Version:  3.11    |   Severity:  normal
Resolution:          |   Keywords:
---------------------+------------------------

Comment (by hager):

 Stefan,

 I had assumed IPOPT was using MA57 since I had downloaded the academic
 license
 package, but now I see that MA27 is default. When I changed
 "linear_solver" to
 MA57, I see that it is now using multiple cores. I see that it is using
 mostly 2 cores
 and occasionally 3 cores. How are the number of cores being controlled?
 When I write a code that uses the BLAS, it always goes up to the maximum
 of
 16 cores, so there must be something in the IPOPT software that is
 controlling
 the number of cores being used, I guess to try to optimize speed. I was
 curious
 where or how this is being done, is MA57 doing this? Thank you for your
 help.

 Best regards,

 Bill Hager

--
Ticket URL: <https://projects.coin-or.org/Ipopt/ticket/247#comment:3>
Ipopt <http://projects.coin-or.org/Ipopt>
Interior-point optimizer for nonlinear programs.