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

[Ipopt]

#247: threads
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Reporter:  hager   |      Owner:  ipopt-team
    Type:  defect  |     Status:  new
Priority:  normal  |  Component:  Ipopt
 Version:  3.11    |   Severity:  normal
Keywords:          |
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 I setup ipopt on my linux dell workstation with 32 cores
 (Intel(R) Xeon(R) CPU E5-2687W v2 @ 3.40GHz) but notice
 that ipopt only uses 1 core when solving a large problem.
 I am using the GotoBLAS2. In doing the install, I used:

 configure --with-blas="/home/data/GotoBLAS2/libgoto2_nehalemp-r1.13.so
 -lgfortran -lgfortranbegin -lpthread" --with-
 lapack="/home/data/GotoBLAS2/libgoto2_nehalemp-r1.13.a"

 The configure program found the BLAS and said they worked and everything
 ended on a happy note. The make and make install also ran pleasantly.
 I used the code in Ipopt/examples/hs071_c for my template and I inserted
 "-lpthread" in the list of options for the CFLAGS. The make goes fine,
 but as the code runs for a big problem, it is only using one core when
 it should be using 16 cores.

 Do you have any suggestions for fixing this? Is there anything I can
 send to help track down the problem?
 Thank you.

 hager at ufl.edu

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