[Ipopt] Problems with Pardiso solver in Ipopt

Rui Huang ruih at cmu.edu
Fri Dec 12 08:31:57 EST 2008

Hi Fabian

Many thanks for this.
The pardiso version I used is libpardiso_GFORTRAN42_INTEL64_P.so,
the compiler in the computer are 64-bit gcc 4.2.0, gfortran 4.2.0.



Fabian Wein wrote:
>> I compiled IPOPT with pardiso parallel version and tested it with a 
>> fairly large problem (100,000 variables) on Intel Quad core Linux machine.
>> It seems that the pardiso does not do the parallel computing even I 
>> specified the environmental parameter OMP_NUM_THREADS=4.
> Which compiler do you use?
>> The cpu usage was always around 25% no mater what value the parameter 
>> OMP_NUM_THREADS was (1,2,3,4).
> I like to see the threads with htop
> Fabian


Rui Huang
Chemical Engineering Department
Carnegie Mellon University
5000 Forbes Ave Pittsburgh PA 15213

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