[SCIP] HELP: Inquiry on Utilizing Multithreading in SCIP via Pyomo

[Zhang Zhiyu]

Dear SCIP,
I hope this message finds you well. I am currently working on solving a nonlinear programming (NLP) problem using Pyomo and SCIP, and I am seeking guidance on effectively utilizing multithreading to improve solve times.
Here is the setup I am using:

  *
Installed Pyomo version 6.8.0 and SCIP version 9.1.0 via conda.
  *
Created the solver in Pyomo using:
     *
solver = pyo.SolverFactory('scip')
  *
Set the multithreading option:
     *
solver.options['parallel/maxnthreads'] = 16

Despite setting the number of threads to 16, I have observed that the solve time does not seem to improve. I would greatly appreciate any insights or recommendations you might have for enabling efficient multithreading with SCIP in this context.

Thank you for your time and assistance.
Best regards,
Zhiyu Zhang
zhidaoxiayu_Biu at outlook.com

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