Specifying the number of processor cores to be used

If you work with a computer with more than one processor core, you can specify how many cores shall be used for certain calculations.

Notes: Currently Visum can perform the following calculations on several processor cores at the same time:

  • Incremental assignment (partly)
  • Equilibrium assignment (partly)
  • Equilibrium assignment LUCE
  • Equilibrium assignment Bi-conjugate Frank-Wolfe
  • Stochastic assignment
  • Dynamic stochastic assignment
  • Simulation-based dynamic assignment (SBA) (partly)
  • Timetable-based assignment
  • Headway-based assignment
  • Multimodal assignment
  • PrT skim matrix calculation
  • PuT operating Indicators
  • EVA weighting
  • EVA trip distribution and mode choice
  • Nested demand
  • OD pair filter evaluation of network volumes (PrT, PuT)
  • 4-step model for trip distribution
  • Tour-based model - Combined trip distribution / mode choice
  • Line blocking with vehicle interchange
  • Import and export of PuT connections
  • Matrix correction (TFlowFuzzy and Least squares) (partly)
  • Combination of matrices and vectors
  • Edit attribute
  • Intersect
  • HBEFA calculation (partly)
  • Export of path lists
  • Flow bundle (PrT, PuT)
  • Parts of the evaluation of formulas
  • ABM long-term location choices

The more processor cores you use, the faster the computation speed. However, rounding differences may occur - you can avoid these by using only one processor core.

1.  From the Edit menu, choose User preferences.

The User preferences window opens.

2.  In the navigator, select Working environment > General.

3.  In the CPU selection list, select the appropriate entry.

4.  Confirm with OK.

The settings are applied.

Note: If you want to execute the Equilibrium assignment LUCE procedure, the number of processor cores has to be defined with the procedure parameters. This parameter setting overrules the global settings (Parameters of Equilibrium assignment LUCE).