Simulink and the DSP Blockset (DSP Blockset)

DSP Blockset

Increasing Performance

Simulation performance can become a concern in any model of sufficient complexity. In addition to model-specific adjustments, such as altering algorithms or eliminating scope displays, there are a number of general steps you can take to improve the performance of any model.

To begin with, you should familiarize yourself with "Improving Simulation Performance and Accuracy" in Chapter 4 of Using Simulink. Several additional options for improving performance are listed below:

Use frame-based processing wherever possible. It is advantageous for the entire model to be frame-based. See "Understanding Samples and Frames" earlier in this chapter for more information.
Turn off the Simulink status bar by deselecting the Status bar option in the View menu. Simulation speed will improve, but the time indicator will not be visible.
Run simulations from the MATLAB command line by typing

This can greatly increase the simulation speed. However, there are several limitations attached to this method of launching a simulation:

You cannot interact with the simulation (to tune parameters, for instance).
You must press Ctrl-C to stop the simulation.
There are no graphics updates in M-file S-functions.

Use the Real-Time Workshop to generate generic real-time (GRT) code targeted to your host platform, and simulate the model using the generated executable file. See the Real-Time Workshop User's Guide for more information.

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