Simulink operations became slow

Hi, My simulink suddenly became very slow.Earlier simulink operations used to work very quickly.i have not done anything different.In the system all other activities are going normally except the operations in simulink.what could be the reason?

Answer 1

[Andreas Goser]

In most cases, this is related to solver steps beocming very small. Do you use a variable step solver?

[Amrutha]

Ya solver options:- type:Variable step size, solver:ode45.

[Andreas Goser]

OK, then the next step is to verify if the steps becoming very small is indeed the (first level) cause. Do you know how to find that out?

[Amrutha]

Sorry i didnt get you.where should i look for this settings?Can u elaborate?

Answer 2

[Andreas Goser]

There are plenty of tool to debug and profile Simulink models. There is a bit of dependency by release. The question now is whether your project/learning justifies familiarizing with all of this. My suggestion is (I use R2014b) to use the "step forward" button and follow the time steps taken, e.g. by watching the overall simulation time in the status bar.

[Amrutha]

Thank you Sir for the suggestion.i'm using R2008b .i will try to use R2014b.where do i find this "step forward" button ?

Answer 3

[Andreas Goser]

Amrutha, this was introduced in a recent release. But there are other ways. Point is: With this appoach, you will not be very quick in getting a solution. Look, 5 days are gone. I suggest that you look into the documentation and familiarize yourself with aspects of debugging and profiling.