Peter Holland asked 4 years ago
Koloman Varady Staff answered 4 years ago
Hi Peter,
Probably what is happening is that, as it is being passed into Stateflow, the matrix has to be copied over and, once the C code is generated, that is a nested for loop with 50 x 1000 iterations.
My first thought is to look at whether you need the whole matrix at once. If not, you can just pass bits of the trajectory at a time.
Another thing you can try is to transpose the matrix to be 1000x50. This will improve your TET immediately (thought it might not be enough of a gain). MATLAB is a column major language https://en.wikipedia.org/wiki/Row-_and_column-major_order and it will be faster to traverse a matrix by going down the columns rather than across rows.
An alternative is you can write your own C to do this, rather than rely on the generated C and include that file among those generated (that's a more complicated thing to do but quite possible).
You could also contact Mathworks support and see if they have any ideas.
Cheers,
Koloman
Please login or Register to submit your answer
