Reproducing identical SOF when recompiling with identical source

Having fixed seed value doesn’t mean that it will have same routing.

Having different seed value (AKA seed sweeping) is just retry compilation with different starting point. It might yield different timing result.

You may refer to timing user guide for more information ahout it:

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/an/an584.pdf