Forum Discussion

James_B's avatar
James_B
Icon for Contributor rankContributor
4 years ago
Solved

Quartus Fitter Random Failing

I have a design for Cyclone VE that is about 90% full, and if I recompile the same design several times in a row, the design will intermittently fail on routing. The router settings have been at Pe...
  • sstrell's avatar
    sstrell
    4 years ago

    Choosing the performance option runs the Fitter "harder" to get better results. Even with minor changes, you're changing the initial seed used by the Fitter so the results can be different (including not finding a valid fit).

sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
4 years ago

If you've got a fit that works, why are you recompiling? If you're trying to improve performance, easier thing to do would be to use the Design Space Explorer to automatically adjust seeds and compilation options to get the best results.