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Altera_Forum's avatar
Altera_Forum
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10 years ago

Quartus Partition Post Fit preservation

Hello all,

Quartus preserve post fit of over 80% of my design but compilation time.. is like a new compilation from scratch.. (1:30h)

Info (171004): Fitter is performing a Standard Fit compilation using maximum Fitter effort to optimize design performance

Info (171122): Fitter is preserving placement for 83.83 percent of the design from 3 Post-Fit partition(s) and 0 imported partition(s) of 6 total partition(s)

There is something wrong with Quartus fitter in latest version (15.1)?

Thanks

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    I've seen similar behavior on few designs and different Quartus versions. Quartus uses disproportionate amount of time in the preservation and partition merging stages. It takes less time doing build from scratch than using partition (designs that take 30min - 2.5hrs to build)

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    Analysis & Synthesis take less time (2 min instead of 10 min)

    Partition Merge take 1-2 min

    Fitter take 1:09h

    Timequest 4:20min

    EDA Writer 1:35m

    Problem is fitter.. maybe can't fit using preserved partitions and refit-again? I don't use LogicLock.