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Altera_Forum
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10 years ago

Reverse Timing analysis (from .pof file)

Hi, I'm working on a number of older systems which the original engineer somehow designed without using ANY timing constraints. These systems have been deployed for a number of years to several...
Altera_Forum's avatar
Altera_Forum
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10 years ago

To keep the results identical for release builds you should consider to limit the maximum Processors to one (i guess every future Computers will have at least one :-)).

set_global_assignment -name NUM_PARALLEL_PROCESSORS 1

My experience is, that the number of Processors used is like using a different seed. This results to different timings. A different seed or different cpu count may change fmax +-15%.

With above assignment i got same results even on different linux and windows machines (of course with same Quartus Version)