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Altera_Forum's avatar
Altera_Forum
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12 years ago

O3 Optimization features

Hi , I just wanted to know the impact of O3 optimization flag with the aoc compiler... The logic utilization seems to increase with O3. What are all the features of O3 ?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

-O3 sweeps various parameters to attempt to increase the work-items/s metric. It explores these parameters until there are diminising returns (like too large of a hardware footprint). When I use the -O3 flag I often take the final parameter set explored by the -O3 flag and use the same parameters for subsequent compiles into of repeatively using the -O3 flag.