Timing violations after postRoute

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Ashokb431

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I am having Hold violations in my design after post route stage and my data path and clock path are completely optimized and i should not touch. how to fix these hold violations
 

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there is no such thing as free lunch. hold fixes usually incur penalties... very often delay cells are added to slow down hold-critical paths.

you can go back one stage and perform your post route opt with a higher hold margin.
you can also run a dedicated Hold Opt round. in Innovus, this is achieved with optDesign -postRoute -hold
 
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Still there exist certain hold mode violations after using the command optDesign -postRoute -hold.. What to do?
 

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