Get positive slack using Design Compiler

[tony_taoyh]

design compiler worst slack

Hi,

Good day.

For the synthesis using Design compiler, is there any option
to let the synthesis get the positive slack?

For example, I want the worst slack to be +0.15 ns,
how to get it?

Please do not use "set_clock_uncertainty" command.

Thanks a lot.

 

[honeyxyb]

you can create clock with it's period less 0.15ns than actual period.

 

[tony_taoyh]

This is same as set_clock_ncertainty.

In Ambit, there is one option:
do_optimization -slack 0.15.

do_optimization = optimize in DC.


Thanks.

 

[haosg]

set_critical_range 0.15 will make compiler to cosider paths which slack is less 0.15
as critical path and do more optimization.