Tom Spyrou
Tom Spyrou
@tdene and @QuantamHD at this time OpenSTA does not support PBA. As you mentioned it is an important feature to reduce pessimism in STA and is useful in both the...
@donn Tim had asked me to create improved CI to help avoid OpenLane needing to use a release branch but instead work from the head. This can be one step...
@mithro I think that for a flow like this to work there would have to be a layer on top of the circuit simulator which sets up stage based runs....
@shalan is this a hierarchical spef flow? If not it would be good to get the testcase so it can be fixed.
If its impossible to get the lef changes quickly a tcl script using opendb commands could be created to add this property after LEF is read.
@jjcherry56 can you look at this one?
This flow should be executed after detailed routing with the VT swapping occurring between cells with identical physical footprints. It can be done earlier in the flow but the critical...
The Net based approach is actually simpler. Its a loop. while there is a net with negative slack take the worst slack net and VT swap the net's driver until...
@QuantamHD this could work for final signoff timing, but would not work in optimization. We need an accurate and fast model for optimization that can be run in the context...
@QuantamHD yes, that is how it was done 20 years ago. Its very slow in runtime but workable when there are only a small number of violations.