Hi DN .
As we know that several factors will involved which cause difference in results.
BTW I dent get your changing topics on power grid ??
There are some default options which play a very imported role during placement and preplacement optimization.
I think that you are have explicitly specified (noTimingDriven) option in setPlaceMode.
Are you expecting default RC factor setting , if YES then below is the method to set it.
##### Set RC Factor #####
setRCFactor -defcap 1.000 -detcap 1.000 -res 1.000
FYI . suggestions from manual :
_ The following commands perform non-timing-driven placement:
_ The following commands disable scan chain reordering:
_ The following command disables the pre-placed buffer tree removal:
_ The following command enables the in-place optimization flow:
_ After the design is placed, the following command performs incremental placement, and
disables the pre-placed buffer tree removal:
Let me know if you need anything more.
Reg.Originally posted in cdnusers.org by mohanch007