biju4u90
Full Member level 3
In each stage of the PnR flow, should we try to fix all the violations
or can we proceed even if we have some violation? What is the criteria for
it? For example, when I go for floorplanning, should I make sure that the
initial netlist itself does not have any negative WNS? How much WNS and
TNS I can allow in the initial phase? Should I try to fix all the setup violations in the initial netlist before going to PnR? Or can I expect some of them to be fixed in the PnR stage? How much tolerance I can give to WNS or TNS or set up violations? What about in the successive steps
of physical design flow? Should I try to fix all the timing, congestion and
max transition, max cap violations before i move to placement,CTS,routing
etc.
or can we proceed even if we have some violation? What is the criteria for
it? For example, when I go for floorplanning, should I make sure that the
initial netlist itself does not have any negative WNS? How much WNS and
TNS I can allow in the initial phase? Should I try to fix all the setup violations in the initial netlist before going to PnR? Or can I expect some of them to be fixed in the PnR stage? How much tolerance I can give to WNS or TNS or set up violations? What about in the successive steps
of physical design flow? Should I try to fix all the timing, congestion and
max transition, max cap violations before i move to placement,CTS,routing
etc.