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In my design (post route) i need to do some timing optimization eco.
mainly upsize some cells.
I will appriciate if you can write down the steps i need to do in order to do so.
I am guessing its: upsizing the cell, run incremental placement, run incremental routing? (what are the commands)
The flow is:
1. ecoChangeCell to resize the cell. This will automically run refinePlace to legalize the placement.
2. Run ecoRoute to perform incremental routing
Hope this helps,
In reply to wally1:
I have a problem similar to the OP. A fourth party signoff tool is reporting a few hundred SI victim nets that need a source drive strength boost .I can dbGet the driver instName and cell type easily enough with ...........................set netName <SI victim net> ; set inst [dbGet [dbGet -p [dbGet -p top.nets.name $netName].allTerms.isOutput 1].inst] ; Puts "Net: $netName, inst: [dbGet $inst.name], cell: [dbGet $inst.cell.name]" ;Unfortunately ecoChangeCell -inst <instname> -upsize is simply switching VT's to a faster cell and not necessarily increasing the overall drive strength. ( possibly to maintain same footprint??? )The simple but tedious solution would be to ecoChangeCell -inst <instname> -cell <masterCellName+nextDrive>.But I did not want to have to manually look up and enter a few hundred <masterCellName+nextDrive>. Does anyone know how to [dbGet $inst.cell.name+nextDrive] ?????ShawnNote: i find the following the fastest for a ton of ecoChangeCell instructions.............................setEcoMode -refinePlace falsesetEcoMode -updateTiming falsesetEcoMode -honorFixedStatus falsesetEcoMode -batchMode trueecoChangeCell -upsize -inst AB_sequencer_inst/AB_SEQUENCER_SW_REGS_inst/FE_OFCC318979_sequence_memory_943 ;setEcoMode -batchMode falsesetEcoMode -resetrefinePlace -wireLenOptEffort none -preserveRouting true -rmAffectedRouting falseaddFillerrouteDesign