© 2021 Synopsys, Inc. 1
Transcript of © 2021 Synopsys, Inc. 1
Len Hsu
Synopsys Taiwan Co., Ltd.
Tweaker ECO/RedHawk-SC Integration
The Best Timing-Aware Dynamic IR ECO Flow
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Agenda
Tweaker ECO Introduction
Traditional IR ECO Flow
Tweaker IR ECO/RedHawk-SC Flow
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Tweaker: Industry’s Leading Physical-Aware ECO SystemFastest turnaround time down to 3nm
EC
O • Timing
• Metal
• Clock
• Power
• Robustness
• IR
Re
co
ve
ry
• Area
• Leakage power
• Dynamic power
• Clock surgery
• Robustness
• Dynamic voltage drop
An
aly
tics • Intelligent
diagnosis
• Optimized ECO recipes
• Violation analysis
• Last-mile PPA closure R
ob
ust
GU
I • View• Netlist• Slack• Physical• Path• Schematic
• Map• Density• Congestion• Timing• Violation• IR….
70% of the top 20 semiconductor companies use Tweaker ECO
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• Widening convergence gap between implementation and signoff
• Lack of physical-rules awareness
• Perception that it is too late to repair for Dynamic Voltage Drop, without hurting timing
Signoff Design Closure Challenges are Continuing to Grow
Advanced
Nodes
Increasing
Design Size
Complicated
Physical Rules
Steep Corner
Count Increase
Stringent PPA
Goals
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Traditional IR ECO Design Flow
ECO Route
ECO.apr.tcl
Pre-ECO IR DB
P&R
ECO.v + ECO.def
APR ECO Flow
Change List
IR What-if Flow
or
Tweaker
IR SignoffPrimeTime Signoff
ECO.defor
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Traditional IR ECO Tweaker Flow
.lib .lef.v .def
.sdf .spef
TWF Slack report
Load Design Data
Bind Placement/Routing
Build Timing Corners
IR ECO
Output Result .v .def .spef .tcl
Physical Info.
begin_corner bc_rcbest
set_group -lib -name bc
set_group -spef -name
rcbest
set_group -sdf bc_rcbest
slackin bc_rcbest.rpt.gz
twfin bc_rcbest.twf.gz
end_corner bc_rcbest
begin_corner wc_cworst
set_group -lib –name wc
set_group -spef –name
cworst
set_group –sdf wc_cworst
slackin wc_cworst.rpt.gz
twfin wc_cworst.twf.gz
irdropin ir_to_tweaker.rpt.gz
end_corner wc_cworst
M.M.M.C.
Placement
Blockage
Routing
FinFET Rule
.upf
IR
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• Update timing, power, and congestion concurrently and rapidly.
Comprehensive GUI Designed for IR Drop Manual ECO
Dynamic Power Map
Timing Map
Toggle Rate Map
Congestion Map in Physical View IR Map
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Timing Aware, Automated DvD ECO Flow with
Tweaker/RedHawk-SC
Dynamic Voltage Drop ECO
Tweaker RedHawk-SC
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State of the Art Last-Mile Superior Design ClosureIntegrating industry’s best ECO and IR analysis tools in an integrated solution
Tweaker ECO
Golden-Signoff-
Driven ECO Technology
RedHawk-SC
Gold Standard Voltage Drop
PRIMETIME DRIVENBacked by Industry’s most
Trusted Timing Signoff-
Driven ECO Solution
ECO domain-architected to
handle very high-capacity
designs
Physical-aware ECO
placement engine
Industry’s Trusted Gold
Standard Voltage Drop
Minimizes the number of
ECO changes needed to fix
DvD timing issues
Capture and measure the
causes of dynamic IR-drop
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Stat of the art Ansys and Synopsys collaboration to ensure convergent last-mile closure
Tweaker-Redhawk-SC Dynamic IR-ECO
ECO Route
ECO.apr.tcl
Pre-ECO IR DB
P&R
ECO.v + ECO.def
APR ECO flow
ECO.spef
IR what-if flow
or
Tweaker IR ECO
(IR Aggressor Analysis/ECO)
RedHawk-SC
Signoff
PrimeTime
Signoff
RedHawk-SC
Incremental IR Update
ECO.defor
What-if
analysis
Convergent
Last-Mile
Design
Closure
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Incremental Automated IR Drop Update Methodology
• Autofix ECO solution for aggressor/victim cells
– Swap, Flip, Sizing, Move
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• Summary: Reduced ECO count by 57%
• Improved more than 40% cells IR drop violation
• Fixed more 20% cells IR drop violation
Traditional vs. Tweaker/RedHawk-SC Dynamic IR Drop
Case 1: Worst IR Drop Improved by 21.37%
Traditional IR-ECO
IR D
rop
Ra
tio
New: Tweaker/RedHawk-SC DvD Flow
IR Target: 12%
IR D
rop
Ra
tio
PRE IR VIOS
POST IR VIOS
Post ECO Worst IR Drop Post ECO Worst IR Drop
EC
O C
oun
t
IR V
io. C
oun
t
• Design: 2.8M instance counts (6nm)
• Target threshold: 12%
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Summary: Superior Last-Mile Design Closure
It is not too late to repair dynamic IR without
hurting timing
Multiple customers have realized gains and deployed in production
Timing Aware, Automated Dynamic Voltage
Drop ECO Flow
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