process of libMetric™ and Copernic™ in DTCO.ML™
libMetric™
Could you please share the optimization algorithm and process of libMetric™ and Copernic™ in DTCO.ML™ specifically in the physical design optimization part? For example, how to import PPA analysis for iteration?
LogicSynthPro | 2025-07-25 10:09:06💬 Comments section
Hi, LogicSynthPro,
That’s a great question! I’ve provided my answer below:
1. libMetric™ – Cell-Level PPA Modeling
libMetric™extracts timing, power, and area data from Liberty.libfiles.- It converts the data into structured JSON and uses lookup tables, interpolation, and least squares regression to build continuous models of PPA under varying conditions (e.g., different loads and transitions).
- These models are then used to drive higher-level analysis such as STA, power estimation, and area budgeting.
2. Copernic™ – Statistical and Yield-Aware Optimization
Copernic™creates large-scale virtual wafer datasets based on process variation models and pre-trained ML-based technology profiles.- It uses statistical methods (e.g., feature density, binning, distribution fitting) to evaluate design sensitivity and estimate yield impact from design/process variations.
- These metrics help identify which design or cell-level parameters most strongly affect PPA/yield under process corners.
Overall, if you wanna optimize your design with process-aware PPA analysis, you can follow this flow:
A. Extract PPA: Use libMetric™ to extract cell-level PPA models.
B. Design Analysis: Plug these models into RTL-to-GDS flow (logic synthesis, STA, power analysis).
C. Variation Simulation: Use Copernic™ to simulate yield and performance under variation.
D. Adjustment: Based on analysis results, adjust design margins, cell choices, timing constraints, etc.
E. Repeat until both PPA and yield targets are met.
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