RISC-V Design · All levels
Performance Tuning and Signoff: Silicon PPA Impact
Silicon PPA Impact for Performance Tuning and Signoff.
Silicon PPA impact
Silicon PPA Impact for Performance Tuning and Signoff is anchored on P95 and P99 workload latency, sustained throughput per subsystem, and power-performance target closure against signoff criteria.. Convert observations into mechanism-backed decisions with explicit ownership.
Frequency gains that increase bubbles may lose net throughput.
Area growth from extension logic must justify workload value.
Power and thermal stability are release gates, not secondary metrics.
PPA trend view
diagram
BEFORE / AFTER TREND - Performance Tuning and Signoff
P95 and P99 workload latency, sustained throughput per subsystem, and power-performance target closure against signoff criteria.
^
| o target band
| o after fix + reruns
| o
| o baseline (failing)
+--------------------------------------------------> iteration
capture issue isolate mechanism close + monitor
Use this view to confirm the gain is causal and stable across seeds.