RISC-V Design · All levels
RISC-V Metrics Reference
Core metrics for architecture behavior, performance closure, and silicon readiness.
Core metric families
Frontend/decode: illegal decode rate, bubble share, control fanout delay.
Pipeline: CPI decomposition, forwarding hit ratio, stall classes.
Privilege/memory: trap latency, TLB misses, page-walk cost, fault tails.
Extensions: vector utilization, crypto throughput, fallback correctness.
Silicon: perf-per-watt, timing margin, thermal throttling, bring-up velocity.
diagram
BEFORE / AFTER TREND - RISC-V Closure
throughput / latency tail / perf-per-watt
^
| 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.