RISC-V Design · All levels
MMU, TLB Hierarchy, and Hardware Page-Table Walk: Silicon PPA Impact
Silicon PPA Impact for MMU, TLB Hierarchy, and Hardware Page-Table Walk.
Silicon PPA impact
Silicon PPA Impact for MMU, TLB Hierarchy, and Hardware Page-Table Walk is anchored on TLB hit rate by level, average page-walk latency, and added cycles per memory access under representative workloads.. 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 - MMU, TLB Hierarchy, and Hardware Page-Table Walk
TLB hit rate by level, average page-walk latency, and added cycles per memory access under representative workloads.
^
| 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.