RISC-V Design · All levels
MMU, TLB Hierarchy, and Hardware Page-Table Walk: Design Space
Design Space for MMU, TLB Hierarchy, and Hardware Page-Table Walk.
Design space
Design Space 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.
Trade latency and throughput against power and area.
Prefer architecture options with clear software contract impact.
Quantify extension-profile cost before enabling by default.
Keep bring-up and validation ownership explicit.
Trend lens
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.