RISC-V Design · All levels
Pipeline Performance and CPI Decomposition: Design Space
Design Space for Pipeline Performance and CPI Decomposition.
Design space
Design Space for Pipeline Performance and CPI Decomposition is anchored on Measured CPI broken into ideal base CPI, structural stalls, data stalls, control stalls, and memory wait contributions.. 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 - Pipeline Performance and CPI Decomposition
Measured CPI broken into ideal base CPI, structural stalls, data stalls, control stalls, and memory wait contributions.
^
| 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.