RISC-V Design · All levels
Performance Tuning and Signoff: Reports and Metrics
Reports and Metrics for Performance Tuning and Signoff.
Reports and metrics
Reports and Metrics 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.
Before/after trend
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.Root-cause tree
diagram
ROOT CAUSE TREE - Performance Tuning and Signoff
P95 and P99 workload latency, sustained throughput per subsystem, and power-performance target closure against signoff criteria. regressed
|
reproducible on fixed seed?
/ \
no yes
| |
env/tool drift first failing domain?
/ | \
decode execute memory/MMU
| | |
control map bypass/FU TLB/walk/perm
|
privilege/CSR side effects checked?
Stop at first confirmed mechanism, then assign explicit owner + fix proof.Track P95 and P99 workload latency, sustained throughput per subsystem, and power-performance target closure against signoff criteria. on representative workloads, not just microbenchmarks.
Include build/runtime/privilege metadata in report headers.
Pair performance movement with correctness and reliability checks.
Report tail stability, not only mean uplift.