Step-by-step analysis walkthrough

Use when you own Interrupt Topology Contracts in a top-level integration review.

1. Open latest integration baseline and manifest.

2. Inspect failing metric by domain.

3. Trace first failing contract boundary.

4. Collect artifacts and assign single-thread owner.

5. Define minimal proof experiment.

6. Apply smallest reversible fix.

7. Run focused check then full regression.

8. Update dashboard and governance log.

9. Decide: close, waive with expiry, or escalate.

10. Publish final review memo.

Artifacts to collect

• interrupt topology diagram, latency trace, affinity policy sheet

• baseline manifest

• owner matrix

• regression summary

• risk memo

Decision memo template

SOC DECISION MEMO — Interrupt Topology Contracts
baseline:
metric:
root cause:
fix:
residual risk:
owners: firmware owner, platform architect, RTL owner

Reference visuals

Interrupt topology

INTERRUPT TOPOLOGY

peripherals -> local aggregators -> global controller -> CPU targets
                       |
                priority + affinity policy

SoC deep dive

Address, interrupt, and IO contracts are where hardware/software alignment is won or lost.

Concept diagram

HW/SW CONTRACT
address map + interrupt model + io defaults -> firmware behavior

Metric graph

BOOT REGRESSION SOURCES
map churn █████
reset defaults ████
driver mismatch ███

Reports and artifacts

• address decode audit

• interrupt latency report

• IO bring-up checklist

• boot contract review

Mini case study

A map alias issue caused sporadic peripheral misconfiguration despite clean block-level tests.

Debug branches

• Freeze address map baseline

• Audit reset defaults

• Validate firmware assumptions

Senior review question

Ask: what baseline, owner, and artifact prove this topic is truly closed?

Key takeaways

• State baseline manifest and owner with every closure metric.

• Run cross-domain regression after every top-level fix.

Common pitfalls

• Comparing results across different manifests.

• Unowned issues slipping through review cycles.

• Waiving risks without expiry and validation plan.

Principal SoC review addendum

Interrupt architecture defines aggregation, priority, routing, and affinity policies that software relies on for deterministic response.

Metric: interrupt latency tail, missed-interrupt incidents