Debug, Observability & Failure Triage

Section goal

Transaction logs, waveform debug, scoreboard mismatch analysis, and reproducible failure triage for VIP-heavy regressions.

This section trains how to reason from traffic behavior to VIP mechanism, then close with owner accountability, reliability gates, and release-safe decisions.

How to study this section

1. Start with each topic hub and draw the mechanism path.

2. Use reports and debug pages to prove causality before tuning.

3. Practice worked examples and interview drills with explicit evidence chains.

4. Close each topic with checklist and silicon impact pages.

Topics

1. transaction-logs/ - Transaction Logs and Structured Telemetry

2. protocol-waveform-debug/ - Protocol Waveform Debug and Cross-View Correlation

3. scoreboard-mismatch-root-cause/ - Scoreboard Mismatch Root-Cause Analysis

4. reproducible-failure-triage/ - Reproducible Failure Triage and Seed Discipline

Related topics

• Verification IP & Protocol Compliance course hub

VIP deep dive

Transaction logs, waveform debug, scoreboard mismatch analysis, and reproducible failure triage for VIP-heavy regressions.

Concept diagram

VIP SECTION - Debug, Observability & Failure Triage

testcase -> agents -> checkers -> coverage -> evidence

Metric graph

checker noise vs real violations trend

Reports and artifacts

• checker hit report

• coverage closure sheet

• compliance trace matrix

• regression health snapshot

Mini case study

A profile drift caused false checker storms until configuration hashes were locked in CI.

Debug branches

• Reproduce with locked seed and profile

• Isolate checker vs scoreboard vs DUT paths

• Map failure to spec clause and owner

Senior review question

Ask: which latency, bandwidth, and reliability evidence proves this VIP topic is closed under real traffic?