CPU Design Interview Prep

Whiteboard answer shape

1. Define workload context and failing metric.
2. Mark first stage loss in the CPU pipeline.
3. Explain mechanism and proving artifact.
4. Propose bounded fix with owner.
5. Define regression matrix and rollback gate.
6. Close with release recommendation.

Interview pages

1. cpu-whiteboard-framework/

2. scenario-branch-mispredict-storm/

3. scenario-cache-thrash/

4. scenario-core-count-vs-smt/

5. cpu-interview-qa-bank/

CPU deep dive

CPU closure requires architecture intent, reproducible PMU evidence, and explicit owner accountability.

Concept diagram

workload intent -> pipeline behavior -> measured bottleneck -> owner fix

Metric graph

IPC/CPI trend

Reports and artifacts

• CPI stack report

• counter correlation sheet

• regression dashboard

Mini case study

Pin environment metadata before comparing CPU performance captures.

Debug branches

• Reproduce and isolate before tuning

Senior review question

Ask: which CPI/latency evidence proves this topic is truly closed beyond synthetic benchmarks?