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Course contents

  • How to Use This Course
  • AI-VLSI Metrics Reference
  • AI-VLSI Glossary
  • Reading Path
  • ML Math Foundations61
  • Neural Networks Basics61
  • Training Data Pipeline61
  • AI Compute Hardware61
    • CPU, GPU, TPU, NPU Landscape
      • CPU, GPU, TPU, NPU Landscape: Mechanism
      • CPU, GPU, TPU, NPU Landscape: Inputs & Outputs
      • CPU, GPU, TPU, NPU Landscape: Reports & Metrics
      • CPU, GPU, TPU, NPU Landscape: Debug Playbook
      • CPU, GPU, TPU, NPU Landscape: Worked Example
      • CPU, GPU, TPU, NPU Landscape: Pitfalls & Red Flags
      • CPU, GPU, TPU, NPU Landscape: Interview Drills
      • CPU, GPU, TPU, NPU Landscape: Review Checklist
      • CPU, GPU, TPU, NPU Landscape: Theory Deep Dive
      • CPU, GPU, TPU, NPU Landscape: Design Space
      • CPU, GPU, TPU, NPU Landscape: Expanded Case Study
      • CPU, GPU, TPU, NPU Landscape: Step-by-Step Walkthrough
      • CPU, GPU, TPU, NPU Landscape: Comparison Matrix
      • CPU, GPU, TPU, NPU Landscape: Software / Programmer View
      • CPU, GPU, TPU, NPU Landscape: Silicon PPA Impact
    • Memory Bandwidth & Roofline
    • Precision & Quantization
    • Inference vs Training Silicon
    • AI Compute Hardware: Tricky Q&A
  • Accelerator Architecture61
  • AI in VLSI Workflows61
  • Edge Deployment & MLOps61
  • AI-VLSI Interview Prep4
  • AI Basics for VLSI Engineers Cheatsheet
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‹CPU, GPU, TPU, NPU Landscape
  1. Topics
  2. AI for VLSI
  3. AI Compute Hardware
  4. CPU, GPU, TPU, NPU Landscape
  5. CPU, GPU, TPU, NPU Landscape: Theory Deep Dive

AI for VLSI · All levels

CPU, GPU, TPU, NPU Landscape: Theory Deep Dive

Theory Deep Dive for CPU, GPU, TPU, NPU Landscape.

On this page

    Foundational theory

    CPU, GPU, TPU, NPU Landscape anchors AI Compute Hardware. Different compute architectures optimize different operation mixes, memory behavior, and deployment constraints. Senior engineers connect model behavior to workload constraints, architecture implications, and ownership boundaries.

    Core concepts explained

    • Different compute architectures optimize different operation mixes, memory behavior, and deployment constraints.

    • Primary metric: perf-per-watt, throughput per dollar, and workload fit score

    • Primary artifact: platform comparison matrix, benchmark report, and workload mapping note

    • Owners: system architect, platform engineer, cost owner

    • Data, model, and hardware assumptions must be explicit

    • Evidence must map model behavior to engineering decisions

    Why this matters in product delivery

    At tapeout and product scale, CPU, GPU, TPU, NPU Landscape failures become expensive schedule and quality risks. Compute choices are constrained by memory and precision economics.

    Mental model

    Diagram
    COMPUTE LANDSCAPE
    
    CPU : control-heavy, flexible
    GPU : throughput, general matrix workloads
    TPU/NPU : specialized tensor pipelines
    
    Choose per workload + power + cost target.

    Worked intuition

    1. Name the engineering decision this model or mechanism supports.

    2. Open perf-per-watt, throughput per dollar, and workload fit score and identify the first weak signal.

    3. Check data quality, model assumptions, and compute mapping.

    4. Separate algorithm issue from runtime/hardware bottleneck.

    5. Collect platform comparison matrix, benchmark report, and workload mapping note with reproducible revision tags.

    6. Apply minimal change with bounded blast radius.

    7. Re-run validation and deployment readiness checks.

    Common misconceptions

    • Higher model complexity always means better product outcomes.

    • Benchmark wins directly imply EDA/silicon workflow value.

    • Quantization is free if average accuracy is unchanged.

    • One successful run is enough for production confidence.

    Visual reinforcement

    Platform fit matrix

    Diagram
    COMPUTE LANDSCAPE
    
    CPU : control-heavy, flexible
    GPU : throughput, general matrix workloads
    TPU/NPU : specialized tensor pipelines
    
    Choose per workload + power + cost target.

    Layer responsibilities

    Diagram
    AI-VLSI OWNERSHIP LAYERS — CPU, GPU, TPU, NPU Landscape
    
    layer                    owns                               typical failure
    ---------------------    --------------------------------   ----------------------------
    problem framing          metric + acceptance criteria       wrong objective target
    model + training         representation + optimization      unstable or biased model
    hardware mapping         dataflow + memory + precision      bandwidth stalls / mismatch
    deployment stack         runtime + firmware + drivers       latency jitter / incompatibility
    governance               monitoring + rollback + signoff    silent drift in production

    AI-VLSI deep dive

    Throughput claims are meaningless without roofline and bandwidth context.

    Concept diagram

    Diagram
    COMPUTE ANALYSIS
    
    workload profile -> roofline -> precision policy -> target silicon

    Metric graph

    Diagram
    EFFICIENCY DRIVERS
    
    compute utilization    ██████
    memory utilization     █████████
    precision efficiency   ███████

    Reports and artifacts

    • platform benchmark matrix

    • roofline chart

    • precision sweep

    • latency/power dashboard

    Mini case study

    Kernel optimization shifted from compute tuning to memory tiling after roofline analysis.

    Debug branches

    • Classify compute vs memory bound

    • Compare precision tiers

    • Align platform to SLA

    Senior review question

    Ask: what evidence connects this ML claim to a concrete VLSI workflow decision and owner signoff?

    Key takeaways

    • Every AI claim should map to a measurable engineering outcome.

    • Validate both model quality and hardware/runtime feasibility before adoption.

    Common pitfalls

    • Optimizing benchmark metrics that do not correlate with signoff goals.

    • Ignoring data drift and calibration after deployment.

    • Shipping ML workflows without clear rollback ownership.

    Execution drill pack 1

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 1
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 2

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 2
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 3

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 3
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 4

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 4
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 5

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 5
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 6

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 6
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 7

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 7
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 8

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 8
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 9

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 9
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 10

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 10
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 11

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 11
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 12

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 12
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Execution drill pack 13

    Use this pack to rehearse AI-for-VLSI decision making on ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive: metric framing, mechanism proof, hardware implications, and release safety.

    Evidence checklist

    • Metric context includes workload, dataset slice, and revision tags.

    • Mechanism explanation links model behavior to observed outcome.

    • Hardware/runtime feasibility is profiled, not assumed.

    • Owner and rollback path are documented before rollout.

    Review prompts

    1. Which decision will this model output influence?

    2. What is the first failing layer when metric regresses?

    3. Which owner applies the smallest reversible fix?

    4. What validation matrix is required before deployment?

    Evidence capsule

    Diagram
    AI-VLSI EVIDENCE CAPSULE 13
    
    PATH: ai-vlsi/ai-compute-hardware/cpu-gpu-tpu-npu-landscape/theory-deep-dive
    WORKLOAD SLICE: <name>
    PRIMARY METRIC: <value/trend>
    FIRST FAILING LAYER: <data/model/runtime/hardware>
    OWNER: <name>
    PRIMARY ARTIFACT: <report/profile/dashboard>
    DECISION: <ship / rollback / escalate>

    Theory reinforcement

    Compute choices are constrained by memory and precision economics.

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    See also

    • CPU, GPU, TPU, NPU Landscape: Mechanism
    • CPU, GPU, TPU, NPU Landscape: Inputs & Outputs
    • CPU, GPU, TPU, NPU Landscape: Reports & Metrics