{"id":1164,"date":"2026-02-20T10:40:01","date_gmt":"2026-02-20T10:40:01","guid":{"rendered":"https:\/\/quantumopsschool.com\/blog\/chiplet-architecture\/"},"modified":"2026-02-20T10:40:01","modified_gmt":"2026-02-20T10:40:01","slug":"chiplet-architecture","status":"publish","type":"post","link":"https:\/\/quantumopsschool.com\/blog\/chiplet-architecture\/","title":{"rendered":"What is Chiplet architecture? Meaning, Examples, Use Cases, and How to Measure It?"},"content":{"rendered":"\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Quick Definition<\/h2>\n\n\n\n<p>Chiplet architecture is a modular semiconductor design approach that composes a system from smaller dice called chiplets, interconnected to behave like a single monolithic chip.<\/p>\n\n\n\n<p>Analogy: Think of a modern truck built from standardized trailer modules instead of a single welded frame \u2014 each trailer is optimized for a function and connected by a standardized hitch.<\/p>\n\n\n\n<p>Formal technical line: Chiplet architecture is the design and integration practice of partitioning SoC functionality into multiple die-level modules with high-bandwidth, low-latency interconnects and coordinated power, clock, and reliability management.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">What is Chiplet architecture?<\/h2>\n\n\n\n<p>What it is: A design methodology where a complex integrated circuit is realized by assembling multiple smaller dies (chiplets) within a package and providing high-speed interconnect and package-level services.<\/p>\n\n\n\n<p>What it is NOT: It is not simply multi-chip modules with legacy interposers, nor is it a software microservice architecture; chiplets require physical electrical and thermal integration and co-validation.<\/p>\n\n\n\n<p>Key properties and constraints:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Heterogeneous integration: different process nodes or IP blocks combined.<\/li>\n<li>Physical interfaces: SERDES, parallel buses, or standardized fabrics.<\/li>\n<li>Power and thermal coupling across chiplets.<\/li>\n<li>Signal integrity and latency constraints.<\/li>\n<li>Yield and supply chain trade-offs for smaller die sizes.<\/li>\n<li>Packaging overhead and interposer or substrate costs.<\/li>\n<\/ul>\n\n\n\n<p>Where it fits in modern cloud\/SRE workflows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hardware platform teams provide chiplet-based compute instances to cloud tenants.<\/li>\n<li>SREs manage firmware, driver stacks, and telemetry to monitor chiplet health.<\/li>\n<li>Observability pipelines must include package-level telemetry like per-die temperature and link errors.<\/li>\n<li>Incident response must span silicon vendors, board partners, OS, and cloud ops.<\/li>\n<\/ul>\n\n\n\n<p>Diagram description (text-only):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Picture a rectangular package with three distinct colored blocks inside labelled CPU chiplet, I\/O chiplet, and Accelerator chiplet. Thin lanes connect them carrying data, control, and power. Heat spreader sits on top. Package connects to board through BGA pads and power rails. External system sees a single socket device but firmware tracks per-chiplet health.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Chiplet architecture in one sentence<\/h3>\n\n\n\n<p>A modular semiconductor design that assembles specialized smaller dies into one package to optimize yield, cost, and function while requiring package-level integration and system-wide telemetry.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Chiplet architecture vs related terms (TABLE REQUIRED)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>ID<\/th>\n<th>Term<\/th>\n<th>How it differs from Chiplet architecture<\/th>\n<th>Common confusion<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T1<\/td>\n<td>3D-stacking<\/td>\n<td>3D-stacking places dies vertically with through-silicon vias whereas chiplets are often side-by-side on a substrate<\/td>\n<td>Confused as same because both reduce interconnect length<\/td>\n<\/tr>\n<tr>\n<td>T2<\/td>\n<td>MCM<\/td>\n<td>Multi-chip module integrates discrete chips on a substrate but lacks chiplet-level co-design and high-density interconnect<\/td>\n<td>People call every multi-die package a chiplet solution<\/td>\n<\/tr>\n<tr>\n<td>T3<\/td>\n<td>Monolithic SoC<\/td>\n<td>Single-die solution with uniform process node; chiplet breaks functions across dies<\/td>\n<td>Assumed inferior performance universally<\/td>\n<\/tr>\n<tr>\n<td>T4<\/td>\n<td>Interposer<\/td>\n<td>An interposer is a routing substrate; chiplet architecture includes die design beyond interposer<\/td>\n<td>Interposer often equated with chiplet<\/td>\n<\/tr>\n<tr>\n<td>T5<\/td>\n<td>Heterogeneous computing<\/td>\n<td>Heterogeneous computing is functional mix; chiplet is a physical integration approach<\/td>\n<td>Terms used interchangeably incorrectly<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Row Details (only if any cell says \u201cSee details below\u201d)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>(No row details required.)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Why does Chiplet architecture matter?<\/h2>\n\n\n\n<p>Business impact:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Revenue: Faster time-to-market for specialized products by reusing validated chiplets shortens product cycles.<\/li>\n<li>Trust: Modular upgrades reduce large-scale redesign risk; customers can trust incremental improvements.<\/li>\n<li>Risk: Supply chain becomes multi-vendor; integration defects can create hard-to-debug failures and warranty exposure.<\/li>\n<\/ul>\n\n\n\n<p>Engineering impact:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Incident reduction: Smaller die sizes reduce wafer-level defects per die but increase package integration failure modes.<\/li>\n<li>Velocity: Reuse of verified chiplets accelerates feature delivery and specialization.<\/li>\n<li>Complexity: Integration testing, package-level validation, and cross-team coordination increase.<\/li>\n<\/ul>\n\n\n\n<p>SRE framing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SLIs\/SLOs: Include metrics for inter-chiplet link error rates, per-die thermal headroom, and firmware handshake latency.<\/li>\n<li>Error budgets: Budget must account for both silicon-level and package-level rare faults.<\/li>\n<li>Toil: More automation is required for packaging tests, telemetry ingestion, and cross-supplier incident routing.<\/li>\n<li>On-call: Runbooks and escalating paths must include silicon vendors and board partners.<\/li>\n<\/ul>\n\n\n\n<p>What breaks in production \u2014 realistic examples:<\/p>\n\n\n\n<p>1) High-rate link flapping causing transient compute failures. Root cause: package signal integrity or power droop.\n2) One chiplet runs hot and throttles, reducing cluster throughput. Root cause: misrouted power plane or firmware calibration.\n3) Stuck firmware update on I\/O chiplet breaks node networking. Root cause: failed bootstrap or mismatch in firmware signature.\n4) Yield drift from a specific chiplet supplier causes supply shortage and fleet heterogeneity. Root cause: process yield regression.\n5) Silent data corruption across chiplet interconnect during corner voltage conditions. Root cause: insufficient ECC or error detection.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Where is Chiplet architecture used? (TABLE REQUIRED)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>ID<\/th>\n<th>Layer\/Area<\/th>\n<th>How Chiplet architecture appears<\/th>\n<th>Typical telemetry<\/th>\n<th>Common tools<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>L1<\/td>\n<td>Edge devices<\/td>\n<td>Small dies for MCU, wireless, and security co-packaged<\/td>\n<td>Per-die temp, link errors, boot status<\/td>\n<td>Device TPM, firmware updates<\/td>\n<\/tr>\n<tr>\n<td>L2<\/td>\n<td>Network hardware<\/td>\n<td>Line cards with separate ASIC and buffer chiplets<\/td>\n<td>SERDES errors, packet drops, per-port counters<\/td>\n<td>SNMP, Telemetry collectors<\/td>\n<\/tr>\n<tr>\n<td>L3<\/td>\n<td>Cloud servers<\/td>\n<td>CPU chiplet plus memory and accelerator chiplets<\/td>\n<td>Per-die temperature, memory bandwidth, link BER<\/td>\n<td>BMC, Redfish, Prometheus<\/td>\n<\/tr>\n<tr>\n<td>L4<\/td>\n<td>Accelerators<\/td>\n<td>GPU or AI accelerator chiplets combined with I\/O chiplets<\/td>\n<td>Utilization, thermal throttle, link drops<\/td>\n<td>Custom SDK telemetry, Prometheus<\/td>\n<\/tr>\n<tr>\n<td>L5<\/td>\n<td>Storage systems<\/td>\n<td>Controller chiplets plus NVMe domains<\/td>\n<td>I\/O latency, controller CPU errors, ECC events<\/td>\n<td>SMART, storage telemetry stacks<\/td>\n<\/tr>\n<tr>\n<td>L6<\/td>\n<td>Platform software<\/td>\n<td>Drivers and firmware managing chiplets<\/td>\n<td>Firmware version, reset counts, watchdogs<\/td>\n<td>Fleet management, CI<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Row Details (only if needed)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>(No row details required.)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">When should you use Chiplet architecture?<\/h2>\n\n\n\n<p>When it\u2019s necessary:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Process specialization yields large performance or power benefits.<\/li>\n<li>Supply\/yield constraints favor smaller die sizes.<\/li>\n<li>You need heterogeneous components that must be on a common package.<\/li>\n<\/ul>\n\n\n\n<p>When it\u2019s optional:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Moderate performance gains possible from modularity.<\/li>\n<li>When time-to-market benefits from IP reuse.<\/li>\n<\/ul>\n\n\n\n<p>When NOT to use \/ overuse it:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Simple designs with low volume where packaging costs dominate.<\/li>\n<li>Tightest-latency designs that cannot tolerate package-level interconnect latency.<\/li>\n<li>Early prototypes where integration risk must be minimized.<\/li>\n<\/ul>\n\n\n\n<p>Decision checklist:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If you need heterogeneous IP reuse and yield improvement -&gt; Consider chiplets.<\/li>\n<li>If packaging cost per device is higher than cost savings per die -&gt; Avoid chiplets.<\/li>\n<li>If software stack needs tight coherence and low latency -&gt; Evaluate monolithic SoC first.<\/li>\n<li>If multiple suppliers are needed for speed to market -&gt; chiplets advantageous.<\/li>\n<\/ul>\n\n\n\n<p>Maturity ladder:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Beginner: Use pre-validated commercial chiplets and off-the-shelf packages. Focus on power and firmware.<\/li>\n<li>Intermediate: Co-design interfaces and define package-level telemetry. Build CI for package validation.<\/li>\n<li>Advanced: Full system co-validation across hardware\/software, custom interposer, and global fleet telemetry and automated remediation.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">How does Chiplet architecture work?<\/h2>\n\n\n\n<p>Components and workflow:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chiplets: Function-specific dies (CPU, cache, I\/O, accelerator).<\/li>\n<li>Package substrate\/interposer: Provides routing, power, and sometimes optical or electrical fabrics.<\/li>\n<li>Interconnect: High-speed SERDES, parallel links, or standardized fabric for coherence.<\/li>\n<li>Power delivery: Shared rails and local regulators; dynamic voltage and frequency scaling across chiplets.<\/li>\n<li>Firmware and drivers: Boot orchestration, health reporting, and failover logic.<\/li>\n<li>Test and validation: Package-level stress, thermal profiling, and link margin testing.<\/li>\n<\/ul>\n\n\n\n<p>Data flow and lifecycle:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Boot: Primary chiplet initializes power and orchestrates boot for subordinate chiplets.<\/li>\n<li>Runtime: Data moves across interconnects with per-link flow control and error handling.<\/li>\n<li>Telemetry: Each chiplet exports health counters, temperature, voltage, and link stats to BMC\/OS agents.<\/li>\n<li>Maintenance: Firmware updates can be staged per-chiplet with rollbacks.<\/li>\n<li>End-of-life: Chiplet reuse may enable partial upgrades without full board replacement.<\/li>\n<\/ul>\n\n\n\n<p>Edge cases and failure modes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Non-symmetric failures across chiplets causing partial node degradation.<\/li>\n<li>Cross-talk causing intermittent errors under specific voltage or temperature conditions.<\/li>\n<li>Firmware or driver mismatches making a chiplet non-functional but electrically present.<\/li>\n<li>Supply chain variations causing performance or thermal differences across batches.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Typical architecture patterns for Chiplet architecture<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Disaggregated compute pattern: CPU and memory controller chiplets separated; use when memory scaling matters.<\/li>\n<li>Accelerator offload pattern: Small accelerator chiplets paired with general-purpose CPU chiplets; use for AI inference at scale.<\/li>\n<li>I\/O hub pattern: Centralized I\/O chiplet handles PCIe and networking; use when I\/O density changes often.<\/li>\n<li>Heterogeneous mix pattern: Mix of process nodes for logic and analog; use for power-sensitive edge devices.<\/li>\n<li>Redundant chiplet pair pattern: Duplicated critical functions across chiplets for N+1 resiliency; use in telecom or avionics.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Failure modes &amp; mitigation (TABLE REQUIRED)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>ID<\/th>\n<th>Failure mode<\/th>\n<th>Symptom<\/th>\n<th>Likely cause<\/th>\n<th>Mitigation<\/th>\n<th>Observability signal<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>F1<\/td>\n<td>Link flapping<\/td>\n<td>Intermittent packet loss<\/td>\n<td>Signal integrity or power noise<\/td>\n<td>Signal margin tuning and decoupling<\/td>\n<td>Link error count spike<\/td>\n<\/tr>\n<tr>\n<td>F2<\/td>\n<td>Thermal throttling<\/td>\n<td>CPU frequency drops<\/td>\n<td>Local hotspot or poor cooling<\/td>\n<td>Improve cooling and thermal throttling policies<\/td>\n<td>Per-die temp rise and freq drop<\/td>\n<\/tr>\n<tr>\n<td>F3<\/td>\n<td>Firmware mismatch<\/td>\n<td>Boot fails or degraded driver<\/td>\n<td>Version mismatch across chiplets<\/td>\n<td>Staged firmware validation and rollback<\/td>\n<td>Firmware version mismatch metric<\/td>\n<\/tr>\n<tr>\n<td>F4<\/td>\n<td>Silent data corruption<\/td>\n<td>CRC or checksum mismatch<\/td>\n<td>Insufficient ECC or link errors<\/td>\n<td>Add ECC and end-to-end checks<\/td>\n<td>CRC error counters<\/td>\n<\/tr>\n<tr>\n<td>F5<\/td>\n<td>Power rail droop<\/td>\n<td>Random resets<\/td>\n<td>PDN design flaw or transient load<\/td>\n<td>Redesign PDN and add local caps<\/td>\n<td>Reset counts and voltage sag telemetry<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Row Details (only if needed)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>(No row details required.)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Key Concepts, Keywords &amp; Terminology for Chiplet architecture<\/h2>\n\n\n\n<p>Provide a glossary of 40+ terms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2.5D \u2014 Package approach using an interposer to route between dies \u2014 Enables dense routing at cost \u2014 Pitfall: interposer cost.<\/li>\n<li>3D-IC \u2014 Vertical stacking of dies using TSVs \u2014 Higher density vertical interconnect \u2014 Pitfall: thermal dissipation.<\/li>\n<li>Interposer \u2014 Routing substrate between chiplets \u2014 Routes signals and power \u2014 Pitfall: brittle supply chain.<\/li>\n<li>BGA \u2014 Ball Grid Array packaging method \u2014 Standard board connection \u2014 Pitfall: rework difficulty.<\/li>\n<li>SERDES \u2014 Serializer\/Deserializer high-speed link \u2014 Allows high-bandwidth links \u2014 Pitfall: signal integrity tuning.<\/li>\n<li>TSV \u2014 Through-Silicon Via vertical electrical connection \u2014 Low-latency vertical links \u2014 Pitfall: manufacturing complexity.<\/li>\n<li>PDN \u2014 Power Delivery Network supplies power across package \u2014 Critical for stability \u2014 Pitfall: droop under burst loads.<\/li>\n<li>ECC \u2014 Error Correcting Code protects data across links \u2014 Reduces silent data corruption \u2014 Pitfall: latency and area overhead.<\/li>\n<li>BER \u2014 Bit Error Rate measurement of link reliability \u2014 Key quality indicator \u2014 Pitfall: noisy measurement at low rates.<\/li>\n<li>Coherence \u2014 Memory coherence across compute chiplets \u2014 Enables shared memory models \u2014 Pitfall: complex protocol overhead.<\/li>\n<li>Fabric \u2014 On-package communication layer \u2014 Provides routing abstraction \u2014 Pitfall: non-standard vendor fabric fragmentation.<\/li>\n<li>Interconnect latency \u2014 Time for data across chiplet link \u2014 Affects distributed cache and synchronization \u2014 Pitfall: underestimating in software.<\/li>\n<li>Heterogeneous integration \u2014 Mixing different process nodes or IP \u2014 Optimizes function per node \u2014 Pitfall: mismatched lifecycles.<\/li>\n<li>Yield \u2014 Percentage of good dies per wafer \u2014 Drives chiplet economics \u2014 Pitfall: ignoring packaging yield losses.<\/li>\n<li>Die-to-die (D2D) \u2014 Direct communication between chiplets \u2014 Low latency path \u2014 Pitfall: testing complexity.<\/li>\n<li>Inter-chiplet power gating \u2014 Fine-grained power control per chiplet \u2014 Saves power \u2014 Pitfall: wake latency.<\/li>\n<li>Heat spreader \u2014 Mechanical plate to distribute heat \u2014 Essential for thermal design \u2014 Pitfall: poor thermal interface material choice.<\/li>\n<li>BMC \u2014 Baseboard Management Controller for out-of-band telemetry \u2014 Vital for low-level health metrics \u2014 Pitfall: limited visibility into on-package links.<\/li>\n<li>Redfish \u2014 Standard for server management telemetry \u2014 Often used to expose chiplet telemetry \u2014 Pitfall: vendor extension fragmentation.<\/li>\n<li>DFM \u2014 Design for Manufacturability practices for chiplets \u2014 Reduces integration issues \u2014 Pitfall: additional design cycles.<\/li>\n<li>IP reuse \u2014 Reusing validated intellectual property across chiplets \u2014 Accelerates development \u2014 Pitfall: version compatibility.<\/li>\n<li>Package-level testing \u2014 Validation of assembled chiplets in package \u2014 Ensures system-level correctness \u2014 Pitfall: expensive test equipment.<\/li>\n<li>Interposer routing density \u2014 Availability of routing channels on interposer \u2014 Limits number of chiplets or lanes \u2014 Pitfall: routing congestion.<\/li>\n<li>Decapacitance \u2014 Local decoupling capacitors to stabilize PDN \u2014 Prevents voltage sag \u2014 Pitfall: PCB area limits.<\/li>\n<li>JTAG \u2014 Test access standard often for chip-level debug \u2014 Useful for per-chiplet debug \u2014 Pitfall: security if not protected.<\/li>\n<li>SerDes margining \u2014 Testing link headroom under stress \u2014 Ensures reliable operation \u2014 Pitfall: time-consuming.<\/li>\n<li>Bootloader orchestration \u2014 Sequence of initializing chiplets \u2014 Critical for startup \u2014 Pitfall: single point of failure.<\/li>\n<li>Failover \u2014 Ability of system to continue with degraded chiplets \u2014 Improves resilience \u2014 Pitfall: increased complexity.<\/li>\n<li>SKU fragmentation \u2014 Multiple package variants across fleet \u2014 Affects operations \u2014 Pitfall: inventory complexity.<\/li>\n<li>Thermal throttling \u2014 Automatic reduce-of-performance under heat \u2014 Protects hardware \u2014 Pitfall: sudden performance cliffs.<\/li>\n<li>Silicon debug \u2014 Low-level debugging of die behavior \u2014 Necessary for subtle failures \u2014 Pitfall: requires vendor access.<\/li>\n<li>Supply chain diversification \u2014 Using multiple suppliers for chiplets \u2014 Mitigates risk \u2014 Pitfall: cross-validation needs.<\/li>\n<li>Interleaving \u2014 Memory or traffic distribution across chiplets \u2014 Improves bandwidth \u2014 Pitfall: uneven latency.<\/li>\n<li>Link ECC offload \u2014 Hardware handles ECC for links \u2014 Lowers software complexity \u2014 Pitfall: opaque failure modes.<\/li>\n<li>Hotplug \u2014 Removing or replacing chiplets at runtime where supported \u2014 Useful for serviceability \u2014 Pitfall: rarely supported.<\/li>\n<li>Package telemetry \u2014 Aggregated signals from package exposed to system \u2014 Essential for SREs \u2014 Pitfall: limited telemetry fidelity.<\/li>\n<li>Link training \u2014 Negotiation phase for link speed and parameters \u2014 Ensures reliable operation \u2014 Pitfall: recovery on intermittent failures.<\/li>\n<li>Test vectors \u2014 Specific patterns used to validate interconnect \u2014 Used during bring-up \u2014 Pitfall: insufficient coverage.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">How to Measure Chiplet architecture (Metrics, SLIs, SLOs) (TABLE REQUIRED)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>ID<\/th>\n<th>Metric\/SLI<\/th>\n<th>What it tells you<\/th>\n<th>How to measure<\/th>\n<th>Starting target<\/th>\n<th>Gotchas<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M1<\/td>\n<td>Link error rate<\/td>\n<td>Reliability of inter-chiplet links<\/td>\n<td>Count of BER or CRC errors per hour<\/td>\n<td>&lt; 1e-9 BER equivalent<\/td>\n<td>Low-rate errors need long windows<\/td>\n<\/tr>\n<tr>\n<td>M2<\/td>\n<td>Per-die temperature<\/td>\n<td>Thermal headroom for each chiplet<\/td>\n<td>Sensor readouts polled per 10s<\/td>\n<td>Keep &lt; 85C under load<\/td>\n<td>Sensors can be delayed<\/td>\n<\/tr>\n<tr>\n<td>M3<\/td>\n<td>Chiplet boot success<\/td>\n<td>Boot orchestration health<\/td>\n<td>Percentage of successful boots<\/td>\n<td>99.9% per release<\/td>\n<td>Firmware mismatch skews metric<\/td>\n<\/tr>\n<tr>\n<td>M4<\/td>\n<td>Firmware update success<\/td>\n<td>Update reliability per chiplet<\/td>\n<td>Completed updates over attempts<\/td>\n<td>99.95%<\/td>\n<td>Partial updates create split states<\/td>\n<\/tr>\n<tr>\n<td>M5<\/td>\n<td>Throttle events<\/td>\n<td>Performance impact from thermal\/power<\/td>\n<td>Count throttle incidents per day<\/td>\n<td>&lt; 1 per 1000 nodes<\/td>\n<td>Short spikes may be hidden<\/td>\n<\/tr>\n<tr>\n<td>M6<\/td>\n<td>Reset counts<\/td>\n<td>Stability indication<\/td>\n<td>Count of unexpected resets<\/td>\n<td>&lt; 1 per month per node<\/td>\n<td>Normal maintenance resets must be excluded<\/td>\n<\/tr>\n<tr>\n<td>M7<\/td>\n<td>End-to-end latency<\/td>\n<td>Application impact from chiplet latency<\/td>\n<td>P95 or P99 of RPC latency<\/td>\n<td>P95 within SLA<\/td>\n<td>Co-mingled network latency confounds<\/td>\n<\/tr>\n<tr>\n<td>M8<\/td>\n<td>ECC corrects vs failures<\/td>\n<td>Data integrity across links<\/td>\n<td>Number of corrected vs uncorrectable events<\/td>\n<td>Corrected only with zero uncorrectable<\/td>\n<td>Corrected floods indicate marginal links<\/td>\n<\/tr>\n<tr>\n<td>M9<\/td>\n<td>Power variability<\/td>\n<td>PDN stability under load<\/td>\n<td>Voltage droop events count<\/td>\n<td>Minimal events during peak<\/td>\n<td>BMC resolution may be coarse<\/td>\n<\/tr>\n<tr>\n<td>M10<\/td>\n<td>Package-level telemetry coverage<\/td>\n<td>Visibility completeness<\/td>\n<td>Percentage of chiplets exposing telemetry<\/td>\n<td>100% ideally<\/td>\n<td>Some vendors expose limited metrics<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Row Details (only if needed)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>(No row details required.)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best tools to measure Chiplet architecture<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Tool \u2014 Prometheus<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What it measures for Chiplet architecture: Telemetry ingestion, time series storage, alerting for chiplet metrics.<\/li>\n<li>Best-fit environment: Kubernetes, cloud VMs, on-prem telemetry collectors.<\/li>\n<li>Setup outline:<\/li>\n<li>Instrument BMC and OS agents to expose metrics.<\/li>\n<li>Deploy exporters for firmware and package telemetry.<\/li>\n<li>Configure Prometheus scrape intervals and retention.<\/li>\n<li>Strengths:<\/li>\n<li>Flexible query language and alerting.<\/li>\n<li>Wide ecosystem of exporters.<\/li>\n<li>Limitations:<\/li>\n<li>High cardinality can blow storage.<\/li>\n<li>Not ideal for long-term raw waveform data.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Tool \u2014 Grafana<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What it measures for Chiplet architecture: Visualization dashboards for telemetry and alerts.<\/li>\n<li>Best-fit environment: Cloud dashboarding for SRE and hardware teams.<\/li>\n<li>Setup outline:<\/li>\n<li>Create dashboards for per-die telemetry.<\/li>\n<li>Configure role-based access.<\/li>\n<li>Add alerting channels and silences.<\/li>\n<li>Strengths:<\/li>\n<li>Rich panels, templating.<\/li>\n<li>Multiple data source support.<\/li>\n<li>Limitations:<\/li>\n<li>Complex query building for new telemetry.<\/li>\n<li>Notifications depend on external alert manager.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Tool \u2014 BMC\/Redfish agents<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What it measures for Chiplet architecture: Out-of-band hardware health including temps and resets.<\/li>\n<li>Best-fit environment: Bare-metal servers and on-prem racks.<\/li>\n<li>Setup outline:<\/li>\n<li>Expose chiplet telemetry via Redfish metrics extension.<\/li>\n<li>Poll from telemetry collectors.<\/li>\n<li>Map metrics into SLO dashboards.<\/li>\n<li>Strengths:<\/li>\n<li>Low-level access and power control.<\/li>\n<li>Limitations:<\/li>\n<li>Vendor extensions vary widely.<\/li>\n<li>Rate limits and permission issues.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Tool \u2014 Hardware lab test harnesses<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What it measures for Chiplet architecture: Signal integrity, link BER, thermal stress.<\/li>\n<li>Best-fit environment: Silicon bring-up labs and validation labs.<\/li>\n<li>Setup outline:<\/li>\n<li>Run margining tests and BER scans.<\/li>\n<li>Automate thermal cycling and power stress.<\/li>\n<li>Log raw outputs to centralized storage.<\/li>\n<li>Strengths:<\/li>\n<li>High-fidelity physical testing.<\/li>\n<li>Limitations:<\/li>\n<li>High cost and slow iteration.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Tool \u2014 Tracing and logs (Jaeger\/ELK)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What it measures for Chiplet architecture: Boot orchestration latencies and firmware steps.<\/li>\n<li>Best-fit environment: Driver and firmware validation in production-like environments.<\/li>\n<li>Setup outline:<\/li>\n<li>Instrument firmware events to logs and traces.<\/li>\n<li>Correlate with package telemetry.<\/li>\n<li>Build trace-based alerts on boot path timeouts.<\/li>\n<li>Strengths:<\/li>\n<li>Deep event correlation across stack.<\/li>\n<li>Limitations:<\/li>\n<li>Can be voluminous; needs sampling strategy.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Recommended dashboards &amp; alerts for Chiplet architecture<\/h3>\n\n\n\n<p>Executive dashboard:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Panels: Fleet health percentage, average per-die temperature, fleet boot success rate, incidents by category.<\/li>\n<li>Why: High-level trend visibility for leadership and procurement.<\/li>\n<\/ul>\n\n\n\n<p>On-call dashboard:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Panels: Node-level link error rate, per-die temperature with thresholds, recent resets, firmware mismatch alerts.<\/li>\n<li>Why: Rapid triage for incidents with actionable signals.<\/li>\n<\/ul>\n\n\n\n<p>Debug dashboard:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Panels: Raw BER curves, historical thermal traces, link margining results, firmware update logs, per-chiplet event timeline.<\/li>\n<li>Why: Deep dive and RCA during hardware or firmware incidents.<\/li>\n<\/ul>\n\n\n\n<p>Alerting guidance:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Page vs ticket:<\/li>\n<li>Page for high-severity events that cause service interruption: persistent link failure, node-wide boot failures, widespread thermal throttling.<\/li>\n<li>Ticket for degradations that do not violate SLOs: transient corrected ECC events, single-node thermal events.<\/li>\n<li>Burn-rate guidance:<\/li>\n<li>If error budget consumption exceeds 25% of monthly budget in a day, trigger cross-functional review.<\/li>\n<li>Noise reduction tactics:<\/li>\n<li>Dedupe related alerts by grouping by package serial number.<\/li>\n<li>Suppress transient alerts using short-term smoothing windows.<\/li>\n<li>Route vendor-specific alerts to vendor escalation channels automatically.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Implementation Guide (Step-by-step)<\/h2>\n\n\n\n<p>1) Prerequisites\n&#8211; Hardware design spec and package definition.\n&#8211; Clear telemetry contract between silicon vendor and ops.\n&#8211; Lab environment for physical tests.\n&#8211; CI infrastructure for firmware and driver validation.<\/p>\n\n\n\n<p>2) Instrumentation plan\n&#8211; Define metrics, sampling rates, and retention.\n&#8211; Decide telemetry sinks and exporters.\n&#8211; Add tracing points in firmware boot path.<\/p>\n\n\n\n<p>3) Data collection\n&#8211; Implement BMC\/Redfish collectors.\n&#8211; Stream lab results to central storage.\n&#8211; Enforce schema and labels for chiplet IDs.<\/p>\n\n\n\n<p>4) SLO design\n&#8211; Choose M1-M10 metrics as SLIs.\n&#8211; Set SLOs per-service and per-fleet bucket.\n&#8211; Define error budgets and burn policies.<\/p>\n\n\n\n<p>5) Dashboards\n&#8211; Build executive, on-call, and debug dashboards.\n&#8211; Add templated views per hardware SKU.<\/p>\n\n\n\n<p>6) Alerts &amp; routing\n&#8211; Map alerts to on-call rotations and vendor contacts.\n&#8211; Implement silences for maintenance windows.<\/p>\n\n\n\n<p>7) Runbooks &amp; automation\n&#8211; Create runbooks for common issues with steps and escalation.\n&#8211; Automate remediation where safe (e.g., power-cycle a failed chiplet via BMC).<\/p>\n\n\n\n<p>8) Validation (load\/chaos\/game days)\n&#8211; Run stress tests including thermal cycling and SERDES margin scans.\n&#8211; Run game days targeting chiplet-specific failure injections.<\/p>\n\n\n\n<p>9) Continuous improvement\n&#8211; Review incidents, update telemetry and runbooks.\n&#8211; Instrument new signals based on RCA.<\/p>\n\n\n\n<p>Pre-production checklist:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Telemetry contract signed and implemented.<\/li>\n<li>Lab tests cover margining and stress cases.<\/li>\n<li>Firmware update mechanism validated.<\/li>\n<li>Dashboards and alerts configured.<\/li>\n<\/ul>\n\n\n\n<p>Production readiness checklist:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SLOs and error budgets published.<\/li>\n<li>Vendor escalation paths documented.<\/li>\n<li>Automated remediation verified in staging.<\/li>\n<li>Inventory SKUs and firmware versions recorded.<\/li>\n<\/ul>\n\n\n\n<p>Incident checklist specific to Chiplet architecture:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Capture package serial and chiplet IDs.<\/li>\n<li>Pull per-die telemetry for last 24 hours.<\/li>\n<li>Check firmware versions and update history.<\/li>\n<li>If hardware suspected, engage vendor with lab reproducer data.<\/li>\n<li>Triage whether to page or ticket based on SLO impact.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Use Cases of Chiplet architecture<\/h2>\n\n\n\n<p>1) Hyperscale AI inference cluster\n&#8211; Context: Need high inference throughput with power efficiency.\n&#8211; Problem: Monolithic GPUs expensive and inflexible.\n&#8211; Why chiplet helps: Mix specialized tensor chiplets with cheaper I\/O chiplets.\n&#8211; What to measure: Accelerator utilization, thermal throttles, link BER.\n&#8211; Typical tools: Prometheus, BMC telemetry, custom SDK.<\/p>\n\n\n\n<p>2) Telco line card\n&#8211; Context: High port density, reliability requirement.\n&#8211; Problem: Monolithic ASIC redesign costly for incremental features.\n&#8211; Why chiplet helps: Swap I\/O chiplets without redoing compute logic.\n&#8211; What to measure: SERDES errors, packet drop rate, per-chiplet uptime.\n&#8211; Typical tools: SNMP, telemetry collectors.<\/p>\n\n\n\n<p>3) Secure edge device\n&#8211; Context: TPM and secure enclave required.\n&#8211; Problem: Integrating secure elements increases die complexity.\n&#8211; Why chiplet helps: Isolate secure enclave chiplet manufactured on specialized node.\n&#8211; What to measure: Boot attestation success, secure enclave resets.\n&#8211; Typical tools: Device-level attestation logs, BMC.<\/p>\n\n\n\n<p>4) Storage controller\n&#8211; Context: High IOPS and low latency.\n&#8211; Problem: Controller logic grows complex with more features.\n&#8211; Why chiplet helps: Offload parity and ECC to dedicated chiplets.\n&#8211; What to measure: I\/O latency, ECC correction counts.\n&#8211; Typical tools: SMART telemetry, storage metrics.<\/p>\n\n\n\n<p>5) Consumer SoC segmentation\n&#8211; Context: Multiple SKUs for market segments.\n&#8211; Problem: Need to produce many variants economically.\n&#8211; Why chiplet helps: Mix and match chiplets for SKUs.\n&#8211; What to measure: SKU fleet performance and failure rates.\n&#8211; Typical tools: Fleet telemetry and inventory systems.<\/p>\n\n\n\n<p>6) HPC node with disaggregated memory\n&#8211; Context: High memory bandwidth needs.\n&#8211; Problem: Monolithic memory controller limits scale.\n&#8211; Why chiplet helps: Separate memory controller chiplets scaling out.\n&#8211; What to measure: Memory bandwidth per chiplet, inter-chiplet latency.\n&#8211; Typical tools: PCIe or custom telemetry, Prometheus.<\/p>\n\n\n\n<p>7) Automotive ECU\n&#8211; Context: Safety and redundancy required.\n&#8211; Problem: Re-certification cost of monolithic redesigns.\n&#8211; Why chiplet helps: Redundant chiplet modules reduce scope of re-certification.\n&#8211; What to measure: Redundancy failover events, health counters.\n&#8211; Typical tools: Automotive-grade telemetry and logging.<\/p>\n\n\n\n<p>8) R&amp;D rapid prototyping\n&#8211; Context: Short iteration cycles for new features.\n&#8211; Problem: Full-reticle turn is expensive and slow.\n&#8211; Why chiplet helps: Swap experimental chiplets on known substrates.\n&#8211; What to measure: Functional correctness, link margins.\n&#8211; Typical tools: Lab harness, test vectors.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Scenario Examples (Realistic, End-to-End)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Scenario #1 \u2014 Kubernetes cluster with chiplet-based servers<\/h3>\n\n\n\n<p><strong>Context:<\/strong> Cloud provider runs Kubernetes on servers built with chiplet-based CPUs and accelerators.\n<strong>Goal:<\/strong> Ensure node reliability and predictable scheduling when chiplet thermal events occur.\n<strong>Why Chiplet architecture matters here:<\/strong> Chiplet nodes can degrade partially; kube-scheduler must avoid nodes with throttled chiplets.\n<strong>Architecture \/ workflow:<\/strong> Nodes expose per-chiplet telemetry via node-exporter to Prometheus; scheduler uses a custom node affinity score based on telemetry.\n<strong>Step-by-step implementation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Instrument per-die temp and throttle metrics at node-exporter.<\/li>\n<li>Add custom scheduler extender to reduce scores for nodes above threshold.<\/li>\n<li>Create alerts for sustained throttle events.\n<strong>What to measure:<\/strong> Number of pods evicted due to throttle, node-level SLO for pod availability.\n<strong>Tools to use and why:<\/strong> Prometheus for metrics, Grafana for dashboards, Kubernetes scheduler extender.\n<strong>Common pitfalls:<\/strong> High-frequency metric scraping increases overhead; missing labels cause poor scheduling.\n<strong>Validation:<\/strong> Run load tests inducing throttles; validate scheduler moves workloads within target windows.\n<strong>Outcome:<\/strong> Reduced user-visible latency and better pod placement during thermal events.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Scenario #2 \u2014 Serverless platform on managed PaaS with chiplet accelerators<\/h3>\n\n\n\n<p><strong>Context:<\/strong> Managed PaaS offering function acceleration using chiplet-based AI accelerators.\n<strong>Goal:<\/strong> Ensure cold-start and invocation latency within SLA while leveraging accelerators.\n<strong>Why Chiplet architecture matters here:<\/strong> Accelerator chiplets may have separate boot and firmware timelines.\n<strong>Architecture \/ workflow:<\/strong> Platform maintains accelerator pool with health states; functions scheduled only onto healthy pools.\n<strong>Step-by-step implementation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Track accelerator readiness state via BMC telemetry and expose to orchestrator.<\/li>\n<li>Gate scheduling on health and firmware consistency.<\/li>\n<li>Provide automated firmware staging windows for updates.\n<strong>What to measure:<\/strong> Accelerator boot success, invocation latency P95.\n<strong>Tools to use and why:<\/strong> Redfish\/BMC for health, Prometheus, and platform scheduler.\n<strong>Common pitfalls:<\/strong> Staggered firmware updates create mixed fleets causing inconsistent performance.\n<strong>Validation:<\/strong> Simulate large scale accelerator reboots and measure function latency.\n<strong>Outcome:<\/strong> Stable function latency and manageable maintenance windows.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Scenario #3 \u2014 Incident-response and postmortem for cross-chiplet silent corruption<\/h3>\n\n\n\n<p><strong>Context:<\/strong> Production storage nodes experience rare silent data corruption during peak I\/O.\n<strong>Goal:<\/strong> Identify root cause and implement mitigations.\n<strong>Why Chiplet architecture matters here:<\/strong> Data path spans controller chiplet and memory chiplet; errors may be link-level.\n<strong>Architecture \/ workflow:<\/strong> Correlate storage telemetry, ECC correction events, and link BER logs.\n<strong>Step-by-step implementation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aggregate corrected and uncorrected ECC counts and link CRCs.<\/li>\n<li>Reproduce in lab with stress vectors and thermal cycling.<\/li>\n<li>Patch firmware to add additional checksums end-to-end.\n<strong>What to measure:<\/strong> Rate of corrected and uncorrected ECC errors, application-level checksum mismatches.\n<strong>Tools to use and why:<\/strong> Storage telemetry, lab BER testers, firmware tracers.\n<strong>Common pitfalls:<\/strong> Insufficient telemetry granularity delayed RCA.\n<strong>Validation:<\/strong> Run long-duration stress tests with injected faults.\n<strong>Outcome:<\/strong> Fix applied and additional telemetry added to detect regressions earlier.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Scenario #4 \u2014 Cost vs performance trade-off for accelerator chiplet integration<\/h3>\n\n\n\n<p><strong>Context:<\/strong> Design team must choose between monolithic accelerator or chiplet plus I\/O in package.\n<strong>Goal:<\/strong> Optimize cost per inference while meeting latency SLA.\n<strong>Why Chiplet architecture matters here:<\/strong> Chiplets reduce per-die cost but add package and interconnect overhead.\n<strong>Architecture \/ workflow:<\/strong> Model TCO per unit and run benchmarks with prototype chiplet package.\n<strong>Step-by-step implementation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Obtain lab prototype and run workload benchmarks.<\/li>\n<li>Measure power, latency, and thermal behavior at scale.<\/li>\n<li>Calculate amortized package cost versus die yields.\n<strong>What to measure:<\/strong> Cost per inference, P95 latency, power per inference.\n<strong>Tools to use and why:<\/strong> Lab harness, Prometheus, financial models.\n<strong>Common pitfalls:<\/strong> Ignoring packaging lead times and test costs underestimates TCO.\n<strong>Validation:<\/strong> Prototype at pilot fleet scale and run customer workloads.\n<strong>Outcome:<\/strong> Decision informed by empirical data leading to chiplet choice with acceptable SLA.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Common Mistakes, Anti-patterns, and Troubleshooting<\/h2>\n\n\n\n<p>List of common mistakes with quick remedy:<\/p>\n\n\n\n<p>1) Symptom: Frequent link errors. Root cause: Poor signal margin. Fix: Re-run margining and adjust link rates.\n2) Symptom: Unexpected thermal throttling. Root cause: Inadequate cooling design. Fix: Improve heatsink or redistribute workload.\n3) Symptom: Firmware mismatch across chiplets. Root cause: Uncoordinated firmware updates. Fix: Implement staged rollouts and version gating.\n4) Symptom: High boot failure rate. Root cause: Boot orchestration single point of failure. Fix: Add redundant boot manager and heartbeat.\n5) Symptom: Silent data corruption. Root cause: Missing ECC or checksum. Fix: Add end-to-end checks and uncorrectable error alerts.\n6) Symptom: Spike in resets. Root cause: PDN transient droop. Fix: Add decoupling and local regulators.\n7) Symptom: No telemetry for some chiplets. Root cause: Vendor telemetry not implemented. Fix: Negotiate telemetry contract and firmware hooks.\n8) Symptom: Alert storm during maintenance. Root cause: Missing suppression rules. Fix: Use scheduled silences and grouping.\n9) Symptom: Excessive observability cost. Root cause: High cardinality metrics. Fix: Reduce label cardinality and sample less frequently.\n10) Symptom: Hard-to-reproduce lab issues. Root cause: Insufficient test vectors. Fix: Expand test coverage with targeted patterns.\n11) Symptom: Inconsistent fleet performance. Root cause: SKU fragmentation. Fix: Normalize firmware and hardware SKUs.\n12) Symptom: Slow incident RCA. Root cause: Missing correlation IDs across telemetry. Fix: Add package serial IDs and trace correlation.\n13) Symptom: High software latency attributed to chiplet. Root cause: Misattribution; network latency confounding. Fix: Isolate metrics and run microbenchmarks.\n14) Symptom: Vendor support delays. Root cause: No SLAs for silicon. Fix: Contractualize support windows and escalation.\n15) Symptom: Overly complex package routing. Root cause: Interposer routing congestion. Fix: Repartition chiplets or increase interposer complexity with cost tradeoffs.\n16) Symptom: Security vulnerability on-chiplet interface. Root cause: Unauthenticated links. Fix: Add link-level authentication and firmware validation.\n17) Symptom: Frequent hot-swap failures. Root cause: Lack of hotplug support. Fix: Disable hotplug or design for safe removal.\n18) Symptom: Observability blind spots. Root cause: Metrics lag and sampling window too long. Fix: Shorten critical metric sample intervals.\n19) Symptom: False positives for ECC alerts. Root cause: Normalized background correction spikes. Fix: Adjust thresholds and alert on trends.\n20) Symptom: Long deployment windows. Root cause: Coordinated firmware updates across vendors. Fix: Automate orchestration and use staged rollout.\n21) Symptom: Poor power efficiency. Root cause: Suboptimal power gating. Fix: Optimize power domain partitioning.\n22) Symptom: Difficulty simulating in software. Root cause: Lack of accurate emulator for chiplet behavior. Fix: Build hardware-in-loop tests.\n23) Symptom: Test environment drift. Root cause: Lab vs production mismatch. Fix: Maintain fleet-like conditions for validation.\n24) Symptom: Misaligned security responsibilities. Root cause: Multiple vendors without clear ownership. Fix: Define security boundaries and sign-off.<\/p>\n\n\n\n<p>Observability pitfalls (at least 5 included above):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Missing telemetry for certain chiplets.<\/li>\n<li>High cardinality metrics causing cost blowups.<\/li>\n<li>Lagging telemetry hiding transient events.<\/li>\n<li>Lack of correlation IDs across data sources.<\/li>\n<li>Alerts misconfigured leading to noise.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Best Practices &amp; Operating Model<\/h2>\n\n\n\n<p>Ownership and on-call:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ownership: Hardware platform team owns package-level telemetry and runbooks; firmware team owns boot and update logic; SRE owns SLOs and incident handling.<\/li>\n<li>On-call: Include firmware engineer and hardware representative in escalations for severe hardware-related incidents.<\/li>\n<\/ul>\n\n\n\n<p>Runbooks vs playbooks:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Runbook: Step-by-step operations for a known fault with commands and expected outcomes.<\/li>\n<li>Playbook: Strategy-level guidance for novel or complex incidents requiring cross-team coordination.<\/li>\n<\/ul>\n\n\n\n<p>Safe deployments:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use canary updates per rack or SKU subset.<\/li>\n<li>Stagger firmware updates by package serial ranges.<\/li>\n<li>Implement automatic rollback on threshold breach.<\/li>\n<\/ul>\n\n\n\n<p>Toil reduction and automation:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Automate telemetry ingestion, labeling by package serial number, and automated remediation steps like BMC-initiated soft resets.<\/li>\n<li>Use CI to validate firmware across chiplet combinations before fleet rollout.<\/li>\n<\/ul>\n\n\n\n<p>Security basics:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sign and verify firmware per-chiplet.<\/li>\n<li>Authenticate inter-chiplet links where possible.<\/li>\n<li>Protect telemetry endpoints and restrict BMC access.<\/li>\n<\/ul>\n\n\n\n<p>Weekly\/monthly routines:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Weekly: Review telemetry trends, recent alerts, and firmware health.<\/li>\n<li>Monthly: Run firmware regression tests and review test coverage for new failure modes.<\/li>\n<li>Quarterly: Supplier reviews and package-level stress tests.<\/li>\n<\/ul>\n\n\n\n<p>Postmortem review items related to Chiplet architecture:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Was telemetry sufficient to diagnose root cause?<\/li>\n<li>Were vendor escalation procedures effective?<\/li>\n<li>Did SLOs reflect hardware-induced user impact correctly?<\/li>\n<li>What automation could have reduced toil or prevented incident?<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Tooling &amp; Integration Map for Chiplet architecture (TABLE REQUIRED)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead>\n<tr>\n<th>ID<\/th>\n<th>Category<\/th>\n<th>What it does<\/th>\n<th>Key integrations<\/th>\n<th>Notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>I1<\/td>\n<td>Telemetry collector<\/td>\n<td>Gathers metrics from BMC and agents<\/td>\n<td>Prometheus, Redfish, Exporters<\/td>\n<td>Ensure schema and labels<\/td>\n<\/tr>\n<tr>\n<td>I2<\/td>\n<td>Dashboarding<\/td>\n<td>Visualizes telemetry and traces<\/td>\n<td>Prometheus, Elasticsearch<\/td>\n<td>Role-based views important<\/td>\n<\/tr>\n<tr>\n<td>I3<\/td>\n<td>Alerting<\/td>\n<td>Routes alerts to on-call and vendors<\/td>\n<td>PagerDuty, Email<\/td>\n<td>Support dedupe and grouping<\/td>\n<\/tr>\n<tr>\n<td>I4<\/td>\n<td>Lab test harness<\/td>\n<td>Runs BER and thermal tests<\/td>\n<td>Hardware test racks<\/td>\n<td>High-fidelity testing<\/td>\n<\/tr>\n<tr>\n<td>I5<\/td>\n<td>Firmware CI<\/td>\n<td>Validates firmware across chiplet combos<\/td>\n<td>GitLab CI, Jenkins<\/td>\n<td>Automate staged rollout<\/td>\n<\/tr>\n<tr>\n<td>I6<\/td>\n<td>Redfish\/BMC<\/td>\n<td>Exposes OOB hardware telemetry and control<\/td>\n<td>Prometheus, Fleet managers<\/td>\n<td>Vendor extensions vary<\/td>\n<\/tr>\n<tr>\n<td>I7<\/td>\n<td>Tracing<\/td>\n<td>Correlates firmware boot events<\/td>\n<td>Jaeger, OpenTelemetry<\/td>\n<td>Useful for boot orchestration issues<\/td>\n<\/tr>\n<tr>\n<td>I8<\/td>\n<td>Inventory system<\/td>\n<td>Tracks SKUs, serials, firmware<\/td>\n<td>CMDB, Asset DB<\/td>\n<td>Critical for incident triage<\/td>\n<\/tr>\n<tr>\n<td>I9<\/td>\n<td>Vendor portal<\/td>\n<td>Escalation and case tracking<\/td>\n<td>Ticketing systems<\/td>\n<td>Contractual SLAs needed<\/td>\n<\/tr>\n<tr>\n<td>I10<\/td>\n<td>Security attestation<\/td>\n<td>Verifies firmware authenticity<\/td>\n<td>TPM, Secure Boot<\/td>\n<td>Requires vendor support<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Row Details (only if needed)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>(No row details required.)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Frequently Asked Questions (FAQs)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">What is the difference between chiplet and MCM?<\/h3>\n\n\n\n<p>Chiplet emphasizes co-designed small dies with high-density interconnects; MCM is broader and may use simpler integration. The nuance is in co-design and interface standardization.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Are chiplets standardized?<\/h3>\n\n\n\n<p>Some standards exist, but much varies by vendor. Not publicly stated: universal standard adoption.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Do chiplets improve yield?<\/h3>\n\n\n\n<p>Often yes because smaller dies have higher yield, but package yield and integration issues can offset gains.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How does chiplet interconnect affect software latency?<\/h3>\n\n\n\n<p>Interconnect adds latency versus on-die wires; critical low-latency software paths must be benchmarked.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can chiplets be hot-swapped?<\/h3>\n\n\n\n<p>Rarely supported; hotplug is complex and usually not available for mainstream chiplet packages.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is chiplet architecture more secure?<\/h3>\n\n\n\n<p>It depends; isolated security chiplets can improve some threat models, but added interfaces increase attack surface.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How do you firmware-update a chiplet?<\/h3>\n\n\n\n<p>Via orchestrated staged updates using BMC or in-band mechanisms with version gating and rollback support.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What telemetry is essential?<\/h3>\n\n\n\n<p>Per-die temperature, link errors, firmware versions, and reset counts are minimal essentials.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to handle vendor heterogeneity?<\/h3>\n\n\n\n<p>Create telemetry contracts and CI validation matrices covering combinations.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How does chiplet affect cloud billing?<\/h3>\n\n\n\n<p>Performance variability may affect cost per work unit; monitor per-node throughput for pricing adjustments.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Are photonic interconnects used in chiplets?<\/h3>\n\n\n\n<p>Research and some experimental approaches exist; mainstream use varies \/ depends.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the biggest operational risk?<\/h3>\n\n\n\n<p>Lack of telemetry and slow vendor support for package-level issues.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is debugging harder with chiplets?<\/h3>\n\n\n\n<p>Yes; you often need lab-grade tools and vendor cooperation for low-level issues.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to simulate chiplet behavior?<\/h3>\n\n\n\n<p>Use hardware-in-loop and emulation; full simulation of physical interconnects is challenging.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Will chiplets reduce device cost?<\/h3>\n\n\n\n<p>They can, via yield and reuse, but packaging and testing costs may offset savings.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to design SLOs for chiplet-based hardware?<\/h3>\n\n\n\n<p>Pick measurable SLIs tied to user impact like availability and latency, and include hardware-specific metrics.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What are typical failure rates for inter-chiplet links?<\/h3>\n\n\n\n<p>Varies widely; monitor BER and set SLOs based on empirical data.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to mitigate thermal hotspots?<\/h3>\n\n\n\n<p>Better cooling, workload placement, and thermal-aware scheduling.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>Chiplet architecture is an important evolution in semiconductor design that enables modularity, specialization, and potentially faster product cycles. It introduces operational complexity that SREs and cloud architects must manage through telemetry, automation, and cross-vendor processes. Success requires clear telemetry contracts, staged deployments, and lab-grade validation.<\/p>\n\n\n\n<p>Next 7 days plan:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Day 1: Inventory existing hardware SKUs and their telemetry contracts.<\/li>\n<li>Day 2: Define minimal telemetry schema and sampling rates.<\/li>\n<li>Day 3: Deploy exporters and a Prometheus scrape job for package metrics.<\/li>\n<li>Day 4: Build initial executive and on-call dashboards.<\/li>\n<li>Day 5: Create runbooks for the top three chiplet failure modes.<\/li>\n<li>Day 6: Run a lab margining and thermal stress test for one SKU.<\/li>\n<li>Day 7: Schedule cross-functional review with vendor contacts to validate SLAs.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Appendix \u2014 Chiplet architecture Keyword Cluster (SEO)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Primary keywords<\/li>\n<li>Chiplet architecture<\/li>\n<li>chiplet design<\/li>\n<li>modular semiconductor<\/li>\n<li>die-to-die interconnect<\/li>\n<li>\n<p>package-level telemetry<\/p>\n<\/li>\n<li>\n<p>Secondary keywords<\/p>\n<\/li>\n<li>2.5D packaging<\/li>\n<li>interposer routing<\/li>\n<li>heterogeneous integration<\/li>\n<li>chiplet interconnect<\/li>\n<li>\n<p>chiplet firmware updates<\/p>\n<\/li>\n<li>\n<p>Long-tail questions<\/p>\n<\/li>\n<li>What is chiplet architecture in cloud servers<\/li>\n<li>How to monitor chiplet-based servers<\/li>\n<li>Chiplet vs monolithic SoC difference<\/li>\n<li>How to measure inter-chiplet link BER<\/li>\n<li>\n<p>Best practices for chiplet firmware rollout<\/p>\n<\/li>\n<li>\n<p>Related terminology<\/p>\n<\/li>\n<li>SERDES<\/li>\n<li>TSV<\/li>\n<li>PDN design<\/li>\n<li>ECC on links<\/li>\n<li>Redfish telemetry<\/li>\n<li>BMC metrics<\/li>\n<li>thermal throttling<\/li>\n<li>package yield<\/li>\n<li>inter-chiplet latency<\/li>\n<li>BER testing<\/li>\n<li>margining tests<\/li>\n<li>bootloader orchestration<\/li>\n<li>SKU fragmentation<\/li>\n<li>telemetry contract<\/li>\n<li>firmware CI<\/li>\n<li>hardware lab harness<\/li>\n<li>package-level testing<\/li>\n<li>decoupling capacitors<\/li>\n<li>link training<\/li>\n<li>secure enclave chiplet<\/li>\n<li>redundancy chiplets<\/li>\n<li>hotplug limitations<\/li>\n<li>supply chain diversification<\/li>\n<li>test vectors<\/li>\n<li>PCM and PMIC considerations<\/li>\n<li>heat spreader interface<\/li>\n<li>interposer cost<\/li>\n<li>vendor escalation<\/li>\n<li>attestation and TPM<\/li>\n<li>end-to-end checksums<\/li>\n<li>memory controller chiplet<\/li>\n<li>accelerator offload pattern<\/li>\n<li>Redfish telemetry extension<\/li>\n<li>manufacturer test patterns<\/li>\n<li>silicon debug access<\/li>\n<li>JTAG per-die<\/li>\n<li>inter-chiplet power gating<\/li>\n<li>package-level observability<\/li>\n<li>firmware rollback mechanisms<\/li>\n<li>packetized interconnect models<\/li>\n<li>package thermal design<\/li>\n<li>interposer routing density<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>&#8212;<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-1164","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Chiplet architecture? 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