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Technical ideas, implementations, and lessons learned.
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Latest note153 NOTES
2026-11-11 | TLX: make warp orchestration explicit in the program
- Inference Serving
Producer/consumer pipelines, TLX abstractions and the scope of Meta’s three production examples.
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November 202658 NOTES
Nov 11, 20262026-11-11 | LMCache and Phoenix: bring SSD-resident KV directly to the GPU
- Inference Serving
Nov 11, 20262026-11-11 | NVIDIA Snapshot: reuse initialized state for replica recovery
- Inference Serving
- Systems Reliability
Nov 11, 20262026-11-11 | Muse Spark Open on TPU: pipeline the step and preserve session state
- Inference Serving
Nov 11, 20262026-11-11 | LLDB across CPUs and GPUs: one session, separate address spaces
- Observability & Diagnosis
- Systems Reliability
Nov 11, 20262026-11-11 | GKE Dynamic Slicing: decouple TPU topology from node pools
- Systems Reliability
Nov 11, 20262026-11-11 | Agent Substrate: suspend sessions without dedicating warm workers
- Agent Reliability
- Inference Serving
- Systems Reliability
Nov 10, 20262026-11-10 | TPU Sync: asynchronous model-state movement across memory tiers
- Inference Serving
- Systems Reliability
Nov 10, 20262026-11-10 | Grafana Watchers: calibrate once, make one narrow decision per check
- Agent Reliability
- Observability & Diagnosis
- Anomaly Detection
Nov 10, 20262026-11-10 | GLM-5.3-Flash: separate state semantics and balance prefill with decode
- Inference Serving
- Systems Reliability
Nov 10, 20262026-11-10 | Claude Fable / Mythos 5.2: capability, inference cost, and access boundaries
- Agent Reliability
- Coding Agents
Nov 10, 20262026-11-10 | Evaluating AI SRE: separate diagnosis, evidence, and operational responsibility
- Agent Reliability
- Observability & Diagnosis
- Systems Reliability
Nov 9, 20262026-11-09 | nf12: Why Lossless Weight Compression Can Speed Up or Slow Down Serving
- Inference Serving
Nov 8, 20262026-11-08 | vLLM Stable ABI: decoupling engine upgrades from rebuilds
- Inference Serving
- Systems Reliability
Nov 8, 20262026-11-08 | Cache-aware model routing: switching has a state cost
- Agent Reliability
- Inference Serving
Nov 8, 20262026-11-08 | MaxxBench: testing adaptation when familiar requirements change
- Agent Reliability
- Coding Agents
Nov 8, 20262026-11-08 | FrontierCS 2: restoring the evaluator’s control of measurement
- Agent Reliability
- Coding Agents
- Systems Reliability
Nov 8, 20262026-11-08 | Prompt-cache misses: tracing costs to prefixes and API routes
- Observability & Diagnosis
- Inference Serving
Nov 8, 20262026-11-08 | FETCh: connecting formal specifications to production events
- Observability & Diagnosis
- Systems Reliability
Nov 8, 20262026-11-08 | Inference startup: what weight reuse, warm instances, and snapshots preserve
- Inference Serving
- Systems Reliability
Nov 8, 20262026-11-08 | Opus 5.5: reading the cost curve and the model actually serving a task
- Agent Reliability
- Coding Agents
- Inference Serving
Nov 7, 20262026-11-07 | Zero Mismatch: remove numerical drift before correcting policy lag
- Inference Serving
- Systems Reliability
Nov 7, 20262026-11-07 | XM-Sparse: sparse reads still need full-cache capacity and bandwidth
- Inference Serving
Nov 7, 20262026-11-07 | Reshard: transfer the shards RL inference actually needs
- Inference Serving
- Systems Reliability
Nov 7, 20262026-11-07 | Agent memory: separate capture, correction and retrieval
- Agent Reliability
- Self-Improvement
Nov 7, 20262026-11-07 | Bits Investigation: simpler loops and tool-side evidence processing
- Agent Reliability
- Observability & Diagnosis
Nov 6, 20262026-11-06 | Kinference: a control plane for caches, queues, and tenant policies
- Observability & Diagnosis
- Inference Serving
Nov 6, 20262026-11-06 | Sentry Agent Tracing: turning production traces into evaluation and triage inputs
- Agent Reliability
- Observability & Diagnosis
Nov 6, 20262026-11-06 | Radar on SREGym: connecting diagnosis and repair through structured context
- Agent Reliability
- Observability & Diagnosis
- Systems Reliability
Nov 6, 20262026-11-06 | ERNIE-5.5-Flash-Base: hybrid attention, ECHO, and serving boundaries
- Inference Serving
- Systems Reliability
Nov 5, 20262026-11-05 | JITEngine: different optimizations for the same model on different Macs
- Coding Agents
- Inference Serving
- Systems Reliability
Nov 5, 20262026-11-05 | NeMo: turning trace evidence into testable harness repairs
- Agent Reliability
- Self-Improvement
- Observability & Diagnosis
- Systems Reliability
Nov 5, 20262026-11-05 | NVIDIA cluster agents: cross-layer investigation with read-only access
- Multi-Agent Systems
- Observability & Diagnosis
- Systems Reliability
Nov 5, 20262026-11-05 | Model routing: establish a genuinely cheaper execution path
- Coding Agents
- Inference Serving
- Systems Reliability
Nov 5, 20262026-11-05 | Azure AFPD: prediction must connect to migration and repair
- Anomaly Detection
- Systems Reliability
Nov 5, 20262026-11-05 | Technical reading: Serving the agentic workload: Simon Mo on what AI agents change in vLLM
- Systems Reliability
Nov 5, 20262026-11-05 | Polymorphic Inference: Tuning for Changing Workloads
- Self-Improvement
- Inference Serving
Nov 4, 20262026-11-04 | NVIDIA Attribution: Traceable Diagnosis Across Cascading Failures
- Observability & Diagnosis
- Systems Reliability
Nov 4, 20262026-11-04 | Scaling NVIDIA TensorRT Performance Optimization Beyond a Single Build Route with the Global Performance Tuner, Part 1
- Agent Reliability
- Self-Improvement
- Observability & Diagnosis
- Inference Serving
- Systems Reliability
Nov 4, 20262026-11-04 | F3 Lightning: How Meta Accelerates Ads ML Features to Production at Scale
- Agent Reliability
- Self-Improvement
- Observability & Diagnosis
- Inference Serving
- Systems Reliability
Nov 4, 20262026-11-04 | Pika H3 Flex in FastVideo: 7x Faster, and Near Real Time in 4-bit
- Agent Reliability
- Self-Improvement
- Observability & Diagnosis
- Inference Serving
- Systems Reliability
Nov 4, 20262026-11-04 | open-flapping-airplanes: reproducing the flapping airplanes megakernel
- Agent Reliability
- Self-Improvement
- Observability & Diagnosis
- Inference Serving
- Systems Reliability
Nov 4, 20262026-11-04 | Progress on provable inference for large language models
- Agent Reliability
- Self-Improvement
- Observability & Diagnosis
- Inference Serving
- Systems Reliability
Nov 4, 20262026-11-04 | When Quantized KV Cache Quietly Sends Attention Back to the CPU
- Inference Serving
- Systems Reliability
Nov 4, 20262026-11-04 | Technical reading: Lessons from PD Labs: From experimentation to a production-ready SRE Agent
- Systems Reliability
Nov 4, 20262026-11-04 | Technical reading: AI Observability & Debugging Leaderboard: APEX-SWE | Mercor
- Systems Reliability
Nov 4, 20262026-11-04 | Technical reading: Kimi K3.1 Pro Tech Blog: Advancing Open Intelligence
- Systems Reliability
Nov 3, 20262026-11-03 | How Cloudflare Reduced DNS Build Work While Preserving Correctness
- Observability & Diagnosis
- Systems Reliability
Nov 3, 20262026-11-03 | HiCache Across Multi-Parallelism and Distributed Serving
- Agent Reliability
- Observability & Diagnosis
- Systems Reliability
Nov 3, 20262026-11-03 | Technical reading: Making Kubernetes AI-Ready for NVIDIA Vera Rubin on Day One
- Systems Reliability
Nov 2, 20262026-11-02 | agent-desktop: Identity and Retry Evidence for Desktop Actions
- Agent Reliability
- Observability & Diagnosis
- Systems Reliability
Nov 1, 20262026-11-01 | Using Agent Traces to Improve the Agent Itself
- Agent Reliability
- Coding Agents
- Observability & Diagnosis
- Systems Reliability
Nov 1, 20262026-11-01 | The Cross-Layer State Chain Behind Kubernetes API Timeouts
- Observability & Diagnosis
- Systems Reliability
Nov 1, 20262026-11-01 | GPUDirect Storage Diagnostics: Deterministic Checks and Agent Orchestration
- Observability & Diagnosis
- Inference Serving
- Systems Reliability
Nov 1, 20262026-11-01 | How the DeepSeek Prototype Manages Ongoing Work, Authority, and Recovery
- Agent Reliability
- Coding Agents
- Multi-Agent Systems
- Systems Reliability
Nov 1, 20262026-11-01 | Can Automated Red Teams Find Training-Data Monitoring Gaps?
- Agent Reliability
- Self-Improvement
- Observability & Diagnosis
- Systems Reliability
October 202691 NOTES
Oct 31, 20262026-10-31 | Using GPU Weights as the Parent for Delta Sync
- Inference Serving
- Systems Reliability
Oct 31, 20262026-10-31 | Radar: open-source Kubernetes UI with built-in MCP server for AI agents
- Agent Reliability
- Systems Reliability
Oct 31, 20262026-10-31 | ForgeKernel: Self-Evolving Kernels Catching and Surpassing Experts and Agents
- Agent Reliability
- Systems Reliability
Oct 31, 20262026-10-31 | Build a Validated Kubernetes Runtime for NVIDIA Dynamo
- Agent Reliability
- Systems Reliability
Oct 30, 20262026-10-30 | How vLLM supports sparse attention and cross-layer KV sharing
- Inference Serving
- Systems Reliability
Oct 30, 20262026-10-30 | Meta uses two test-generation paths to catch risky changes
- Coding Agents
- Systems Reliability
Oct 30, 20262026-10-30 | Google applies agent collaboration to distributed graphs and TPU kernels
- Multi-Agent Systems
- Systems Reliability
Oct 30, 20262026-10-30 | Technical reading: AI SRE: what is it, how could it change on-call – and does it work?
- Systems Reliability
Oct 30, 20262026-10-30 | Technical reading: How we detect frontier model misalignment
- Systems Reliability
Oct 29, 20262026-10-29 | PyTorch 2.15 Release Blog
- Agent Reliability
- Coding Agents
- Observability & Diagnosis
- Systems Reliability
Oct 29, 20262026-10-29 | Meta Andromeda: Powering the Next Generation of Ads Retrieval Through Model-System Co-Design
- Agent Reliability
- Coding Agents
- Observability & Diagnosis
- Systems Reliability
Oct 29, 20262026-10-29 | Training SWE agents with Miles on MI355X: taming long-tail trajectories and complex sandbox coordination
- Agent Reliability
- Coding Agents
- Observability & Diagnosis
- Systems Reliability
Oct 29, 20262026-10-29 | GKE networking dataplane for large agentic AI workloads
- Agent Reliability
- Coding Agents
- Observability & Diagnosis
- Systems Reliability
Oct 29, 20262026-10-29 | Behind the scenes, two months later: How we ship Google Agent Skills like products
- Agent Reliability
- Coding Agents
- Observability & Diagnosis
- Systems Reliability
Oct 29, 20262026-10-29 | Technical reading: Gemini 4 Carbon: our next frontier model
- Systems Reliability
Oct 29, 20262026-10-29 | Technical reading: The fastest, lowest-cost batch transcription with Qwen3-ASR
- Systems Reliability
Oct 28, 20262026-10-28 | SGLang: when is a terminated request’s KV memory reusable?
- Inference Serving
- Systems Reliability
Oct 28, 20262026-10-28 | miniTE: align numerics, learning, and complete RL cost
- Inference Serving
- Systems Reliability
Oct 28, 20262026-10-28 | A Lean tokenizer prototype: make token preservation explicit
- Agent Reliability
- Systems Reliability
Oct 28, 20262026-10-28 | A fleet-wide KV index: where a prefix lives changes its value
- Observability & Diagnosis
- Inference Serving
- Systems Reliability
Oct 28, 20262026-10-28 | Cloudflare’s KV exposure: why HTTP 200 missed a request-isolation failure
- Observability & Diagnosis
- Inference Serving
- Systems Reliability
Oct 27, 20262026-10-27 | Restore GPU Jobs While Faulty Nodes Are Repaired
- Observability & Diagnosis
- Systems Reliability
Oct 27, 20262026-10-27 | Bronto: Bound the Scope and Budget of an Alert Investigator
- Agent Reliability
- Observability & Diagnosis
Oct 25, 20262026-10-25 | vLLM at Rack Scale: CPU Costs After Wide Expert Parallelism
- Inference Serving
- Systems Reliability
Oct 25, 20262026-10-25 | SGLang and DeepInfer: Bounded Replay and a Complete Serving Stack
- Inference Serving
Oct 25, 20262026-10-25 | LAB: Designing for Behavior After Model Failover
- Agent Reliability
- Inference Serving
- Systems Reliability
Oct 25, 20262026-10-25 | Testing Kamaji and HAMi Tenant Scheduling Without GPUs
- Inference Serving
- Systems Reliability
Oct 25, 20262026-10-25 | An AI SRE Baseline: Better Context for the Agent You Have
- Coding Agents
- Observability & Diagnosis
- Systems Reliability
Oct 25, 20262026-10-25 | Reducing Agent Telemetry While Preserving Operational Answers
- Coding Agents
- Observability & Diagnosis
Oct 25, 20262026-10-25 | Agent Anomaly Detection: Asynchronous Auditing of Session Behavior
- Agent Reliability
- Observability & Diagnosis
- Anomaly Detection
Oct 24, 20262026-10-24 | MiniMax-M3.1-Flash: Low-Precision Cache Across the Serving Stack
- Inference Serving
- Systems Reliability
Oct 24, 20262026-10-24 | Why an Agent Kept Going: Resampling an Incident
- Agent Reliability
- Observability & Diagnosis
Oct 24, 20262026-10-24 | LiteLLM Release Incident: When Multiple Approvals Share One Trust Failure
- Agent Reliability
- Systems Reliability
Oct 24, 20262026-10-24 | Habitat: Balancing Multi-Tenant Isolation and Latency
- Observability & Diagnosis
- Systems Reliability
Oct 24, 20262026-10-24 | GLM-5.3 Long Context: Splitting Query Work and KV Capacity
- Inference Serving
- Systems Reliability
Oct 24, 20262026-10-24 | Agent Compute Engine: Designing for Waiting, Resumption, and Authorization
- Agent Reliability
- Systems Reliability
Oct 23, 20262026-10-23 | Turning Fuzz Tests into Proofs: Claude Scales Binary Verification
- Coding Agents
- Systems Reliability
Oct 23, 20262026-10-23 | TorchTitan: Shared Model Code Needs Shared Numerical Evidence
- Self-Improvement
- Inference Serving
- Systems Reliability
Oct 23, 20262026-10-23 | SGLang Trainium Beta: Separating RL Generation and Training Hardware
- Self-Improvement
- Inference Serving
- Systems Reliability
Oct 23, 20262026-10-23 | Minerva Connects AI-Cluster Telemetry to Job-Level Diagnosis
- Observability & Diagnosis
- Anomaly Detection
- Systems Reliability
Oct 23, 20262026-10-23 | METR Red Teaming: Monitoring Coverage Must Follow the Execution Chain
- Agent Reliability
- Coding Agents
- Observability & Diagnosis
Oct 23, 20262026-10-23 | Grafana AI: From Continuous Observation to Reviewable Patches
- Agent Reliability
- Coding Agents
- Observability & Diagnosis
Oct 23, 20262026-10-23 | FlyDSL in PyTorch: Hardware-Specific Kernels Join Backend Selection
- Inference Serving
- Systems Reliability
Oct 22, 20262026-10-22 | StartLux-Prism: Shared Decision Computation and Bitwise-Consistent Inference
- Inference Serving
- Systems Reliability
Oct 22, 20262026-10-22 | Flint on vLLM: lowering single-GPU long-context decode latency
- Inference Serving
Oct 21, 20262026-10-21 | London Cloud Outage: Failover Depends on Capacity and Control Paths
- Observability & Diagnosis
- Systems Reliability
Oct 21, 20262026-10-21 | Humming: Unifying Quantized Kernels Without Erasing Their Differences
- Inference Serving
Oct 21, 20262026-10-21 | Autoscaling Recovery: Measuring the Wait with MTSS
- Observability & Diagnosis
- Systems Reliability
Oct 21, 20262026-10-21 | vLLM TorchTPU: Reusing the Serving Control Plane
- Inference Serving
- Systems Reliability
Oct 21, 20262026-10-21 | TorchTPU: Compilation and Communication Behind Native PyTorch APIs
- Inference Serving
- Systems Reliability
Oct 21, 20262026-10-21 | Thin Orchestrator: Moving Domain Reasoning Out of the Router
- Agent Reliability
- Coding Agents
- Multi-Agent Systems
Oct 21, 20262026-10-21 | Prometheus: Making Large-Cluster Failures Recoverable
- Observability & Diagnosis
- Systems Reliability
Oct 21, 20262026-10-21 | LocalPay: Making Payment Failures Repeatable Locally
- Observability & Diagnosis
- Systems Reliability
Oct 20, 20262026-10-20 | Journey SLOs: measuring probe availability and real experience
- Observability & Diagnosis
- Systems Reliability
Oct 20, 20262026-10-20 | llm-d 1.0: coordinating cache locality, request priority, and upgrades
- Inference Serving
- Systems Reliability
Oct 20, 20262026-10-20 | Grafana Knowledge Graph: starting investigations from entity relationships
- Agent Reliability
- Observability & Diagnosis
Oct 20, 20262026-10-20 | Adaptive Telemetry: which evidence survives cost reduction
- Observability & Diagnosis
- Systems Reliability
Oct 20, 20262026-10-20 | LMCache 0.5.6: Trust and Lifecycle Boundaries in KV Cache Services
- Inference Serving
- Systems Reliability
Oct 20, 20262026-10-20 | Unattended Agents: Seven Failure Scenarios to Validate Before Release
- Agent Reliability
- Observability & Diagnosis
- Systems Reliability
Oct 20, 20262026-10-20 | Agent Skills: Does Following Instructions Actually Help?
- Agent Reliability
- Coding Agents
- Self-Improvement
Oct 20, 20262026-10-20 | TorchNeuron: Native PyTorch Integration and Its Compatibility Boundaries
- Observability & Diagnosis
- Inference Serving
- Systems Reliability
Oct 19, 20262026-10-19 | Jev Diagnosis: Evidence Defines the Limits of Inexpensive Judgments
- Agent Reliability
- Observability & Diagnosis
- Systems Reliability
Oct 19, 20262026-10-19 | Helion and CompileIQ: Adding Compiler Controls to Kernel Tuning
- Inference Serving
Oct 19, 20262026-10-19 | Elastic EP: Restricting Scaling Pauses to Topology Handover
- Inference Serving
- Systems Reliability
Oct 19, 20262026-10-19 | Cloudflare Review Agents: Checking Finding Quality After Cutting Costs
- Agent Reliability
- Coding Agents
- Inference Serving
Oct 16, 20262026-10-16 | Zephon: Preserving Training Batches When GPU Counts Change
- Systems Reliability
Oct 16, 20262026-10-16 | LMCache MP Coordinator: Finding Caches Across Servers
- Inference Serving
- Systems Reliability
Oct 16, 20262026-10-16 | Kimi K3 on MI355X: From State Reuse to Kernel Scheduling
- Inference Serving
- Systems Reliability
Oct 16, 20262026-10-16 | Specialized Kimi K3 Decode: Speed and Validation Boundaries
- Inference Serving
- Systems Reliability
Oct 15, 20262026-10-15 | Scout: Post-Training for Evidence-Based SRE Investigations
- Agent Reliability
- Observability & Diagnosis
Oct 14, 20262026-10-14 | Bitwise Training–Inference Consistency: Keep Low Precision, Fix the Computation Path
- Self-Improvement
- Inference Serving
Oct 14, 20262026-10-14 | NIXL Push: Move KV-Transfer Setup Off the First-Token Path
- Inference Serving
Oct 14, 20262026-10-14 | Claude Agent Observability: Bring Execution Into Existing OTel Systems
- Agent Reliability
- Observability & Diagnosis
Oct 13, 20262026-10-13 | Scion: How coding agents change source-control scaling
- Coding Agents
- Systems Reliability
Oct 12, 20262026-10-12 | Building an AI SRE: The Engineering Beyond an Answer
- Agent Reliability
- Observability & Diagnosis
Oct 12, 20262026-10-12 | Bidirectional KV Transfer in vLLM: Returning Multi-Turn Context to Prefill
- Inference Serving
Oct 9, 20262026-10-09 | vLLM and Vera Rubin: Turning Memory Locality into Serving Throughput
- Inference Serving
Oct 8, 20262026-10-08 | Dynamo: Scheduling Agent Inference and KV Cache by Session
- Observability & Diagnosis
- Inference Serving
Oct 8, 20262026-10-08 | Google AQuA: Finding Quality Issues in Production Traces
- Agent Reliability
- Observability & Diagnosis
Oct 8, 20262026-10-08 | Anyscale: Caching, Routing, and the Cost of Coding Agents
- Coding Agents
- Inference Serving
Oct 7, 20262026-10-07 | DeepSeek-V4.1-Flash: Replay and Kernel Optimizations Behind Fivefold Throughput
- Inference Serving
Oct 7, 20262026-10-07 | PAI: What Agent Monitoring Needs from Telemetry
- Agent Reliability
- Observability & Diagnosis
Oct 6, 20262026-10-06 | FBTriton: Organizing Embedding Training Around Sparse Access Patterns
- Systems Reliability
Oct 3, 20262026-10-03 | GPU Cluster Readiness: Validate the Workload, Not Only the Components
- Observability & Diagnosis
- Systems Reliability
Oct 1, 20262026-10-01 | Incident Replay: Can the Agent See Enough Evidence?
- Agent Reliability
- Observability & Diagnosis
Oct 1, 20262026-10-01 | TLX Jagged Flash Attention: Keeping Blackwell Busy on Variable-Length Sequences
- Inference Serving
Oct 1, 20262026-10-01 | KV Cache and LMCache: From Generation to Reusable Multi-Turn State
- Inference Serving