AI Post Transformers

AI Post Transformers

By mcgrofTechnology
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AI Post Transformers episodes

  • DART Speeds Up Speculative LLM Decoding
    This episode explores the DART paper as a practical attempt to make speculative decoding deliver real end-to-end speedups for memory-bound LLM inference. It explains how exact draft-and-verify decoding works, why accepted chunk length only matters when the drafter is cheap enough, and how DART differs from Medusa and EAGLE by reusing target-model hidden states to predict several future tokens in parallel with a diffusion-inspired draft stage. The discussion focuses on DART’s mechanics, including multi-layer state reuse, masked future slots, N-gram-guided pruning, and a shifted-logit design that makes the first drafted token especially important because an early mistake invalidates the rest of the chunk. Listeners would find it interesting because it connects model architecture choices to real serving constraints like latency, batching, and GPU efficiency, showing where theoretical decoding gains do and do not survive in production.
    Sources:
    1. DART: Diffusion-Inspired Speculative Decoding for Fast LLM Inference — Fuliang Liu, Xue Li, Ketai Zhao, Yinxi Gao, Ziyan Zhou, Zhonghui Zhang, Zhibin Wang, Wanchun Dou, Sheng Zhong, Chen Tian, 2026
    http://arxiv.org/abs/2601.19278
    2. Unlocking Efficiency in Large Language Model Inference: A Comprehensive Survey of Speculative Decoding — Hemeng Xia, Zijian Wu, Chunxi Zhang, Yonggan Fu, Haoran Sun, Zhicong Liu, Ping Luo, 2024
    https://arxiv.org/abs/2401.07851
    3. Fast Inference from Transformers via Speculative Decoding — Yaniv Leviathan, Matan Kalman, Yossi Matias, 2023
    https://arxiv.org/abs/2211.17192
    4. EAGLE: Speculative Sampling Requires Rethinking Feature Uncertainty — Yuhui Li, Fangyun Wei, Chao Zhang, Hongyang Zhang, 2024
    https://arxiv.org/abs/2401.15077
    5. Speculative Diffusion Decoding: Accelerating Language Generation through Diffusion — Jacob K. Christopher, Brian R. Bartoldson, Tal Ben-Nun, Michael Cardei, Bhavya Kailkhura, Ferdinando Fioretto, 2024
    https://arxiv.org/abs/2408.05636
    6. EAGLE-3: Scaling up Inference Acceleration of Large Language Models via Training-Time Test — Yuhui Li, Fangyun Wei, Chao Zhang, Hongyang Zhang, 2025
    https://scholar.google.com/scholar?q=EAGLE-3%3A+Scaling+up+Inference+Acceleration+of+Large+Language+Models+via+Training-Time+Test
    7. Medusa: Simple LLM Inference Acceleration Framework with Multiple Decoding Heads — Tianle Cai, Yuhong Li, Zhengyang Geng, Hongwu Peng, Jason D. Lee, Deming Chen, Tri Dao, 2024
    https://scholar.google.com/scholar?q=Medusa%3A+Simple+LLM+Inference+Acceleration+Framework+with+Multiple+Decoding+Heads
    8. DiffuSpec: Unlocking Diffusion Language Models for Speculative Decoding — Guanghao Li, Zhihui Fu, Min Fang, Qibin Zhao, Ming Tang, Chun Yuan, Jun Wang, 2025
    https://scholar.google.com/scholar?q=DiffuSpec%3A+Unlocking+Diffusion+Language+Models+for+Speculative+Decoding
    9. SpecDiff-2: Scaling Diffusion Drafter Alignment For Faster Speculative Decoding — Jameson Sandler, Jacob K. Christopher, Thomas Hartvigsen, Nando Fioretto, 2025
    https://scholar.google.com/scholar?q=SpecDiff-2%3A+Scaling+Diffusion+Drafter+Alignment+For+Faster+Speculative+Decoding
    10. Speculative Decoding: Performance or Illusion? — Xiaoxuan Liu, Jiaxiang Yu, Jongseok Park, Ion Stoica, Alvin Cheung, 2026
    https://scholar.google.com/scholar?q=Speculative+Decoding%3A+Performance+or+Illusion%3F
    11. AI Post Transformers: Speculative Decoding in Real vLLM Serving — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-04-speculative-decoding-in-real-vllm-servin-6f4e2b.mp3
    12. AI Post Transformers: Deep Kernel Fusion for Transformer Decoding — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-15-deep-kernel-fusion-for-transformer-decod-b1a703.mp3
    13. AI Post Transformers: InfiniGen for Efficient Long-Context LLM Inference — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-18-infinigen-for-efficient-long-context-llm-143d77.mp3
    14. AI Post Transformers: Batch-Aware Expert Routing for Faster MoE Decoding — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-04-batch-aware-expert-routing-for-faster-mo-683ab6.mp3
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  • SALCA for Sparse Long-Context Decoding
    This episode explores why long-context LLM decoding becomes memory-bandwidth bound: once prompt prefill is done, each new token must repeatedly scan an ever-growing KV cache, making inference limited more by data movement than raw compute. It explains sparse attention as the idea that only a small fraction of prior tokens matter for each step, and uses top-k recall to frame the core challenge of preserving the right token ranking while cutting memory traffic. The discussion centers on Salca’s main argument: a sparsity-aware accelerator can make sparse decoding practical by combining dominant-channel feature selection with asymmetric ultra-low-bit query/key prediction, reducing predictor traffic to roughly one-eighth of a standard 4-bit filtering baseline. A listener would find it interesting because it connects transformer inference theory, serving-system bottlenecks, and custom chip design into a concrete case for faster, more energy-efficient long-context generation.
    Sources:
    1. SALCA for Sparse Long-Context Decoding
    https://arxiv.org/pdf/2604.24820
    2. Fast Transformer Decoding: One Write-Head is All You Need — Noam Shazeer, 2019
    https://scholar.google.com/scholar?q=Fast+Transformer+Decoding%3A+One+Write-Head+is+All+You+Need
    3. Efficiently Scaling Transformer Inference — Reiner Pope, Sholto Douglas, Aakanksha Chowdhery, Jacob Devlin, James Bradbury, Jeff Dean, et al., 2022
    https://scholar.google.com/scholar?q=Efficiently+Scaling+Transformer+Inference
    4. Efficient Memory Management for Large Language Model Serving with PagedAttention — Woosuk Kwon, Zhuohan Li, Siyuan Zhuang, Ying Sheng, Lianmin Zheng, Joseph E. Gonzalez, Hao Zhang, Ion Stoica, 2023
    https://scholar.google.com/scholar?q=Efficient+Memory+Management+for+Large+Language+Model+Serving+with+PagedAttention
    5. QUEST: Query-Aware Sparsity for Efficient Long-Context LLM Inference — Jiaming Tang, Yilong Zhao, Kan Zhu, Guangxuan Xiao, Baris Kasikci, Song Han, 2024
    https://scholar.google.com/scholar?q=QUEST%3A+Query-Aware+Sparsity+for+Efficient+Long-Context+LLM+Inference
    6. SpAtten: Efficient Sparse Attention Architecture with Cascade Token and Head Pruning — Hanrui Wang, Zhekai Zhang, Song Han, 2020
    https://scholar.google.com/scholar?q=SpAtten%3A+Efficient+Sparse+Attention+Architecture+with+Cascade+Token+and+Head+Pruning
    7. Energon: Towards Efficient Acceleration of Transformers Using Dynamic Sparse Attention — Zhe Zhou, Junlin Liu, Zhenyu Gu, Guangyu Sun, 2021
    https://scholar.google.com/scholar?q=Energon%3A+Towards+Efficient+Acceleration+of+Transformers+Using+Dynamic+Sparse+Attention
    8. S2-Attention: Hardware-Aware Context Sharding Among Attention Heads — Xihui Lin, Yunan Zhang, Suyu Ge, Liliang Ren, Barun Patra, Vishrav Chaudhary, Hao Peng, Xia Song, 2024
    https://scholar.google.com/scholar?q=S2-Attention%3A+Hardware-Aware+Context+Sharding+Among+Attention+Heads
    9. SnapMLA: Efficient Long-Context MLA Decoding via Hardware-Aware FP8 Quantized Pipelining — Yifan Zhang, Zunhai Su, Shuhao Hu, Rui Yang, Wei Wu, Yulei Qian, Yuchen Xie, Xunliang Cai, 2026
    https://scholar.google.com/scholar?q=SnapMLA%3A+Efficient+Long-Context+MLA+Decoding+via+Hardware-Aware+FP8+Quantized+Pipelining
    10. ParisKV: Fast and Drift-Robust KV-Cache Retrieval for Long-Context LLMs (https://arxiv.org/abs/2602.07721) — Yanlin Qi et al., 2026
    https://scholar.google.com/scholar?q=ParisKV%3A+Fast+and+Drift-Robust+KV-Cache+Retrieval+for+Long-Context+LLMs+%28https%3A%2F%2Farxiv.org%2Fabs%2F2602.07721%29
    11. LouisKV: Efficient KV Cache Retrieval for Long Input-Output Sequences (https://arxiv.org/abs/2510.11292) — Wenbo Wu et al., 2025
    https://scholar.google.com/scholar?q=LouisKV%3A+Efficient+KV+Cache+Retrieval+for+Long+Input-Output+Sequences+%28https%3A%2F%2Farxiv.org%2Fabs%2F2510.11292%29
    12. Efficient Low Rank Attention for Long-Context Inference in Large Language Models (https://arxiv.org/abs/2510.23649) — Tenghui Li et al., 2025
    https://scholar.google.com/scholar?q=Efficient+Low+Rank+Attention+for+Long-Context+Inference+in+Large+Language+Models+%28https%3A%2F%2Farxiv.org%2Fabs%2F2510.23649%29
    13. LLMs Know What to Drop: Self-Attention Guided KV Cache Eviction for Efficient Long-Context Inference (https://arxiv.org/abs/2503.08879) — Guangtao Wang et al., 2025
    https://scholar.google.com/scholar?q=LLMs+Know+What+to+Drop%3A+Self-Attention+Guided+KV+Cache+Eviction+for+Efficient+Long-Context+Inference+%28https%3A%2F%2Farxiv.org%2Fabs%2F2503.08879%29
    14. Double-P: Hierarchical Top-P Sparse Attention for Long-Context LLMs (https://arxiv.org/abs/2602.05191) — Wentao Ni et al., 2026
    https://scholar.google.com/scholar?q=Double-P%3A+Hierarchical+Top-P+Sparse+Attention+for+Long-Context+LLMs+%28https%3A%2F%2Farxiv.org%2Fabs%2F2602.05191%29
    15. ChunkKV: Semantic-Preserving KV Cache Compression for Efficient Long-Context LLM Inference (https://arxiv.org/abs/2502.00299) — Xiang Liu et al., 2025
    https://scholar.google.com/scholar?q=ChunkKV%3A+Semantic-Preserving+KV+Cache+Compression+for+Efficient+Long-Context+LLM+Inference+%28https%3A%2F%2Farxiv.org%2Fabs%2F2502.00299%29
    16. ZipCache: Accurate and Efficient KV Cache Quantization with Salient Token Identification (https://arxiv.org/abs/2405.14256) — Yefei He et al., 2024
    https://scholar.google.com/scholar?q=ZipCache%3A+Accurate+and+Efficient+KV+Cache+Quantization+with+Salient+Token+Identification+%28https%3A%2F%2Farxiv.org%2Fabs%2F2405.14256%29
    17. Accurate KV Cache Quantization with Outlier Tokens Tracing (https://arxiv.org/abs/2505.10938) — Yi Su et al., 2025
    https://scholar.google.com/scholar?q=Accurate+KV+Cache+Quantization+with+Outlier+Tokens+Tracing+%28https%3A%2F%2Farxiv.org%2Fabs%2F2505.10938%29
    18. A Little Goes a Long Way: Efficient Long Context Training and Inference with Partial Contexts (https://arxiv.org/abs/2410.01485) — Suyu Ge et al., 2024
    https://scholar.google.com/scholar?q=A+Little+Goes+a+Long+Way%3A+Efficient+Long+Context+Training+and+Inference+with+Partial+Contexts+%28https%3A%2F%2Farxiv.org%2Fabs%2F2410.01485%29
    19. AI Post Transformers: Memory-Bound, Not Bandwidth-Limited Batch-1 LLM Decode — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-02-memory-bound-not-bandwidth-limited-batch-114799.mp3
    20. AI Post Transformers: FlatAttention for Tile-Based Accelerator Inference — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-04-flatattention-for-tile-based-accelerator-56e6ca.mp3
    21. AI Post Transformers: MiniMax Sparse Attention at Million-Token Scale — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-13-minimax-sparse-attention-at-million-toke-300108.mp3
    22. AI Post Transformers: ScoutAttention for Efficient KV Cache Offloading — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-24-scoutattention-for-efficient-kv-cache-of-b26699.mp3
    23. AI Post Transformers: Deep Kernel Fusion for Transformer Decoding — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-15-deep-kernel-fusion-for-transformer-decod-b1a703.mp3
    24. AI Post Transformers: Stochastic KV Routing for Cache Sharing — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-29-stochastic-kv-routing-for-cache-sharing-5fef63.mp3
    0 min
  • SERA: Repository Specialization for Open Coding Agents
    This episode explores SERA, a method for specializing open-weight coding agents to individual repositories so they learn local APIs, naming conventions, refactor habits, and test idioms as model behavior rather than prompt context. It contrasts that idea with repository-aware retrieval, arguing that while RAG updates faster, weight adaptation could better capture the diffuse, codebase-specific patterns that matter for agentic tasks like searching, planning, editing, and validating changes. The discussion focuses on SERA’s soft-verification pipeline: a teacher model generates repository-grounded edit trajectories and synthetic pull request descriptions, then a second rollout regenerates the patch and keeps examples only when the two edits overlap enough at the line level. A listener would find it interesting because it gets into the practical tradeoff at the heart of coding agents: whether cheaper agreement-based filtering can make repo specialization useful without the heavy infrastructure cost of full execution-based verification.
    Sources:
    1. SERA: Soft-Verified Efficient Repository Agents — Ethan Shen, Daniel Tormoen, Saurabh Shah, Ali Farhadi, Tim Dettmers, 2026
    http://arxiv.org/abs/2601.20789
    2. RepoCoder: Repository-Level Code Completion Through Iterative Retrieval and Generation — Fengji Zhang, Bei Chen, Yue Zhang, Jacky Keung, Jin Liu, Daoguang Zan, Yi Mao, Jian-Guang Lou, Weizhu Chen, 2023
    https://scholar.google.com/scholar?q=RepoCoder%3A+Repository-Level+Code+Completion+Through+Iterative+Retrieval+and+Generation
    3. RepoFusion: Training Code Models to Understand Your Repository — Disha Shrivastava, Denis Kocetkov, Harm de Vries, Dzmitry Bahdanau, Torsten Scholak, 2023
    https://scholar.google.com/scholar?q=RepoFusion%3A+Training+Code+Models+to+Understand+Your+Repository
    4. Customizing an LLM for Enterprise Software Engineering — Aditya Kini, Satish Chandra, Milad Hashemi, Saksham Thakur, Aditya Pandey, Vincent Nguyen, et al., 2026
    https://scholar.google.com/scholar?q=Customizing+an+LLM+for+Enterprise+Software+Engineering
    5. SERA: Soft-Verified Efficient Repository Agents — Ethan Shen, Daniel Tormoen, Saurabh Shah, Ali Farhadi, Tim Dettmers, 2026
    https://scholar.google.com/scholar?q=SERA%3A+Soft-Verified+Efficient+Repository+Agents
    6. CodeT: Code Generation with Generated Tests — Bei Chen, Fengji Zhang, Anh Nguyen, Daoguang Zan, Zeqi Lin, Jian-Guang Lou, Weizhu Chen, 2022
    https://scholar.google.com/scholar?q=CodeT%3A+Code+Generation+with+Generated+Tests
    7. LEVER: Learning to Verify Language-to-Code Generation with Execution — Ansong Ni, Srini Iyer, Dragomir Radev, Ves Stoyanov, Wen-tau Yih, Sida I. Wang, Xi Victoria Lin, 2023
    https://scholar.google.com/scholar?q=LEVER%3A+Learning+to+Verify+Language-to-Code+Generation+with+Execution
    8. SWE-smith: Scaling Data for Software Engineering Agents — John Yang, Kilian Lieret, Carlos E. Jimenez, Alexander Wettig, Kabir Khandpur, Yanzhe Zhang, et al., 2025
    https://scholar.google.com/scholar?q=SWE-smith%3A+Scaling+Data+for+Software+Engineering+Agents
    9. R2E-Gym: Procedural Environments and Hybrid Verifiers for Scaling Open-Weights SWE Agents — N. Jain, J. Singh, M. Shetty, L. Zheng, K. Sen, and I. Stoica, 2025
    https://scholar.google.com/scholar?q=R2E-Gym%3A+Procedural+Environments+and+Hybrid+Verifiers+for+Scaling+Open-Weights+SWE+Agents
    10. RepoST: Scalable Repository-Level Coding Environment Construction with Sandbox Testing — Y. Xie, A. Xie, D. Sheth, P. Liu, D. Fried, and C. P. Rosé, 2025
    https://scholar.google.com/scholar?q=RepoST%3A+Scalable+Repository-Level+Coding+Environment+Construction+with+Sandbox+Testing
    11. SWE-rebench: An Automated Pipeline for Task Collection and Decontaminated Evaluation of Software Engineering Agents — I. Badertdinov, A. Golubev, M. Nekrashevich, A. Shevtsov, S. Karasik, A. Andriushchenko, M. Trofimova, D. Litvintseva, and B. Yangel, 2025
    https://scholar.google.com/scholar?q=SWE-rebench%3A+An+Automated+Pipeline+for+Task+Collection+and+Decontaminated+Evaluation+of+Software+Engineering+Agents
    12. CodeRAG-Bench: Can Retrieval Augment Code Generation? — Z. Z. Wang, A. Asai, X. V. Yu, F. F. Xu, Y. Xie, G. Neubig, and D. Fried, 2024
    https://scholar.google.com/scholar?q=CodeRAG-Bench%3A+Can+Retrieval+Augment+Code+Generation%3F
    13. Terminal-Bench: Benchmarking Agents on Hard, Realistic Tasks in Command Line Interfaces — M. A. Merrill et al., 2026
    https://scholar.google.com/scholar?q=Terminal-Bench%3A+Benchmarking+Agents+on+Hard%2C+Realistic+Tasks+in+Command+Line+Interfaces
    14. Shape of Thought: When Distribution Matters More than Correctness in Reasoning Tasks — A. Chandra, A. Agrawal, A. Hosseini, S. Fischmeister, R. Agarwal, N. Goyal, and A. Courville, 2026
    https://scholar.google.com/scholar?q=Shape+of+Thought%3A+When+Distribution+Matters+More+than+Correctness+in+Reasoning+Tasks
    15. GenX: Mastering Code and Test Generation with Execution Feedback — Nan Wang et al., 2024
    https://scholar.google.com/scholar?q=GenX%3A+Mastering+Code+and+Test+Generation+with+Execution+Feedback
    16. Enhancing LLM-Based Code Translation with Verified Multi-Semantic Representations — Yufu Wang et al., 2026
    https://scholar.google.com/scholar?q=Enhancing+LLM-Based+Code+Translation+with+Verified+Multi-Semantic+Representations
    17. StepCoder: Improve Code Generation with Reinforcement Learning from Compiler Feedback — Shihan Dou et al., 2024
    https://scholar.google.com/scholar?q=StepCoder%3A+Improve+Code+Generation+with+Reinforcement+Learning+from+Compiler+Feedback
    18. Execution-based Code Generation using Deep Reinforcement Learning — Parshin Shojaee et al., 2023
    https://scholar.google.com/scholar?q=Execution-based+Code+Generation+using+Deep+Reinforcement+Learning
    19. Beyond Code Snippets: Benchmarking LLMs on Repository-Level Question Answering — Yoseph Berhanu Alebachew et al., 2026
    https://scholar.google.com/scholar?q=Beyond+Code+Snippets%3A+Benchmarking+LLMs+on+Repository-Level+Question+Answering
    20. AI Post Transformers: AgenticQwen and Small Industrial Tool Agents — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-27-agenticqwen-and-small-industrial-tool-ag-dc676d.mp3
    21. AI Post Transformers: Experimental Comparison of Agentic and Enhanced RAG — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-14-experimental-comparison-of-agentic-and-e-37d8bc.mp3
    22. AI Post Transformers: Trace Rewriting Against Unauthorized LLM Distillation — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-15-trace-rewriting-against-unauthorized-llm-306357.mp3
    23. AI Post Transformers: Learning Facts at Scale with Active Reading — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-25-learning-facts-at-scale-with-active-read-161bea.mp3
    0 min
  • Cache-Resident LLM Inference in GB-Scale Caches
    This episode explores a 2026 paper on cache-resident LLM inference, asking whether modern CPUs with gigabyte-scale last-level caches can cut decoding latency by keeping model weights on-chip instead of repeatedly fetching them from DRAM. It explains why autoregressive decoding is often memory-bound rather than compute-bound, then breaks down the paper’s main design ideas: separating weight-heavy projections and feed-forward work from attention and KV-cache handling, and using fine-grained static scheduling to reduce synchronization overhead. The discussion gets concrete about the system architecture on AMD EPYC 9684X machines, including dual-socket role separation, INT8 weights and KV caches, and locality-aware placement of weight shards and activations. A listener would find it interesting because it gives a sharp, skeptical look at where CPU-based LLM serving might genuinely improve throughput and time-per-output-token, while also arguing that this is a targeted systems win rather than a replacement for GPU-first inference.
    Sources:
    1. Cache-Resident LLM Inference in GB-Scale Last-Level Caches — Wanning Zhang, Tongzhou Gu, Marco Canini, Ceyu Xu, Jian Weng, 2026
    http://arxiv.org/abs/2606.25353
    2. LLM Inference Serving: Survey of Recent Advances and Opportunities — Baolin Li, Yankai Jiang, Vijay Gadepally, Devesh Tiwari, 2024
    https://scholar.google.com/scholar?q=LLM+Inference+Serving%3A+Survey+of+Recent+Advances+and+Opportunities
    3. Efficient Memory Management for Large Language Model Serving with PagedAttention — Woosuk Kwon, Zhuohan Li, Siyuan Zhuang, Ying Sheng, Lianmin Zheng, Hao Zhang, Ion Stoica, et al., 2023
    https://scholar.google.com/scholar?q=Efficient+Memory+Management+for+Large+Language+Model+Serving+with+PagedAttention
    4. Splitwise: Efficient generative LLM inference using phase splitting — Pratyush Patel, Esha Choukse, Chaojie Zhang, Aashaka Shah, Inigo Goiri, Saeed Maleki, Ricardo Bianchini, 2023
    https://scholar.google.com/scholar?q=Splitwise%3A+Efficient+generative+LLM+inference+using+phase+splitting
    5. FlexGen: High-Throughput Generative Inference of Large Language Models with a Single GPU — Ying Sheng, Lianmin Zheng, Binhang Yuan, Zhuohan Li, Joseph E. Gonzalez, Percy Liang, Christopher Re, Ion Stoica, Ce Zhang, et al., 2023
    https://scholar.google.com/scholar?q=FlexGen%3A+High-Throughput+Generative+Inference+of+Large+Language+Models+with+a+Single+GPU
    6. Neural Cache: Bit-Serial In-Cache Acceleration of Deep Neural Networks — Charles Eckert, Xiaowei Wang, Jingcheng Wang, Arun Subramaniyan, Ravi Iyer, Dennis Sylvester, David Blaauw, Reetuparna Das, 2018
    https://scholar.google.com/scholar?q=Neural+Cache%3A+Bit-Serial+In-Cache+Acceleration+of+Deep+Neural+Networks
    7. Proximu$: Efficiently Scaling DNN Inference in Multi-core CPUs through Near-Cache Compute — Anant V. Nori, Rahul Bera, Shankar Balachandran, Joydeep Rakshit, Om J. Omer, Avishaii Abuhatzera, Belliappa Kuttanna, Sreenivas Subramoney, 2020
    https://scholar.google.com/scholar?q=Proximu%24%3A+Efficiently+Scaling+DNN+Inference+in+Multi-core+CPUs+through+Near-Cache+Compute
    8. Inference Performance Optimization for Large Language Models on CPUs — Pujiang He, Shan Zhou, Wenhuan Huang, Changqing Li, Duyi Wang, Bin Guo, Chen Meng, Sheng Gui, Weifei Yu, Yi Xie, 2024
    https://scholar.google.com/scholar?q=Inference+Performance+Optimization+for+Large+Language+Models+on+CPUs
    9. ArcLight: A Lightweight LLM Inference Architecture for Many-Core CPUs — Yuzhuang Xu, Xu Han, Yuxuan Li, Wanxiang Che, 2026
    https://scholar.google.com/scholar?q=ArcLight%3A+A+Lightweight+LLM+Inference+Architecture+for+Many-Core+CPUs
    10. vAttention: Dynamic Memory Management for Serving LLMs without PagedAttention — Ramya Prabhu, Ajay Nayak, Jayashree Mohan, Ramachandran Ramjee, Ashish Panwar, 2025
    https://scholar.google.com/scholar?q=vAttention%3A+Dynamic+Memory+Management+for+Serving+LLMs+without+PagedAttention
    11. Taming Throughput-Latency Tradeoff in LLM Inference with Sarathi-Serve — Amey Agrawal, Nitin Kedia, Ashish Panwar, Jayashree Mohan, Nipun Kwatra, Bhargav Gulavani, Alexey Tumanov, Ramachandran Ramjee, 2024
    https://scholar.google.com/scholar?q=Taming+Throughput-Latency+Tradeoff+in+LLM+Inference+with+Sarathi-Serve
    12. DistServe: Disaggregating Prefill and Decoding for Goodput-Optimized Large Language Model Serving — Yinmin Zhong, Shengyu Liu, Junda Chen, Jianbo Hu, Yibo Zhu, Xuanzhe Liu, Xin Jin, Hao Zhang, 2024
    https://scholar.google.com/scholar?q=DistServe%3A+Disaggregating+Prefill+and+Decoding+for+Goodput-Optimized+Large+Language+Model+Serving
    13. WaferLLM: Large Language Model Inference at Wafer Scale — Congjie He, Yeqi Huang, Pei Mu, Ziming Miao, Jilong Xue, Lingxiao Ma, Fan Yang, Luo Mai, 2025
    https://scholar.google.com/scholar?q=WaferLLM%3A+Large+Language+Model+Inference+at+Wafer+Scale
    14. T-MAC: CPU Renaissance via Table Lookup for Low-Bit LLM Deployment on Edge — Jianyu Wei, Shijie Cao, Ting Cao, Lingxiao Ma, Lei Wang, Yanyong Zhang, Mao Yang, 2025
    https://scholar.google.com/scholar?q=T-MAC%3A+CPU+Renaissance+via+Table+Lookup+for+Low-Bit+LLM+Deployment+on+Edge
    15. Compute Or Load KV Cache? Why Not Both? — Shuowei Jin et al., 2024
    https://arxiv.org/abs/2410.03065
    16. KVFlow: Efficient Prefix Caching for Accelerating LLM-Based Multi-Agent Workflows — Zaifeng Pan et al., 2025
    https://arxiv.org/abs/2507.07400
    17. Reducing Transformer Key-Value Cache Size with Cross-Layer Attention — William Brandon et al., 2024
    https://arxiv.org/abs/2405.12981
    18. QCQA: Quality and Capacity-aware Grouped Query Attention — Vinay Joshi et al., 2024
    https://arxiv.org/abs/2406.10247
    19. Beyond KV Caching: Shared Attention for Efficient LLMs — Bingli Liao and Danilo Vasconcellos Vargas, 2024
    https://arxiv.org/abs/2407.12866
    20. ClusterFusion: Expanding Operator Fusion Scope for LLM Inference via Cluster-Level Collective Primitive — Xinhao Luo et al., 2025
    https://arxiv.org/abs/2508.18850
    21. AI Post Transformers: Memory-Bound, Not Bandwidth-Limited Batch-1 LLM Decode — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-02-memory-bound-not-bandwidth-limited-batch-114799.mp3
    22. AI Post Transformers: Deep Kernel Fusion for Transformer Decoding — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-15-deep-kernel-fusion-for-transformer-decod-b1a703.mp3
    23. AI Post Transformers: ScoutAttention for Efficient KV Cache Offloading — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-24-scoutattention-for-efficient-kv-cache-of-b26699.mp3
    24. AI Post Transformers: CacheFlow and 3D-Parallel KV Cache Restoration — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-01-cacheflow-and-3d-parallel-kv-cache-resto-8db883.mp3
    25. AI Post Transformers: VeriCache: Lossless LLM Inference from Lossy KV Caches — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-02-vericache-lossless-llm-inference-from-lo-df9daf.mp3
    26. AI Post Transformers: Harvest: Borrowing Peer GPU Memory for LLMs — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-02-harvest-borrowing-peer-gpu-memory-for-ll-e9e54f.mp3
    11 min
  • When Finer Microscaling Hurts LLM Quantization
    This episode explores the paper Is Finer Better? The Limits of Microscaling Formats in Large Language Models and examines why shrinking microscaling block sizes can unexpectedly make low-bit LLM quantization worse instead of better. It walks through how microscaling pairs FP4 weights or activations with shared local FP8 scales, contrasts that setup with coarser quantization schemes, and places the work in the broader move from BF16 and FP8 toward cheaper, more hardware-friendly inference. The central argument is that smaller blocks do reduce element quantization error, but once the shared scale is itself quantized into a limited format like FP8 UE4M3, scale error can dominate and degrade perplexity. Listeners would find it interesting because the discussion turns a seemingly obvious engineering intuition on its head and shows that the real bottleneck in low-bit inference may be the precision of the scaling rule, not just the precision of the values being scaled.
    Sources:
    1. Is Finer Better? The Limits of Microscaling Formats in Large Language Models — Andrea Fasoli, Monodeep Kar, Chi-Chun Liu, Swagath Venkataramani, Viji Srinivasan, Leland Chang, Naigang Wang, 2026
    http://arxiv.org/abs/2601.19026
    2. FP8 Formats for Deep Learning — Paulius Micikevicius, Dusan Stosic, Neil Burgess, Marius Cornea, Pradeep Dubey, Richard Grisenthwaite, Sangwon Ha, Alexander Heinecke, Patrick Judd, and others, 2022
    https://arxiv.org/abs/2209.05433
    3. With Shared Microexponents, A Little Shifting Goes a Long Way — Bita Rouhani, Ritchie Zhao, Venmugil Elango, Rasoul Shafipour, Mathew Hall, Maral Mesmakhosroshahi, Ankit More, and others, 2023
    https://arxiv.org/abs/2302.08007
    4. Microscaling Data Formats for Deep Learning — Bita Darvish Rouhani, Ritchie Zhao, Ankit More, Mathew Hall, Alireza Khodamoradi, Summer Deng, Dhruv Choudhary, and others, 2023
    https://arxiv.org/abs/2310.10537
    5. Bridging the Gap Between Promise and Performance for Microscaling FP4 Quantization — Vage Egiazarian, Roberto L. Castro, Denis Kuznedelev, Andrei Panferov, Eldar Kurtic, Shubhra Pandit, Alexandre Marques, Mark Kurtz, Saleh Ashkboos, Torsten Hoefler, Dan Alistarh, 2025
    https://arxiv.org/abs/2509.23202
    6. AMXFP4: Taming Activation Outliers with Asymmetric Microscaling Floating-Point for 4-bit LLM Inference — Janghwan Lee et al., 2024
    https://scholar.google.com/scholar?q=AMXFP4%3A+Taming+Activation+Outliers+with+Asymmetric+Microscaling+Floating-Point+for+4-bit+LLM+Inference
    7. Nanoscaling Floating-Point (NxFP): NanoMantissa, Adaptive Microexponents, and Code Recycling for Direct-Cast Compression of Large Language Models — Yun-Chen Lo, Gu-Yeon Wei, David Brooks, 2024
    https://scholar.google.com/scholar?q=Nanoscaling+Floating-Point+%28NxFP%29%3A+NanoMantissa%2C+Adaptive+Microexponents%2C+and+Code+Recycling+for+Direct-Cast+Compression+of+Large+Language+Models
    8. Elucidating the Design Space of FP4 Training — Robert Hu, Carlo Luschi, Paul Balanca, 2025
    https://scholar.google.com/scholar?q=Elucidating+the+Design+Space+of+FP4+Training
    9. Finer is Better (with the Right Scaling) — Clemens Schaefer, Gil Tabak, 2026
    https://scholar.google.com/scholar?q=Finer+is+Better+%28with+the+Right+Scaling%29
    10. Adaptive Block-Scaled Data Types — Jack Cook et al., 2026
    https://arxiv.org/abs/2603.28765
    11. Diagnosing FP4 inference: a layer-wise and block-wise sensitivity analysis of NVFP4 and MXFP4 — Musa Cim et al., 2026
    https://arxiv.org/abs/2603.08747
    12. Pretraining large language models with MXFP4 — Musa Cim et al., 2026
    https://arxiv.org/abs/2605.09825
    13. Dissecting Outlier Dynamics in LLM NVFP4 Pretraining — Peijie Dong et al., 2026
    https://arxiv.org/abs/2602.02047
    14. DuQuant++: Fine-grained Rotation Enhances Microscaling FP4 Quantization — Haokun Lin et al., 2026
    https://arxiv.org/abs/2604.17789
    15. AdaHOP: Fast and Accurate Low-Precision Training via Outlier-Pattern-Aware Rotation — Seonggon Kim et al., 2026
    https://arxiv.org/abs/2604.02525
    16. AI Post Transformers: Nemotron 3 Ultra for Long-Horizon Agents — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-17-nemotron-3-ultra-for-long-horizon-agents-32e4a5.mp3
    17. AI Post Transformers: PackKV Lossy Compression for KV Caches — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-04-packkv-lossy-compression-for-kv-caches-b37bce.mp3
    18. AI Post Transformers: FlashAttention-4 Conquers Asymmetric GPU Hardware Scaling — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-03-06-flashattention-4-conquers-asymmetric-gpu-78839b.mp3
    12 min
  • Scaling Prompt Tuning for Frozen T5 Models
    This episode explores Brian Lester et al.’s 2021 paper on prompt tuning, which asks whether a large frozen T5 model can be adapted to new tasks by learning only a tiny soft prompt instead of fine-tuning all model weights. It explains the difference between soft prompt tuning, full fine-tuning, prefix-tuning, and GPT-3-style few-shot prompting, and frames the paper as a test of whether scaling laws make lightweight adaptation dramatically more effective at large model sizes. The discussion highlights the key result that prompt tuning lags on smaller models but approaches full fine-tuning on very large T5 checkpoints, with longer prompts and vocabulary-based initialization helping, while a five-token prompt can shrink task-specific parameters from 11 billion to roughly 20,000. Listeners would find it interesting because it connects model-scaling theory to concrete engineering tradeoffs around storage, mixed-task serving, and why industry later gravitated toward PEFT methods like LoRA and adapters.
    Sources:
    1. The Power of Scale for Parameter-Efficient Prompt Tuning — Brian Lester, Rami Al-Rfou, Noah Constant, 2021
    http://arxiv.org/abs/2104.08691
    2. Prefix-Tuning: Optimizing Continuous Prompts for Generation — Xiang Lisa Li, Percy Liang, 2021
    https://arxiv.org/abs/2101.00190
    3. Learning How to Ask: Querying LMs with Mixtures of Soft Prompts — Guanghui Qin, Jason Eisner, 2021
    https://arxiv.org/abs/2104.06599
    4. The Power of Scale for Parameter-Efficient Prompt Tuning — Brian Lester, Rami Al-Rfou, Noah Constant, 2021
    https://arxiv.org/abs/2104.08691
    5. Multitask Prompt Tuning Enables Parameter-Efficient Transfer Learning — Zhen Wang, Rameswar Panda, Leonid Karlinsky, Rogerio Feris, Huan Sun, Yoon Kim, 2023
    https://arxiv.org/abs/2303.02861
    6. Exploring the Limits of Transfer Learning with a Unified Text-to-Text Transformer — Colin Raffel et al., 2020
    https://scholar.google.com/scholar?q=Exploring+the+Limits+of+Transfer+Learning+with+a+Unified+Text-to-Text+Transformer
    7. Language Models are Few-Shot Learners — Tom B. Brown et al., 2020
    https://scholar.google.com/scholar?q=Language+Models+are+Few-Shot+Learners
    8. AutoPrompt: Eliciting Knowledge from Language Models with Automatically Generated Prompts — Taylor Shin, Yasaman Razeghi, Robert L. Logan IV, Eric Wallace, Sameer Singh, 2020
    https://scholar.google.com/scholar?q=AutoPrompt%3A+Eliciting+Knowledge+from+Language+Models+with+Automatically+Generated+Prompts
    9. WARP: Word-level Adversarial ReProgramming — Karen Hambardzumyan, Hrant Khachatrian, Jonathan May, 2021
    https://scholar.google.com/scholar?q=WARP%3A+Word-level+Adversarial+ReProgramming
    10. Parameter-Efficient Transfer Learning for NLP — Neil Houlsby et al., 2019
    https://scholar.google.com/scholar?q=Parameter-Efficient+Transfer+Learning+for+NLP
    11. MRQA 2019 Shared Task: Evaluating Generalization in Reading Comprehension — Adam Fisch, Alon Talmor, Robin Jia, Minjoon Seo, Eunsol Choi, Danqi Chen, 2019
    https://scholar.google.com/scholar?q=MRQA+2019+Shared+Task%3A+Evaluating+Generalization+in+Reading+Comprehension
    12. Task Prompt Vectors: Effective Initialization through Multi-Task Soft-Prompt Transfer — Robert Belanec, Simon Ostermann, Ivan Srba, Maria Bielikova, 2024
    https://scholar.google.com/scholar?q=Task+Prompt+Vectors%3A+Effective+Initialization+through+Multi-Task+Soft-Prompt+Transfer
    13. Parameter-Efficient Fine-Tuning for Medical Text Summarization: A Comparative Study of LoRA, Prompt Tuning, and Full Fine-Tuning — Ulugbek Shernazarov et al., 2026
    https://scholar.google.com/scholar?q=Parameter-Efficient+Fine-Tuning+for+Medical+Text+Summarization%3A+A+Comparative+Study+of+LoRA%2C+Prompt+Tuning%2C+and+Full+Fine-Tuning
    14. MerA: Merging Pretrained Adapters For Few-Shot Learning — Shwai He et al., 2023
    https://scholar.google.com/scholar?q=MerA%3A+Merging+Pretrained+Adapters+For+Few-Shot+Learning
    15. Exploring the Relationship between In-Context Learning and Instruction Tuning — Hanyu Duan et al., 2023
    https://scholar.google.com/scholar?q=Exploring+the+Relationship+between+In-Context+Learning+and+Instruction+Tuning
    16. Is In-Context Learning Sufficient for Instruction Following in LLMs? — Hao Zhao et al., 2024
    https://scholar.google.com/scholar?q=Is+In-Context+Learning+Sufficient+for+Instruction+Following+in+LLMs%3F
    17. Symbol tuning improves in-context learning in language models — Jerry Wei et al., 2023
    https://scholar.google.com/scholar?q=Symbol+tuning+improves+in-context+learning+in+language+models
    18. Last One Standing: A Comparative Analysis of Security and Privacy of Soft Prompt Tuning, LoRA, and In-Context Learning — Rui Wen et al., 2023
    https://scholar.google.com/scholar?q=Last+One+Standing%3A+A+Comparative+Analysis+of+Security+and+Privacy+of+Soft+Prompt+Tuning%2C+LoRA%2C+and+In-Context+Learning
    19. AI Post Transformers: Benchmarking PEFT Techniques for Large Language Models — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-20-benchmarking-peft-techniques-for-large-l-41bbf5.mp3
    0 min
  • Temporal-Tiered KV Cache for Long Context
    This episode explores TTKV, a temporal-tiered key-value cache design for long-context LLM inference, where decode speed degrades because growing KV state turns generation into a memory-bandwidth problem rather than a compute problem. It explains how the method keeps recent cache blocks in fast GPU HBM, evicts older blocks to slower host DRAM, and uses asymmetric quantization in the slow tier, preserving keys at higher precision while compressing values more aggressively. The discussion also breaks down the runtime mechanics behind block-wise streaming attention, including query-conditioned block ranking, top-k prefetching, decompression, and overlapping data transfer with attention computation. What makes the episode interesting is that it treats TTKV less as a new model idea and more as a systems design proposal, while critically questioning whether recency is a reliable proxy for importance and whether the paper fully specifies the cost of its block-selection function.
    Sources:
    1. TTKV: Temporal-Tiered KV Cache for Long-Context LLM Inference — Gradwell Dzikanyanga, Weihao Yang, Hao Huang, Donglei Wu, Shihao Wang, Wen Xia, Sanjeeb K C, 2026
    http://arxiv.org/abs/2604.19769
    2. Efficient Memory Management for Large Language Model Serving with PagedAttention — Woosuk Kwon, Zhuohan Li, Siyuan Zhuang, Ying Sheng, Lianmin Zheng, Cody Hao Yu, Joseph E. Gonzalez, Hao Zhang, Ion Stoica, 2023
    https://scholar.google.com/scholar?q=Efficient+Memory+Management+for+Large+Language+Model+Serving+with+PagedAttention
    3. Efficient Streaming Language Models with Attention Sinks — Guangxuan Xiao, Yuandong Tian, Beidi Chen, Song Han, Mike Lewis, 2023
    https://scholar.google.com/scholar?q=Efficient+Streaming+Language+Models+with+Attention+Sinks
    4. KIVI: A Tuning-Free Asymmetric 2bit Quantization for KV Cache — Zirui Liu, Jiayi Yuan, Hongye Jin, Shaochen Zhong, Zhaozhuo Xu, Vladimir Braverman, Beidi Chen, Xia Hu, 2024
    https://scholar.google.com/scholar?q=KIVI%3A+A+Tuning-Free+Asymmetric+2bit+Quantization+for+KV+Cache
    5. ShadowKV: KV Cache in Shadows for High-Throughput Long-Context LLM Inference — Hanshi Sun, Li-Wen Chang, Wenlei Bao, Size Zheng, Ningxin Zheng, Xin Liu, Harry Dong, Yuejie Chi, Beidi Chen, 2024
    https://scholar.google.com/scholar?q=ShadowKV%3A+KV+Cache+in+Shadows+for+High-Throughput+Long-Context+LLM+Inference
    6. FreeKV: Boosting KV Cache Retrieval for Efficient LLM Inference — Guangda Liu et al., 2025
    https://scholar.google.com/scholar?q=FreeKV%3A+Boosting+KV+Cache+Retrieval+for+Efficient+LLM+Inference
    7. FIER: Fine-Grained and Efficient KV Cache Retrieval for Long-context LLM Inference — Dongwei Wang et al., 2025
    https://scholar.google.com/scholar?q=FIER%3A+Fine-Grained+and+Efficient+KV+Cache+Retrieval+for+Long-context+LLM+Inference
    8. CacheGen: KV Cache Compression and Streaming for Fast Large Language Model Serving — Yuhan Liu et al., 2024
    https://scholar.google.com/scholar?q=CacheGen%3A+KV+Cache+Compression+and+Streaming+for+Fast+Large+Language+Model+Serving
    9. Retrieval Head Mechanistically Explains Long-Context Factuality — Wenhao Wu et al., 2024
    https://arxiv.org/abs/2404.15574
    10. DuoAttention: Efficient Long-Context LLM Inference with Retrieval and Streaming Heads — Guangxuan Xiao et al., 2024
    https://arxiv.org/abs/2410.10819
    11. Query-Focused Retrieval Heads Improve Long-Context Reasoning and Re-ranking — Wuwei Zhang et al., 2025
    https://arxiv.org/abs/2506.09944
    12. LKV: End-to-End Learning of Head-wise Budgets and Token Selection for LLM KV Cache Eviction — Enshuai Zhou et al., 2026
    https://arxiv.org/abs/2605.06676
    13. IndexMem: Learned KV-Cache Eviction with Latent Memory for Long-Context LLM Inference — Xintong Yang et al., 2026
    https://arxiv.org/abs/2605.25475
    14. KVTuner: Sensitivity-Aware Layer-wise Mixed Precision KV Cache Quantization for Efficient and Nearly Lossless LLM Inference — Xing Li et al., 2025
    https://arxiv.org/abs/2502.04420
    15. AsymKV: Enabling 1-Bit Quantization of KV Cache with Layer-Wise Asymmetric Quantization Configurations — Qian Tao et al., 2024
    https://arxiv.org/abs/2410.13212
    16. vAttention: Dynamic Memory Management for Serving LLMs without PagedAttention — Ramya Prabhu et al., 2024
    https://arxiv.org/abs/2405.04437
    17. AI Post Transformers: ScoutAttention for Efficient KV Cache Offloading — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-24-scoutattention-for-efficient-kv-cache-of-b26699.mp3
    18. AI Post Transformers: MiniMax Sparse Attention at Million-Token Scale — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-13-minimax-sparse-attention-at-million-toke-300108.mp3
    19. AI Post Transformers: IndexMem: Learned KV-Cache Eviction for Long-Context LLMs — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-12-indexmem-learned-kv-cache-eviction-for-l-132c2a.mp3
    20. AI Post Transformers: Mooncake for KV Cache-Centric LLM Serving — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-05-mooncake-for-kv-cache-centric-llm-servin-1086d0.mp3
    21. AI Post Transformers: Memory-Bound, Not Bandwidth-Limited Batch-1 LLM Decode — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-02-memory-bound-not-bandwidth-limited-batch-114799.mp3
    22. AI Post Transformers: Why LLM Serving Needs Mathematical Optimization — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-05-why-llm-serving-needs-mathematical-optim-647fc6.mp3
    13 min
  • SuperInfer: SLO-Aware LLM Inference on Superchips
    This episode explores SuperInfer, a system for serving large language models on GH200-style superchips by treating memory management as the key lever for meeting latency targets rather than just maximizing compute use. It explains why KV cache growth, HBM pressure, and head-of-line blocking often hurt responsiveness first, then breaks down how the paper’s RotaSched policy proactively rotates request state out of fast memory to protect time-to-first-token deadlines. It also covers DuplexKV, the transfer mechanism that makes this practical by batching fragmented KV data, using bidirectional movement across NVLink-C2C, and overlapping transfers with model execution instead of stalling the whole system. Listeners would find it interesting because the discussion ties concrete serving pain points to a specific systems design that reportedly boosts TTFT SLO attainment by up to 74.7 percent while keeping throughput and token pacing roughly stable.
    Sources:
    1. SuperInfer: SLO-Aware Rotary Scheduling and Memory Management for LLM Inference on Superchips — Jiahuan Yu, Mingtao Hu, Zichao Lin, Minjia Zhang, 2026
    http://arxiv.org/abs/2601.20309
    2. Pie: Pooling CPU Memory for LLM Inference — Y. Xu, Z. Mao, X. Mo, S. Liu, I. Stoica, 2024
    https://scholar.google.com/scholar?q=Pie%3A+Pooling+CPU+Memory+for+LLM+Inference
    3. Understanding Data Movement in Tightly Coupled Heterogeneous Systems: A Case Study with the Grace Hopper Superchip — L. Fusco, M. Khalilov, M. Chrapek, G. Chukkapalli, T. Schulthess, T. Hoefler, 2024
    https://scholar.google.com/scholar?q=Understanding+Data+Movement+in+Tightly+Coupled+Heterogeneous+Systems%3A+A+Case+Study+with+the+Grace+Hopper+Superchip
    4. Memory Offloading for Large Language Model Inference with Latency SLO Guarantees — C. Ma, Z. Ye, H. Zhao, Z. Yang, T. Fu, J. Han, J. Zhang, Y. Luo, X. Wang, Z. Wang, et al., 2025
    https://scholar.google.com/scholar?q=Memory+Offloading+for+Large+Language+Model+Inference+with+Latency+SLO+Guarantees
    5. Taming Throughput-Latency Tradeoff in LLM Inference with Sarathi-Serve — A. Agrawal, N. Kedia, A. Panwar, J. Mohan, N. Kwatra, B. Gulavani, A. Tumanov, R. Ramjee, 2024
    https://scholar.google.com/scholar?q=Taming+Throughput-Latency+Tradeoff+in+LLM+Inference+with+Sarathi-Serve
    6. Mooncake: Trading More Storage for Less Computation - a KVCache-centric Architecture for Serving LLM Chatbot — R. Qin, Z. Li, W. He, J. Cui, F. Ren, M. Zhang, Y. Wu, W. Zheng, X. Xu, 2025
    https://scholar.google.com/scholar?q=Mooncake%3A+Trading+More+Storage+for+Less+Computation+-+a+KVCache-centric+Architecture+for+Serving+LLM+Chatbot
    7. TokenLake: A Unified Segment-level Prefix Cache Pool for Fine-grained Elastic Long-Context LLM Serving — Bingyang Wu et al., 2025
    https://scholar.google.com/scholar?q=TokenLake%3A+A+Unified+Segment-level+Prefix+Cache+Pool+for+Fine-grained+Elastic+Long-Context+LLM+Serving
    8. KVFlow: Efficient Prefix Caching for Accelerating LLM-Based Multi-Agent Workflows — Zaifeng Pan et al., 2025
    https://scholar.google.com/scholar?q=KVFlow%3A+Efficient+Prefix+Caching+for+Accelerating+LLM-Based+Multi-Agent+Workflows
    9. SAW-INT4: System-Aware 4-Bit KV-Cache Quantization for Real-World LLM Serving — Jinda Jia et al., 2026
    https://scholar.google.com/scholar?q=SAW-INT4%3A+System-Aware+4-Bit+KV-Cache+Quantization+for+Real-World+LLM+Serving
    10. KVQuant: Towards 10 Million Context Length LLM Inference with KV Cache Quantization — Coleman Hooper et al., 2024
    https://scholar.google.com/scholar?q=KVQuant%3A+Towards+10+Million+Context+Length+LLM+Inference+with+KV+Cache+Quantization
    11. DistServe: Disaggregating Prefill and Decoding for Goodput-optimized Large Language Model Serving — Yinmin Zhong et al., 2024
    https://scholar.google.com/scholar?q=DistServe%3A+Disaggregating+Prefill+and+Decoding+for+Goodput-optimized+Large+Language+Model+Serving
    12. Prefill-Decode Aggregation or Disaggregation? Unifying Both for Goodput-Optimized LLM Serving — Chao Wang et al., 2025
    https://scholar.google.com/scholar?q=Prefill-Decode+Aggregation+or+Disaggregation%3F+Unifying+Both+for+Goodput-Optimized+LLM+Serving
    13. Enhancing LLM Efficiency: Targeted Pruning for Prefill-Decode Disaggregation in Inference — Hao Zhang et al., 2025
    https://scholar.google.com/scholar?q=Enhancing+LLM+Efficiency%3A+Targeted+Pruning+for+Prefill-Decode+Disaggregation+in+Inference
    14. AI Post Transformers: Mooncake for KV Cache-Centric LLM Serving — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-05-mooncake-for-kv-cache-centric-llm-servin-1086d0.mp3
    15. AI Post Transformers: LAPS for Length-Aware LLM Serving — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-05-laps-for-length-aware-llm-serving-0c6149.mp3
    16. AI Post Transformers: AI+HW 2035: Co-Designing Efficient AI Systems — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-24-aihw-2035-co-designing-efficient-ai-syst-95c11e.mp3
    17. AI Post Transformers: FengHuang for Rack-Scale LLM Inference Memory — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-12-fenghuang-for-rack-scale-llm-inference-m-62708e.mp3
    18. AI Post Transformers: KVSwap for Disk-Aware Long-Context On-Device Inference — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-16-kvswap-for-disk-aware-long-context-on-de-f3c15e.mp3
    19. AI Post Transformers: Memory-Bound, Not Bandwidth-Limited Batch-1 LLM Decode — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-02-memory-bound-not-bandwidth-limited-batch-114799.mp3
    11 min
  • DSpark Improves Speculative Decoding Acceptance Rates
    This episode explores DSpark, a DeepSeek-AI paper on improving speculative decoding by starting from a DFlash-style block-parallel draft model and increasing how often a larger verifier accepts its proposed tokens. It explains the mechanics of speculative decoding in plain language, situates DSpark within earlier blockwise and multi-token prediction work, and notes that the technique is already used in serving stacks such as vLLM, TensorRT-LLM, and SGLang. The discussion focuses on DSpark’s concrete additions: a Markov head that feeds previous-token information into draft logits, a confidence head that estimates whether drafted tokens will survive verification, and a training recipe centered on knowledge distillation. It is interesting because it treats inference speed as an operational systems problem, arguing that higher acceptance matters but only alongside draft latency, verifier cost, batching, and scheduler behavior.
    Sources:
    1. DSpark Improves Speculative Decoding Acceptance Rates
    https://github.com/deepseek-ai/DeepSpec/blob/main/DSpark_paper.pdf
    2. DFlash: Block Diffusion for Flash Speculative Decoding — Jian Chen, Yesheng Liang, Zhijian Liu, 2026
    https://scholar.google.com/scholar?q=DFlash%3A+Block+Diffusion+for+Flash+Speculative+Decoding
    3. EAGLE-3: Scaling up Inference Acceleration of Large Language Models via Training-Time Test — Yuhui Li, Fangyun Wei, Chao Zhang, Hongyang Zhang, 2025
    https://scholar.google.com/scholar?q=EAGLE-3%3A+Scaling+up+Inference+Acceleration+of+Large+Language+Models+via+Training-Time+Test
    4. Decoding Speculative Decoding — Minghao Yan, Saurabh Agarwal, Shivaram Venkataraman, 2024
    https://scholar.google.com/scholar?q=Decoding+Speculative+Decoding
    5. Speculative Decoding with a Speculative Vocabulary — Miles Williams, Young D. Kwon, Rui Li, Alexandros Kouris, Stylianos I. Venieris, 2026
    https://scholar.google.com/scholar?q=Speculative+Decoding+with+a+Speculative+Vocabulary
    6. DFlare: Scaling Up Draft Capacity for Block Diffusion Speculative Decoding — Jiebin Zhang, Zhenghan Yu, Song Liu, Eugene J. Yu, Zheng Li, Dawei Zhu, Jiangshan Duo, Weimin Xiong, Yifan Song, Guanghua Yu, Jianchen Zhu, Sujian Li, 2026
    https://scholar.google.com/scholar?q=DFlare%3A+Scaling+Up+Draft+Capacity+for+Block+Diffusion+Speculative+Decoding
    7. AI Post Transformers: Speculative Decoding in Real vLLM Serving — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-04-speculative-decoding-in-real-vllm-servin-6f4e2b.mp3
    8. AI Post Transformers: Adaptive Control for Batched Speculative Decoding in LLM Serving — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/adaptive-control-for-batched-speculative-decoding-in-llm-serving/
    9. AI Post Transformers: JETSPEC and Parallel Tree Speculative Decoding — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-27-jetspec-and-parallel-tree-speculative-de-3d144c.mp3
    14 min
  • LLMServingSim 2.0 for Disaggregated LLM Serving
    This episode explores LLMServingSim 2.0, a simulator designed to model how large language models behave when they are served on mixed hardware fleets with separated compute, memory, and networking resources rather than a uniform GPU cluster. It explains the practical serving concepts that shape user experience, including prefill versus decode, time to first token, time per output token, prefix caching, KV-cache movement, and why latency problems emerge from interactions among batching, routing, placement, and interconnect contention rather than a single bottleneck. The discussion highlights the paper’s core idea of a Model Serving Group, which combines queueing, scheduling, operation mapping, memory modeling, and power modeling into one runtime-style unit driven by measured hardware profiles instead of purely theoretical kernel estimates. Listeners would find it interesting because it shows how modern AI performance depends not just on better models, but on the messy systems engineering tradeoffs that determine speed, efficiency, and scalability in real deployments.
    Sources:
    1. LLMServingSim 2.0: A Unified Simulator for Heterogeneous and Disaggregated LLM Serving Infrastructure — Jaehong Cho, Hyunmin Choi, Guseul Heo, Jongse Park, 2026
    http://arxiv.org/abs/2602.23036
    2. DistServe: Disaggregating Prefill and Decoding for Goodput-optimized Large Language Model Serving — Yinmin Zhong et al., 2024
    https://scholar.google.com/scholar?q=DistServe%3A+Disaggregating+Prefill+and+Decoding+for+Goodput-optimized+Large+Language+Model+Serving
    3. P/D-Serve: Serving Disaggregated Large Language Model at Scale — Yibo Jin et al., 2024
    https://scholar.google.com/scholar?q=P%2FD-Serve%3A+Serving+Disaggregated+Large+Language+Model+at+Scale
    4. LMCache: An Efficient KV Cache Layer for Enterprise-Scale LLM Inference — Yuhan Liu, Yihua Cheng, Jiayi Yao, et al., 2025
    https://scholar.google.com/scholar?q=LMCache%3A+An+Efficient+KV+Cache+Layer+for+Enterprise-Scale+LLM+Inference
    5. Mooncake: Trading More Storage for Less Computation - A KVCache-centric Architecture for Serving LLM Chatbot — Ruoyu Qin et al., 2025
    https://scholar.google.com/scholar?q=Mooncake%3A+Trading+More+Storage+for+Less+Computation+-+A+KVCache-centric+Architecture+for+Serving+LLM+Chatbot
    6. NeuPIMs: NPU-PIM Heterogeneous Acceleration for Batched LLM Inferencing — Guseul Heo et al., 2024
    https://scholar.google.com/scholar?q=NeuPIMs%3A+NPU-PIM+Heterogeneous+Acceleration+for+Batched+LLM+Inferencing
    7. Frontier: Towards Comprehensive and Accurate LLM Inference Simulation — Yicheng Feng et al., 2026
    https://scholar.google.com/scholar?q=Frontier%3A+Towards+Comprehensive+and+Accurate+LLM+Inference+Simulation
    8. KVLink: Accelerating Large Language Models via Efficient KV Cache Reuse — Jingbo Yang et al., 2025
    https://scholar.google.com/scholar?q=KVLink%3A+Accelerating+Large+Language+Models+via+Efficient+KV+Cache+Reuse
    9. Selective KV-Cache Sharing to Mitigate Timing Side-Channels in LLM Inference — Kexin Chu et al., 2025
    https://scholar.google.com/scholar?q=Selective+KV-Cache+Sharing+to+Mitigate+Timing+Side-Channels+in+LLM+Inference
    10. Prefill-Decode Aggregation or Disaggregation? Unifying Both for Goodput-Optimized LLM Serving — Chao Wang et al., 2025
    https://scholar.google.com/scholar?q=Prefill-Decode+Aggregation+or+Disaggregation%3F+Unifying+Both+for+Goodput-Optimized+LLM+Serving
    11. Enhancing LLM Efficiency: Targeted Pruning for Prefill-Decode Disaggregation in Inference — Hao Zhang et al., 2025
    https://scholar.google.com/scholar?q=Enhancing+LLM+Efficiency%3A+Targeted+Pruning+for+Prefill-Decode+Disaggregation+in+Inference
    12. AdaServe: SLO-Customized LLM Serving with Fine-Grained Speculative Decoding — Zikun Li et al., 2025
    https://scholar.google.com/scholar?q=AdaServe%3A+SLO-Customized+LLM+Serving+with+Fine-Grained+Speculative+Decoding
    13. SwiftSpec: Ultra-Low Latency LLM Decoding by Scaling Asynchronous Speculative Decoding — Ziyi Zhang et al., 2025
    https://scholar.google.com/scholar?q=SwiftSpec%3A+Ultra-Low+Latency+LLM+Decoding+by+Scaling+Asynchronous+Speculative+Decoding
    14. Nightjar: Dynamic Adaptive Speculative Decoding for Large Language Models Serving — Rui Li et al., 2025
    https://scholar.google.com/scholar?q=Nightjar%3A+Dynamic+Adaptive+Speculative+Decoding+for+Large+Language+Models+Serving
    15. Hetis: Serving LLMs in Heterogeneous GPU Clusters with Fine-grained and Dynamic Parallelism — Zizhao Mo et al., 2025
    https://scholar.google.com/scholar?q=Hetis%3A+Serving+LLMs+in+Heterogeneous+GPU+Clusters+with+Fine-grained+and+Dynamic+Parallelism
    16. AI Post Transformers: Why LLM Serving Needs Mathematical Optimization — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-05-why-llm-serving-needs-mathematical-optim-647fc6.mp3
    17. AI Post Transformers: FengHuang for Rack-Scale LLM Inference Memory — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-12-fenghuang-for-rack-scale-llm-inference-m-62708e.mp3
    18. AI Post Transformers: Vistara Brings CXL Memory to Hyperscale — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-11-vistara-brings-cxl-memory-to-hyperscale-b5199e.mp3
    19. AI Post Transformers: Characterizing LLM KV Cache Workloads in Production — Hal Turing & Dr. Ada Shannon, 2025
    https://podcast.do-not-panic.com/episodes/characterizing-llm-kv-cache-workloads-in-production/
    20. AI Post Transformers: Memory-Bound, Not Bandwidth-Limited Batch-1 LLM Decode — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-06-02-memory-bound-not-bandwidth-limited-batch-114799.mp3
    21. AI Post Transformers: LPU Chip for Low-Latency LLM Inference — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-05-20-lpu-chip-for-low-latency-llm-inference-be13c3.mp3
    22. AI Post Transformers: TokenDance for Multi-Agent KV Cache Sharing — Hal Turing & Dr. Ada Shannon, 2026
    https://podcast.do-not-panic.com/episodes/2026-04-22-tokendance-for-multi-agent-kv-cache-shar-aa9b99.mp3
    0 min

About AI Post Transformers

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AI-generated podcast where hosts Hal Turing and Dr. Ada Shannon discuss the latest research papers and reports in machine learning, AI systems, and optimization. Featuring honest critical analysis,…