Program
HotI 2025 has concluded. Watch the recordings of all HotI 2025 sessions and talks on YouTube!
The times in the program below are Pacific Time (PT).
Conference Day 1: Wednesday, August 20
| Time | Title | Presenters |
|---|---|---|
| 09:20 |
Introduction and Day 1 Welcome
|
General Chair: Artem Polyakov (NVIDIA) |
| 09:30 - 10:30 |
Keynote 1: Now in Focus: the Fifth, GenAI Epoch of Computing Infrastructure
[details]
Session chair: Artem Polyakov (NVIDIA) |
Amin Vahdat (Google)
|
| 10:30 - 10:45 |
Diamond Sponsor Talk: Lightmatter Transforming AI Infrastructure with the Power of 3D Photonics [details]
|
Nick Harris (Lightmatter) |
| 10:45 - 11:00 |
Diamond Sponsor Talk: Cornelis Networks Reimagining the Scale-Out Architecture for HPC and AI [details]
|
Matt Williams (Cornelis Networks) |
| 11:00 - 12:00 |
Technical Paper Session A: Network Synchronization and Routing |
Session chair: Atiqul Mollah (Cornelis Networks) |
bittide: Control Time, Not Flows
|
Martijn Bastiaan, Christiaan Baaij (QBayLogic), Martin Izzard (Google DeepMind), Felix Klein (QBayLogic), Sanjay Lall (Google DeepMind, Stanford University) and Tammo Spalink (Stanford University) | |
| Deadlock-free routing for Full-mesh networks without using Virtual Channels
🏆 Best Academic Paper Award |
Alejandro Cano Cos, Cristóbal Camarero, Carmen Martinez (Universidad de Cantabria) and Ramon Beivide (Universidad de Cantabria, Barcelona Supercomputing Center) | |
| 12:00 - 12:30 | Lunch | |
| 12:30 | Technical Paper Session B: Co-packaged Optics | Session chair: Hossein Hashemi (University of Southern California, Astera Labs) |
| Accelerating Frontier MoE Training with 3D Integrated Optics
🏆 Best Industry Paper Award |
Taylor Groves, Mikhail Bernadskiy, Ho John Lee, Peter Carson, Thomas Graham and Eric Yeh (Lightmatter) | |
| Silicon Photonic Accelerated Memory Pooling for Efficient Compute Resource Allocation
|
Zhenguo Wu and Keren Bergman (Columbia University) | |
| 13:30-13:45 |
Diamond Sponsor Talk: Cisco Managing the fabrics underpinning AI infrastructure [details]
|
Will Eatherton (Cisco) |
| 13:45-14:00 |
Diamond Sponsor Talk: Nubis Overcoming Operational Barriers to AI Scale-Up with Co-Packaged Optics Integration [details]
|
Peter Winzer (Nubis) |
| 14:00 - 15:30 |
Panel – LLM Token Economy: How is networking going to play in the age of agents?
[details]
Session chair: Alan Benjamin (GigaIO) |
Moderator: Peter Olcott (First Spark Ventures) Panelists: Phil Brown (Meta), Davor Capalija (Tenstorrent Inc.), Ethan Lockshin (Groq), Sid Sheth (d-Matrix) |
| 15:30 |
The Head Bubba Memorial & HotI Closing Remarks Day 1
|
Dan Pitt (Palo Alto Innovation Advisors) |
Conference Day 2: Thursday, August 21
| Time | Title | Presenters |
|---|---|---|
| 08:50 |
Day 2 Welcome
|
General Chair: Artem Polyakov (NVIDIA) |
| 09:00 - 10:00 |
Keynote 2: Evolving inter-connect fabric and SDN in the cloud to meet the needs of AI
[details]
Session chair: Dan Pitt (Palo Alto Innovation Advisors) |
Deepak Bansal (Microsoft)
|
| 10:00 - 10:15 |
Diamond Sponsor Talk: Avicena Paradigm Shift in AI Scale Up Clusters using microLED based Interconnects [details]
|
Chris Pfistner (Avicena) |
| 10:15 - 10:25 |
Platinum Sponsor Talk: Arista Multiple Pathways to Energy Efficient Optics [details]
|
Andreas Bechtolsheim (Arista Networks) |
| 10:25 - 10:30 |
Gold Sponsor Talk: GigaIO GigaIO: Empowering Every Accelerator to Lead the AI Inference Revolution [details]
|
Alan Benjamin (GigaIO) |
| 10:30 - 12:00 |
Technical Paper Session C: Interconnect Software – Runtimes & Workloads |
Session chair: Galen Shipman (Los Alamos National Laboratory) |
| Demystifying NCCL: An In-depth Analysis of GPU Communication Protocols and Algorithms
|
Zhiyi Hu, Siyuan Shen, Tommaso Bonato (ETH Zurich), Sylvain Jeaugey (NVIDIA), Cedell Alexander, Eric Spada (Broadcom), James Dinan, Jeff Hammond (NVIDIA) and Torsten Hoefler (ETH Zurich) | |
| Characterizing Communication Patterns in Distributed LLM Inference
|
Lang Xu, Kaushik Kandadi Suresh, Quentin Anthony, Nawras Alnaasan and Dhabaleswar K Panda (The Ohio State University) | |
| FPsPIN: An FPGA-based Open-Hardware Research Platform for Processing in the Network
|
Timo Schneider, Pengcheng Xu and Torsten Hoefler (ETH Zurich) | |
| 12:00 - 12:30 | Lunch | |
| Invited Talk Session: Next Gen Interconnects | Session chair: Taylor Groves (Lightmatter) | |
| 12:30 - 13:00 | Ultra Ethernet for next-generation AI and HPC workloads [details]
|
Torsten Hoefler (ETH Zurich) |
| 13:00 - 13:30 | Building Custom AI Infrastructure with NVLink Fusion [details]
|
Krishnan Geeyarpuram (NVIDIA) |
| 13:30 - 13:40 |
Platinum Sponsor Talk: UALink Why UALink: A Protocol-Level Comparison for Rack-Scale AI [details]
|
Sharada Yeluri (Astera Labs) |
| 13:40 - 13:50 |
Platinum Sponsor Talk: Celestial AI Photonic Fabric: Optical Scale-Up Networks for Accelerated Computing [details]
|
Ravi Mahatme (Celestial AI) |
| 13:50 - 14:00 |
Platinum Sponsor Talk: Meta AI Infra at Meta [details]
|
Wesley Bland (Meta) |
| 14:00 - 15:00 | Technical Paper Session D: Scale-up Interconnects | Session chair: Letizia Giuliano (Alphawave Semi) |
| Micro-LED data interconnect for scale-up networks with record energy efficiency
|
Bardia Pezeshki, Alex Tselikov, Rob Kalman, Suresh Rangarajan, Ivan Huang, Jeff Pepper, Sarah Zou, Howard Rourke and Alasdair Fikouras (AvicenaTech Corp) | |
| On-Package Memory with Universal Chiplet Interconnect Express (UCIe): A Low Power, High Bandwidth, Low Latency and Low Cost Approach
|
Debendra Das Sharma, Swadesh Choudhary, Peter Onufryk (Intel) and Robert Pelt (AMD) | |
| 15:00 |
HotI Awards
|
Yiltan Temucin (AMD) and Ryan Grant (Queen’s University) |
| 15:10 |
HotI Closing Remarks
|
Vice Chair: Sayan Ghosh (Pacific Northwest National Laboratory) |
Tutorial:
Conference Day 3: Friday, August 22
Track 1
| Time | Title | Presenters |
|---|---|---|
| Morning Sessions | Session chair: Mike Adams (University of New Mexico) | |
| 08:30 - 12:00 | Principles and Practice of Scalable and Distributed Deep Neural Networks Training and Inference
[details]
|
Dhabaleswar K. (DK) Panda, Nawras Alnaasan (The Ohio State University)
|
| 12:00 - 13:00 | Lunch | |
| Afternoon Session | Session chair: Nicole Avans (Tennessee Technological University) | |
| 13:00 - 16:30 | High-Performance and Smart Networking Technologies for HPC and AI
[details]
|
Dhabaleswar K. (DK) Panda, Benjamin Michalowicz (The Ohio State University)
|
Track 2
| Time | Title | Presenters |
|---|---|---|
| Morning Sessions A | Session chair: Matthew Dosanjh (Sandia National Laboratories) | |
| 7:00 - 8:30 | Libfabric Communication Library
[details]
|
Rajalaxmi Angadi, Alexia Ingerson (Intel)
|
| Morning Sessions B | Session chair: Jackson Wesley (UNM) | |
| 08:30 - 12:00 | GPU Communication Libraries for Accelerating HPC and AI Applications
[details]
|
Benjamin Glick Pouya Kousha, Arnav Goel (NVIDIA), Andreas Herten (Jülich Supercomputing Centre)
|