Time Appliances Project: Difference between revisions
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Revision as of 14:55, 15 January 2024
Welcome
- Welcome to the OCP Time Appliances Project wiki.
- This Project is open to the public and we welcome all those who would like to be involved.
- Time is a key element to get the highest efficiency in a distributed system. The performance of a distributed system depends on the synchronization of its elements. Several industries such as telecom, mobile, power, industrial, professional audio and video and many more have embraced the need for highly accurate and more importantly reliable distribution and synchronization of time and frequency across packet networks. Although the use case scenario for each of the industries is different, they all share one common thing and that is, time synchronization. Since there is a diverse need for time synchronization across different industries, driven from different use cases and applications, managing the needs of this industry chain becomes a challenge.
Time Appliances Project (TAP) aims to provide a platform to bring together, discuss, standardize and share technologies and solutions across industries with the datacenter applications and datacenter network infrastructure as the main interest. The project aims to bring together the community of datacenter operators, application developers, and equipment and semiconductor companies together to enable datacenter time-sensitive applications such as consistency in distributed systems, edge computing, AR/VR and IoT. These applications will greatly benefit from high accuracy, reliable, and scalable distribution and synchronization of time.
IEEE 1588 Precision Timing Protocol (PTP) and other synchronization methods have been adopted by various industries to maximize the efficiency of various distributed system use cases. Each use case scenario comes with a set of requirements and configurations. These configurations are collected as a ‘PTP profile’. Time appliances project aims to support the development of a PTP profile for datacenter applications and datacenter network infrastructure. The profile will cover time-sensitive applications over OCP-compliant and PTP-aware networking infrastructure such as network switches, network clocks, network interface cards, timing modules & connectors, etc. Additionally, the profile will address various requirements for high accuracy and reliable distribution and synchronization of time, such as expected performance, networking, software API, data models, deployment and telemetry. The project also aims at openness and interoperability through the use of open-source PTP software implementations for timing appliances.
Datacenter applications are the primary target of time appliances project. In addition, the project extends to related topics on time synchronization in academia, research and other industries. The time appliances project brings together the community and will be highly collaborative through technical meetings and collaboration with other OCP Projects including the Networking, Storage, Server, and Telco Projects.
- Disclaimer: Please do not submit any confidential information to the Project Community. All presentation materials, proposals, meeting minutes and/or supporting documents are published by OCP and are open to the public in accordance to OCP's Bylaws and IP Policy. This can be found on the OCP OCP Policies page. If you have any questions please contact OCP.
Mission Statement
- 1. Create specifications and references for Data Center Timing appliances, applications and networking infrastructure
- 2. Promote openness in Timing Appliances and interfaces through open-source implementations
Project Leadership
- - Project Lead: Ahmad Byagowi, Ph.D. (OCP TAP | META)
- - Incubation Committee: Elad Wind (OCP | NVIDIA)
Workstreams
Project | Objective | Lead | Mailing List | Status | |
---|---|---|---|---|---|
#1 | Time Card | Development of the Time Card | Ahmad Byagowi, Ph.D. | Submitted | |
#2 | Open Time Server | Development of an open time server for DC and Edge systems | Dotan Levi Oleg Obleukhov |
Submitted | |
#3 | Data Center PTP Profile | Development of a PTP Profile tailored for data center applications | Michel Ouellette | Submitted | |
#4 | Precision Time APIs | Time APIs to disseminate the time error (error bound) and bring accurate time to the user space | Georgi Chalakov | OCP-TAP-APIs | Submitted |
#5 | Oscillators | Classification and measuring of oscillators | Gary Giust, Ph.D. | Submitted | |
#6 | PTP Servos | Design and Implement Advanced PTP Servos | Alon Regev | Work in progress | |
#7 | Instrumentation and Measurement | Open source instrumentation and measurement/testing tools for PTP | Anand Ram Julian St. James |
Work in progress | |
#8 | Precision Time Synchronization over Wireless | Open source Implementations of Precision Time Synchronization over Wireless | Nobuyasu Shiga, Ph.D. Julian St. James |
Work in progress | |
#9 | Precision Time Measurement Readiness Status | List of Hardware and Software with Precision Time Measurement Support | Kevin Stanton, Ph.D. Julian St. James |
Work in progress |
Get Involved
Documents
Workstream | Name | Format | Version | Date |
---|---|---|---|---|
#1 | Open Time Server | Reference Architecture | v1 | July 28, 2021 |
Time Card | Spec and design package | v1 | July 28, 2021 | |
TAP Software | Software | July 28, 2021 | ||
#2 | Data Center PTP Profile | Spec | v2 | November 3, 2022 |
v1 | August 31, 2021 | |||
#4 | Classification and Measuring of Oscillators | Spec | v1 | January 8, 2022 |
Regular Project Calls
- Wednesdays at 11am PST, starting on July 15th, 2020. Repeats every 2 weeks following that
Join the meeting from your computer, tablet or smartphone:
Dial in:
- +1 929 205 6099 US (New York)
- +1 301 715 8592 US (Washington DC)
- +1 312 626 6799 US (Chicago)
- +1 253 215 8782 US (Tacoma)
- +1 346 248 7799 US (Houston)
- +1 669 900 6833 US (San Jose)
- Meeting ID: 820 8566 5807
Upcoming Calls
Date | Topics | Speakers | |
---|---|---|---|
#94 | Feb-14, 2024 | Precision Data Movement | Dan Biederman |
#93 | Jan-31, 2024 | GNSS augmented sub-ns precision timing and 4 constellation NMA | Roel de Vries |
#92 | Jan-17, 2024 | Let's talk Servos - Key to Synchronization | Greg Armstrong |
Recordings from Past Calls
2024
2022
#62 | Dec-21, 2022 | Precision Timing for Digital Substations | Fred Steinhauser, Ph.D. | Slides |
#61 | Dec-07, 2022 | G-SINC: Global Synchronization Infrastructure for Network Clocks | Marc Frei | Slides |
#60 | Nov-23, 2022 | Enabling Pico-Second Level Space-Time Synchronization | Nobuyasu Shiga, Ph.D. | Slides |
#59 | Nov-09, 2022 | Picosecond-Level Timing and Synchronization | Jamil Abo-Shaeer, Ph.D. | Slides |
#58 | Oct-26, 2022 | The Current offerings of TCXOs, OCXOs and Rubidium Standards | Kory Stone | Slides |
#57 | Oct-12, 2022 | Resilient PNT Standards for Datacenters | Guy Buesnel | Slides |
#56 | Sep-21, 2022 | Resilient Time for the Future | Leon Lobo, Ph.D. | Slides |
#55 | Sep-07, 2022 | White Rabbit for Datacenters | Benoit Rat | Slides |
#54 | Aug-24, 2022 | Time Transfer Across the Network: One Hop at a Time | Thomas Kernen, Nir Nitzani, Bar Shapira | Slides |
#53 | Aug-10, 2022 | Graham: Synchronizing Clocks by Leveraging Local Clock Properties | Ali Najafi, Ph.D. | Slides |
#52 | Jul-27, 2022 | PTP Automation without Validation is just making mistakes faster | Ariel Hendel | Slides |
#51 | Jul-13, 2022 | Window of Uncertainty | Ahmad Byagowi, Ph.D. | Slides |
#50 | Jun-29, 2022 | GNSS Time References | Christian Voit | Slides |
#49 | Jun-15, 2022 | Time Sync in Time Aware Networks | Dhiman Chowdhury | Slides |
#48 | Jun-01, 2022 | Advanced TimeCard and SyncModule for datacenter synchronization | Nir Laufer | Slides |
#47 | May-18, 2022 | GNSS Power over Fiber System | Larry Conway | Slides |
#46 | May-04, 2022 | Optical Timekeeping Efforts at NIST | Jeff Sherman, Ph.D. | Slides |
#45 | Apr-20, 2022 | Precision Time Applications | Dan Biederman | Slides |
#44 | Apr-06, 2022 | Digitized Clocking Technology, Achieving Time Sync Inside and Across a Distributed a Systems | Petre Minciunescu, Ph.D. | Slides |
#43 | Mar-23, 2022 | Opening the FPGA code of the Time Card | Sven Meier & Thomas Schaub | Slides |
#42 | Mar-09, 2022 | Measuring and Monitoring Options for Time Sync Infrastructures | Heiko Gerstung | Slides |
#41 | Feb-23, 2022 | A Continuous UTC; May We Get Rid of Leap Seconds? | Patrizia Tavella, Ph.D. | Slides |
#40 | Feb-09, 2022 | Getting Precision Time Synchronization to End Users | Julian St. James | Slides |
#39 | Jan-26, 2022 | Using LEO Satellites for Time Synchronization | Tyler Reid, Ph.D. | Slides |
#38 | Jan-12, 2022 | Antenna Challenges for GNSS Receivers | Daniel Suster | Slides |
2021
#37 | Dec-15, 2021 | PCIe PTM: Timing in the Last Inch | Christopher Hall | Slides |
#36 | Dec-01, 2021 | Application of Physical Layer Synchronization/Syntonization in a Data Center Environment | Med Belhadj, Ph.D. | Slides |
#35 | Nov-17, 2021 | Oscillator Workstream Update | Gary Guist, Ph.D. | Slides |
#34 | Nov-03, 2021 | Time Service for the Virtual Entity | Dotan Levi | |
#33 | Oct-20, 2021 | Squared: A P2P Overlay Network for Setting up a Scalable PTP clock Synchronization Mesh | Lasse Johnsen | Slides |
#32 | Oct-06, 2021 | Validating PTP follower clock accuracy | Alon Regev | Slides |
#31 | Sep-22, 2021 | Transparent Clock and its Applications | Amit Oren | Slides |
#30 | Sep-08, 2021 | Miniaturized Rubidium Oscillator With The Lowest SWAP Based on Double Resonance | Christian S. Ph.D., Stavros M. Ph.D., Jean-Arnold C | Slides |
#29 | Aug-25, 2021 | Fearless Global Transactions using Clock Synchronization in CockroachDB | Nathan VanBenschoten | Slides |
#28 | Aug-11, 2021 | White Rabbit High Accuracy Timing | Francisco Girela Lopez, Ph.D. | Slides |
#27 | Jul-28, 2021 | Sundial: Fault-tolerant Clock Synchronization for Datacenters | Gautam Kumar & Yuliang Li, Ph.D. | Slides |
#26 | Jul-14, 2021 | Holdover Challenges in NIC Based Boundary Clocks | Eyal Cohen | Slides |
#25 | Jun-30, 2021 | GNSS Anti-Jamming and Spoof Mitigation | Benoit Krummenacker | Slides |
#24 | Jun-16, 2021 | Introduction to IEEE1588-2019 | Doug Arnold, Ph.D. | Slides |
#23 | Jun-02, 2021 | Introduction to MAC and CSACs | Robert Lutwak, Ph.D. | Slides |
#22 | May-19, 2021 | Open Synchronization implementations on Linux/k8s Clusters | Timo Jokiaho & Pasi Vaananen | Slides |
#21 | May-05, 2021 | White Rabbit: An Accurate Time and Frequency Transfer over Ethernet | Maciej Lipinski, Ph.D. | Slides |
#20 | Apr-21, 2021 | Time Scale Ensembles in Uncertain Environments | Marc A. Weiss, Ph.D. | Slides |
#19 | Apr-07, 2021 | Clock and Oscillator Statistics and Characterization Techniques | Slides | |
#18 | Mar-24, 2021 | Introduction to Project Corundum for Time services | Alex Forencich, Ph.D. | Slides |
#17 | Mar-10, 2021 | Oscillators Classification, Workstream #4 goals and kickoff | Gary Giust, Ph.D. | Slides |
#16 | Feb-24, 2021 | GNSS Timing | Samuli Pietila | |
#15 | Feb-10, 2021 | Centralized GNSS Monitoring and Assurance | Nir Laufer | Slides |
#14 | Jan-27, 2021 | Huygens and its Applications | Balaji Prabhakar, Ph.D. | |
#13 | Jan-13, 2021 | TAP 2020 Recap, 2021 Plans | Ahmad Byagowi, Ph.D. | Slides |
2020
#12 | Dec-16, 2020 | Chip Scaled Atomic Clocks | John Kitching, Ph.D. | Slides |
#11 | Dec-02, 2020 | Data Center PTP Profile, Workstream #2 proposal | Michel Ouellette | |
#10 | Nov-18, 2020 | Computer Timekeeping and Synchronization | Kevin Stanton, Ph.D. | Slides |
#09 | Nov-04, 2020 | Time Sync in TSNs (History of TSN, IEEE 802.1AS Overview) | Hesham ElBakoury | Slides |
#08 | Oct-21, 2020 | Starter's guide to ptp4l | Maciej Machnikowski | Slides |
#07 | Oct-07, 2020 | Timing card implementation | Ahmad Byagowi, Ph.D. | |
#06 | Sep-23, 2020 | Practical Use Cases of Synchronized Clocks | Georgi Chalakov | |
#05 | Sep-09, 2020 | Data Center PTP Profile, Workstream #2 goals and draft spec | Michel Ouellette | |
#04 | Aug-26, 2020 | Open Grandmaster (Open Time Server), Workstream #1 goals and draft spec | Oleg Obleukhov | |
#03 | Aug-12, 2020 | TAP Vision as well as the impact of precision oscillator noise on PTP time error | Dotan Levi | |
#02 | Jul-29, 2020 | Detailed Project Proposal and Discussion | Michel Ouellette | |
#01 | Jul-15, 2020 | Proposal to launch OCP-TAP Incubation Project | Ahmad Byagowi, Ph.D. | Slides |
Presentations & Events
OCP Events
- - 2023 | OCP Global Summit | TAP Track
- - 2023 | OCP Regional Summit | TAP Track
- - 2022 | OCP Global Summit | TAP Track
- - 2022 | OCP Tech Talks | TAP Track
- - 2021 | OCP Global Summit | TAP Track
- - 2020 | OCP Tech Week | TAP Track
GTC
.
- - Impact of Oscillator Noise on PTP Time Error by SiTime | Slides Part 1 | Slides Part 2
TAP Media References
- - International Timing and Sync Forum 2022 interviewing Ahmad Byagowi
- - "It's About Time (PTP on the Raspberry Pi)" video from Jeff Geerling Youtube Channel explains the effort on getting PTP on the Raspberry Pi
- - "Why is this PCIe Card RADIOACTIVE?" video from Linus Tech Tips Youtube Channel highlighting the TAP Time Card
- - "The most accurate Raspberry Pi clock IN THE WORLD! Can it do PTP?" video from Jeff Geerling Youtube Channel highlighting the TAP Time Card
- - "Put An Atomic Clock in Your PC - Open Source Time Card" video from Gary Explains Youtube Channel explains the TAP Time Card
- - "Facebook shares its Time Card atomic clock tech to speed internet services" article from C|Net
- - "Supercharges Precision Timing for Facebook’s Next-Generation Time Keeping" developer blog from NVIDIA
References & External Links
- - Spanner, TrueTime & The CAP Theorem by Eric Brewer, Google
- - Sundial: Fault-tolerant Clock Synchronization for Datacenters by Google Inc. and Harvard University
- - Practical Uses of Synchronized Clocks in Distributed Systems by Barbara Liskov
- - Stanford Paper
- - On Time Synchronization Issues in Time-Sensitive Networks with Regulators and Nonideal Clocks
- - Accurate Network Clock Synchronization at Scale
- - Exploiting a Natural Network Effect for Scalable, Fine-grained Clock Synchronization
- - SIMON: A Simple and Scalable Method for Sensing, Inference and Measurement in Data Center Networks
- - New Guidelines for Inclusiveness