Time Appliances Project: Difference between revisions

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==Welcome==
==Welcome==


:Welcome to the OCP Time Appliance Project wiki.
: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.
: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 [http://www.opencompute.org/about/ocp-policies/ OCP Policies] page.  If you have any questions please contact OCP.
: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 [http://www.opencompute.org/about/ocp-policies/ OCP Policies] page.  If you have any questions please contact OCP.


===Project Leadership===
==Mission Statement==
:- Dotan Levin (NVidia)
:1. Create specifications and references for '''Data Center Timing''' appliances, applications and networking infrastructure
:- Michel Ouellette (FB)
:2. Promote openness in '''Timing Appliances''' and interfaces through open-source implementations
:- Ahmad Byagowi (FB)
 
==Project Leadership==
:- Lead: [mailto:ahmad.byagowi@ocproject.net Ahmad Byagowi, Ph.D.] (OCP TAP | META)
:- Incubation Committee: [mailto:elad.wind@ocproject.net Elad Wind] (OCP | NVIDIA)
:- Communication: [mailto:lasse@timebeat.app Lasse Johnsen] (TimeBeat.app)
 
==Workstreams==
{| class="wikitable"
|-
!
! Project !! Objective !! Lead !! Mailing List !! Status
|-
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Open-Time-Server #1]
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Open-Time-Server Open Time Server]
| Development of an open time server for DC and Edge systems
| [mailto:leoleovich@fb.com Oleg Obleukhov] & <br> [mailto:dotanl@nvidia.com Dotan Levi]
|
| [https://www.opencompute.org/contributions Submitted]
|-
| [https://www.opencompute.org/wiki/TAP_Data_Center_PTP_Profile #2]
| [https://www.opencompute.org/wiki/TAP_PTP_Profile Data Center PTP Profile] 
| Development of a PTP Profile tailored for data center applications
| [mailto:michelouellette@meta.com Michel Ouellette]
|
| [https://www.opencompute.org/contributions Submitted]
|-
| [https://www.opencompute.org/wiki/TAP_Precision_Time_APIs #3]
| [https://www.opencompute.org/wiki/TAP_Precision_Time_APIs Precision Time APIs]
| Time APIs to disseminate the time error (error bound) and bring accurate time to the user space
| [mailto:gemicha@gmail.com Georgi Chalakov]
| [https://ocp-all.groups.io/g/OCP-TAP-APIs OCP-TAP-APIs]
| Work in progress
|-
| [https://www.opencompute.org/wiki/TAP_Oscillators #4]
| [https://www.opencompute.org/wiki/TAP_Oscillators Oscillators]
| Classification and measuring of oscillators
| [mailto:ggiust@sitime.com Gary Giust]
|
| [https://www.opencompute.org/contributions Submitted]
|-
| [https://www.opencompute.org/wiki/TAP_PTP_Servos #5]
| [https://www.opencompute.org/wiki/TAP_PTP_Servos PTP Servos]
| Design and Implement Advanced PTP Servos
| [mailto:alon.regev@keysight.com Alon Regev]
|
| Work in progress
|-
| [https://www.opencompute.org/wiki/TAP_Instrumentation #6]
| [https://www.opencompute.org/wiki/TAP_Instrumentation Instrumentation and Measurement]
| Open source instrumentation and measurement/testing tools for PTP
| [mailto:anand.ram@calnexsol.com Anand Ram] & <br> [mailto:julianstj@fb.com Julian St. James]
|
| Work in progress
|}


==Get Involved==
==Get Involved==
:- [https://ocp-all.groups.io/g/OCP-TAP TAP Mailing List]
:- [https://ocp-all.groups.io/g/OCP-TAP TAP Mailing List]
:- [http://opencompute.org/projects/projects-calendar/ OCP Projects Calendar]
:- [https://www.opencompute.org/projects/time-appliances-project-tap OCP Projects Calendar]
:- [https://discord.gg/FkzE4GWmsS Join TAP Discord server]
 
==Documents==
:- [https://146a55aca6f00848c565-a7635525d40ac1c70300198708936b4e.ssl.cf1.rackcdn.com/files/c6eee7bea1d297fe82bd18a7f38dfb1806ec1806.pdf Charter]
:- [https://github.com/opencomputeproject/Time-Appliance-Project TAP GitHub]
:- [http://linkedin.com/company/ocp-tap TAP LinkedIn]
:- [https://www.facebook.com/ocptap TAP Facebook]
:- [https://drive.google.com/drive/folders/1EDE9Pj1eZj2sF7fUGOnVmwGTf4U6yonr?usp=sharing Google Drive Document Repository]
 
 
 
{| class="wikitable"
|-
! Workstream !! Name !! Format !! Version !! Date
 
<!-- #1  -->
|-
| rowspan=3 style="text-align:center;"  |'''#1'''
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Open-Time-Server Open Time Server]
| Reference Architecture
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Open-Time-Server v1]
| July 28, 2021
|-
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Time-Card Time Card]
| Spec and design package
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Time-Card v1]
| July 28, 2021
|-
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Software TAP Software]
| Software
|
| July 28, 2021
<!-- #2  -->
|-
| rowspan=2 style="text-align:center;" |'''#2'''
| rowspan=2 |Data Center PTP Profile
| rowspan=2 |Spec
| [https://drive.google.com/file/d/18Y3r1pVkGsEuPmcHkLtuwrQbYi6s-ypM/view?usp=share_link v2]
| November 3, 2022
|-
| [https://drive.google.com/file/d/1e69lDl2d-zupbbHasedUQqg-3NP0TIpt/view?usp=drivesdk v1]
| August 31, 2021
<!-- #4  -->
|-
| style="text-align:center;" | '''#4'''
| [https://www.opencompute.org/documents/ocp-tap-oscillator-spec-jan-8-2022-docx-pdf Classification and Measuring of Oscillators]
| Spec
| v1
| January 8, 2022
|}


==Regular Project Calls==
==Regular Project Calls==
:- TBD
:- Wednesdays at 11am PST, starting on July 15th, 2020. Repeats every 2 weeks following that
 
Join the meeting from your computer, tablet or smartphone:
https://meet.goto.com/tap                     
 
Dial in:                               
United States (Toll Free): +1 877 309 2073                                       
United States:            +1 571 317-3129                                       
Access Code:                565-185-493
 
===Upcoming Calls===
{| class="wikitable sortable"
|-
!
! Date !! Topics !! Speakers
 
|-
| #73
| <font color="green">May-24, 2023</font>
| <font color="green">Research on PTP in Smart Grid at NIST</font>
| <font color="green">Ya-Shian Li-Baboud</font>
 
|-
| #72
| <font color="green">May-10, 2023</font>
| <font color="green">PTP Track Hound v2 - The central monitoring hub for timing-critical infrastructure</font>
| <font color="green">Thomas Behn</font>
 
|-
| #71
| <font color="green">Apr-26, 2023</font>
| <font color="green">PTP based FbClock vs HLC</font>
| <font color="green">Lu Pan</font>
 
|-
| #70
| <font color="green">Arp-12, 2023</font>
| <font color="green">PTM Round Table</font>
| <font color="green"> K. Stanton, W. Wasko, K. Bryant, L. Johnsen</font>
 
|-
| #69
| <font color="green">Mar-29, 2023</font>
| <font color="green">COTS based Jitterbug Timing Measurement System</font>
| <font color="green">Myrick Wilbur, Ph.D.</font>
 
|-
| #68
| <font color="green">Mar-15, 2023</font>
| <font color="green">Integrated acoustic resonators in commercial Fin-FET technology</font>
| <font color="green">Dana Weinstein, Ph.D.</font>
 
|-
| #67
| <font color="green">Mar-01, 2023</font>
| <font color="green">Timing Resilience and Security at the Core of GNSS Technology</font>
| <font color="green">Gustavo Lopez</font>
|}
 
===Recordings from Past Calls===
{| class="wikitable sortable"
|-
!
! Date !! Topics !! Speakers !! Slides
|-
| #66
| Feb-15, 2023
| [https://www.youtube.com/watch?v=C7k7ckGubT0 Trading off Consistency and Availability in Cyber-Physical Systems]
| Edward A. Lee, Ph.D.
| [https://drive.google.com/file/d/1vZ6XE6EtGG6bBenenfsHhCJae82MP6NF/view?usp=sharing Slides]
|-
| #65
| Feb-01, 2023
| [https://www.youtube.com/watch?v=8D1HYXl_4ug SyncESMC - an ITU-T G.781 Multi-Clock ESMC Implementation]
| Vipin Sharma
| [https://docs.google.com/presentation/d/17DaakAe6mvpIGzVCOMH31n1J9usw7JSb/edit?usp=sharing&ouid=104727018165459345315&rtpof=true&sd=true Slides]
|-
| #64
| Jan-18, 2023
| [https://www.youtube.com/watch?v=JEUGI9GqbeA Overview of Timestamping and Synchronization Infrastructure at the Deutsche Boerse]
| Georg Sauthoff, Ph.D.
| [https://drive.google.com/file/d/1MV1HdF1Wmkp0q_tli0U966SZP1H5lahR/view?usp=sharing Slides]
 
|-
| #63
| Jan-04, 2023
| [https://www.youtube.com/watch?v=g7AssLqYOTE Time & Frequency Measurements with Picosecond Streaming Time-to-Digital Converters]
| Helmut Fedder, Ph.D.
| [https://drive.google.com/file/d/1W2w3_bueBM1nox2pU-3wEckSx5WW1N_9/view?usp=sharing Slides]
 
|-
|
 
|-
| #62
| Dec-21, 2022
| [https://www.youtube.com/watch?v=yCciCdXmEKM Precision Timing for Digital Substations]
| Fred Steinhauser, Ph.D.
| [https://drive.google.com/file/d/1Im1Q5_ltfWVHkpWq9CRzuSWRBv3aJzsc/view?usp=sharing Slides]
 
|-
| #61
| Dec-07, 2022
| [https://www.youtube.com/watch?v=vevyOrs1Y_0 G-SINC: Global Synchronization Infrastructure for Network Clocks]
| Marc Frei
| [https://drive.google.com/file/d/1f8lCatOc5MZlx0GU5hqpiNJuFG9ejP1U/view?usp=sharing Slides]
 
|-
| #60
| Nov-23, 2022
| [https://www.youtube.com/watch?v=WiH4YyAjnHg Enabling Pico-Second Level Space-Time Synchronization]
| Nobuyasu Shiga, Ph.D.
| [https://drive.google.com/file/d/1GlD55agZARONkRA8AIzeky3tPP3dCQ59/view?usp=share_link Slides]
 
|-
| #59
| Nov-09, 2022
| [https://www.youtube.com/watch?v=7xuga7oyjqk Picosecond-Level Timing and Synchronization]
| Jamil Abo-Shaeer, Ph.D.
| [https://drive.google.com/file/d/1zbhtGYedFTii290_ZcaJnQP8-1tj09HH/view?usp=sharing Slides]
 
|-
| #58
| Oct-26, 2022
| [https://www.youtube.com/watch?v=GV84Ir5cbA8 The Current offerings of TCXOs, OCXOs and Rubidium Standards]
| Kory Stone
| [https://drive.google.com/file/d/1L2riFaMqAKX0bZJ5UIXxM9s8e8xkmGg9/view?usp=sharing Slides]
 
|-
| #57
| Oct-12, 2022
| [https://www.youtube.com/watch?v=rmvjPIjKgmc Resilient PNT Standards for Datacenters]
| Guy Buesnel
| [https://drive.google.com/file/d/1rX64Hra_6k-Ij-FgdzLa_8GmczkxS3sh/view?usp=sharing Slides]
 
|-
| #56
| Sep-21, 2022
| [https://www.youtube.com/watch?v=pPVos9lF1o8&ab_channel=OpenComputeProject Resilient Time for the Future]
| Leon Lobo, Ph.D.
| [https://drive.google.com/file/d/1m1WxhrXNNv7b5N0pkNLk_kCcoXL10MEX/view?usp=sharing Slides]
|
 
|-
| #55
| Sep-07, 2022
| [https://transcripts.gotomeeting.com/#/s/1db8f5e5bec92926063f3c80f75307e89d4888f43be801cbdc8125c9cdca8f14 White Rabbit for Datacenters]
| Benoit Rat
| [https://drive.google.com/file/d/1p2wZeBY2RDcec9EnvfpqVcrAeuYFjB8N/view?usp=sharing Slides]
|-
 
 
|-
| #54
| Aug-24, 2022
| [https://transcripts.gotomeeting.com/#/s/0571a3b3785e6e0dc4e1a7ac72388aa32e949a0c0fa9c97078ab3315c18d38f7 Time Transfer Across the Network: One Hop at a Time]
| Thomas Kernen, Nir Nitzani, Bar Shapira
| [https://drive.google.com/file/d/1iyhCawVWr0-Y3m0R6l--47IVtzF09E5_/view?usp=sharing Slides]
|-
 
|-
| #53
| Aug-10, 2022
| [https://www.youtube.com/watch?v=1KOGS1lniaw Graham: Synchronizing Clocks by Leveraging Local Clock Properties]
| Ali Najafi, Ph.D.
| [https://docs.google.com/presentation/d/1CS9iPW5vJxjrSzh4c6xfhUCX1-a0uPlf/edit?usp=sharing Slides]
 
|-
| #52
| Jul-27, 2022
| [https://www.youtube.com/watch?v=0kQUM8zY1-w PTP Automation without Validation is just making mistakes faster]
| Ariel Hendel
| [https://drive.google.com/file/d/1vkZiaTappOJ8dCb9RiKolEl6xQL1EIFs/view?usp=sharing Slides]
 
|-
| #51
| Jul-13, 2022
| [https://www.youtube.com/watch?v=u_inH9yPVbE Window of Uncertainty]
| Ahmad Byagowi, Ph.D.
| [https://docs.google.com/presentation/d/1QOmwQz5O25e0QwsYo2osJLT8EapIcFxd/edit#slide=id.p1 Slides]
 
|-
| #50
| Jun-29, 2022
| [https://www.youtube.com/watch?v=4wseAJtkhr0 GNSS Time References]
| Christian Voit
| [https://drive.google.com/file/d/1jsEDGjpU3K5c5By7lxW3tIf-PR-vVmT7/view?usp=sharing Slides]
 
|-
| #49
| Jun-15, 2022
| [https://www.youtube.com/watch?v=lXmyyOLxxZ0 Time Sync in Time Aware Networks]
| Dhiman Chowdhury
| [https://drive.google.com/file/d/14Jf57pbHoOCM1vPP3BDdL6jUx0dalo-_/view?usp=sharing Slides]
 
|-
| #48
| Jun-01, 2022
| [https://www.youtube.com/watch?v=DsttQHsf9OI Advanced TimeCard and SyncModule for datacenter synchronization]
| Nir Laufer
| [https://docs.google.com/presentation/d/1f2kQ63WBQthrot0he5iLhSAHm2jcbRlt/edit?usp=sharing&ouid=115393317224397591365&rtpof=true&sd=true Slides]
 
|-
| #47
| May-18, 2022
| [https://www.youtube.com/watch?v=KEyEbqnDNuY GNSS Power over Fiber System]
| Larry Conway
| [https://drive.google.com/file/d/1xnctMrsKDJn7udxB-bincLFfz44gPglC/view?usp=sharing Slides]
 
|-
| #46
| May-04, 2022
| [https://www.youtube.com/watch?v=EWiCwTaiM1A Optical Timekeeping Efforts at NIST]
| Jeff Sherman, Ph.D.
| [https://drive.google.com/file/d/1X1URxxz4JZTdmAp4eiglpp07_03ygUwK/view?usp=sharing Slides]
 
|-
| #45
| Apr-20, 2022
| [https://www.youtube.com/watch?v=bBvfFCqzEC4 Precision Time Applications]
| Dan Biederman
| [https://drive.google.com/file/d/10t-jfT8sWCByCnVMNxT8vmRlSZS0a2di/view?usp=sharing Slides]
 
|-
| #44
| Apr-06, 2022
| [https://www.youtube.com/watch?v=heGeqkSzALs Digitized Clocking Technology, Achieving Time Sync Inside and Across a Distributed a Systems]
| Petre Minciunescu, Ph.D.
| [https://drive.google.com/file/d/1ikp-SQ2fzD19miCGQFvTa_0rtMmryK-U/view?usp=sharing Slides]
 
|-
| #43
| Mar-23, 2022
| [https://www.youtube.com/watch?v=93NQKXBIRKw Opening the FPGA code of the Time Card]
| Sven Meier & Thomas Schaub
| [https://drive.google.com/file/d/1vHgtRRjC_1AaNBZe0kBP1IawKhZ3fKR6/view?usp=sharing Slides]
 
|-
| #42
| Mar-09, 2022
| [https://www.youtube.com/watch?v=HvD3sXQTxVU Measuring and Monitoring Options for Time Sync Infrastructures]
| Heiko Gerstung
| [https://docs.google.com/presentation/d/1UT73AFPgdOfeFD8XAkt05CUIEngKynHO/edit?usp=sharing&ouid=104727018165459345315&rtpof=true&sd=true Slides]
 
|-
| #41
| Feb-23, 2022
| [https://www.youtube.com/watch?v=PwowsxsOyQ4 A Continuous UTC; May We Get Rid of Leap Seconds?]
| Patrizia Tavella, Ph.D.
| [https://drive.google.com/file/d/1bXHs4EI1J9BRzkU4Z0pg0KCSwmfcOPT3/view?usp=sharing Slides]
 
|-
| #40
| Feb-09, 2022
| [https://www.youtube.com/watch?v=CAyN3RtO51A Getting Precision Time Synchronization to End Users]
| Julian St. James
| [https://drive.google.com/file/d/1ncZ-k72bzSsQoei4PPWyN0rWdt_0kOib/view?usp=sharing Slides]
 
|-
| #39
| Jan-26, 2022
| [https://www.youtube.com/watch?v=aAkKceA4UIk Using LEO Satellites for Time Synchronization]
| Tyler Reid, Ph.D.
| [https://drive.google.com/file/d/1HhNBkhQsh2ucdlxfKtlnPk7dhp4yNlpX/view?usp=sharing Slides]
 
|-
| #38
| Jan-12, 2022
| [https://www.youtube.com/watch?v=XiuAevnsWhQ Antenna Challenges for GNSS Receivers]
| Daniel Suster
| [https://drive.google.com/file/d/1PUiHj8_dsOOd6L3VnraldWSkbbajCXAF/view?usp=sharing Slides]
 
|-
|
 
|-
| #37
| Dec-15, 2021
| [https://www.youtube.com/watch?v=JgHD1CU4Ycs PCIe PTM: Timing in the Last Inch]
| Christopher Hall
| [https://drive.google.com/file/d/1OKAOjRzZHlaNoHE7USXpOyIBU0_1EytU/view?usp=sharing Slides]
 
|-
| #36
| Dec-01, 2021
| [https://www.youtube.com/watch?v=oPTIp3qE2Gs Application of Physical Layer Synchronization/Syntonization in a Data Center Environment]
| Med Belhadj, Ph.D.
| [https://drive.google.com/file/d/1fle9tBnJfYL-Sg_PdHkfntxOSgLoos8n/view?usp=sharing Slides]
 
|-
| #35
| Nov-17, 2021
| [https://www.youtube.com/watch?v=7Ot420LJUDw Oscillator Workstream Update]
| Gary Guist, Ph.D.
| [https://drive.google.com/file/d/1k9ZTTYAqdyviUKSJd_JmM8CH3LKBPf5w/view?usp=sharing Slides]
 
|-
|#34
| Nov-03, 2021
| [https://www.youtube.com/watch?v=coa6OkTbD5M Time Service for the Virtual Entity]
| Dotan Levi
|
 
|-
|#33
| Oct-20, 2021
| [https://www.youtube.com/watch?v=T1dYGiCZjc8 Squared: A P2P Overlay Network for Setting up a Scalable PTP clock Synchronization Mesh]
| Lasse Johnsen
| [https://drive.google.com/file/d/1oWJqS68MjEFX-34LW7aHZ_QlOnBL-qnm/view?usp=sharing Slides]
|-
 
| #32
| Oct-06, 2021
| [https://www.youtube.com/watch?v=5jbUJeHaRBU Validating PTP follower clock accuracy]
| Alon Regev
| [https://drive.google.com/file/d/1BLqaCoF8tnZtwA-jlMmfs1_xNNCR8Nd8/view?usp=sharing Slides]
 
|-
| #31
| Sep-22, 2021
| [https://www.youtube.com/watch?v=nwbPtG6f7eI Transparent Clock and its Applications]
| Amit Oren
| [https://drive.google.com/file/d/1gB8uSXkX4OV7yNYUdg8JLFqNeYwYG3Et/view?usp=sharing Slides]
 
|-
| #30
| Sep-08, 2021
| [https://www.youtube.com/watch?v=vj2nM9N7F9g Miniaturized Rubidium Oscillator With The Lowest SWAP Based on Double Resonance]
| Christian S. Ph.D., Stavros M. Ph.D., Jean-Arnold C
| [https://drive.google.com/file/d/1Uap6vcQyrY-X9sWkjE3IZCxdaWHTnWET/view?usp=sharing Slides]
 
|-
| #29
| Aug-25, 2021
| [https://www.youtube.com/watch?v=MUhEbmjAweA Fearless Global Transactions using Clock Synchronization in CockroachDB]
| Nathan VanBenschoten
| [https://drive.google.com/file/d/1otcpgZa4eXwfkcTTRgiOT_SqrkogOeZh/view?usp=sharing Slides]
 
|-
| #28
| Aug-11, 2021
| [https://www.youtube.com/watch?v=4MAMxTgp-gg White Rabbit High Accuracy Timing]
| Francisco Girela Lopez, Ph.D.
| [https://drive.google.com/file/d/1lj6lauC6XSzPOqteTLr3M6aSRkKgufEO/view?usp=sharing Slides]
 
|-
| #27
| Jul-28, 2021
| [https://www.youtube.com/watch?v=AUU0A9gVkvw Sundial: Fault-tolerant Clock Synchronization for Datacenters]
| Gautam Kumar & Yuliang Li, Ph.D.
| [https://drive.google.com/file/d/11caMgoSODkOvsl2gNF-dGna3dNJXdrCX/view?usp=sharing Slides]
 
|-
| #26
| Jul-14, 2021
| [https://www.youtube.com/watch?v=NlZnbndnL_A Holdover Challenges in NIC Based Boundary Clocks]
| Eyal Cohen
| [https://docs.google.com/presentation/d/1AtLNeFJ-j1lYHvAYR4TOdZ48U9hh34WX/edit?usp=sharing&ouid=104727018165459345315&rtpof=true&sd=true Slides]
 
|-
| #25
| Jun-30, 2021
| [https://www.youtube.com/watch?v=xu1EtozIakY GNSS Anti-Jamming and Spoof Mitigation]
| Benoit Krummenacker
| [https://drive.google.com/file/d/1PHNCSBq2IndOxIK29MsHthadiUbP9NcE/view?usp=sharing Slides]
 
|-
| #24
| Jun-16, 2021
| [https://www.youtube.com/watch?v=E-x939MMV3A Introduction to IEEE1588-2019]
| Doug Arnold, Ph.D.
| [https://drive.google.com/file/d/1tBimVperDldY4cIMY0wbjvVZYbvXCLjn/view?usp=sharing Slides]
 
|-
| #23
| Jun-02, 2021
| Introduction to MAC and CSACs
| Robert Lutwak, Ph.D.
| [https://drive.google.com/file/d/1VYnkZlWSSs66f9x9BA-5Nza-myv3w3Qz/view?usp=sharing Slides]
 
|-
| #22
| May-19, 2021
| [https://www.youtube.com/watch?v=G_vRHOExcTA Open Synchronization implementations on Linux/k8s Clusters]
| Timo Jokiaho & Pasi Vaananen
| [https://drive.google.com/file/d/1qU87Fys2wDBNK_3kyylwOCW1J752IPzi/view?usp=sharing Slides]
|-
| #21
| May-05, 2021
| [https://www.youtube.com/watch?v=pqTsCFM6lCo White Rabbit: An Accurate Time and Frequency Transfer over Ethernet]
| Maciej Lipinski, Ph.D.
| [https://drive.google.com/file/d/14x5HVGhhRivVNs1JYO1kPvsthuuP-Kce/view?usp=sharing Slides]
|-
| #20
| Apr-21, 2021
| [https://www.youtube.com/watch?v=gizVwrBegYo Time Scale Ensembles in Uncertain Environments]
| rowspan="2" | Marc A. Weiss, Ph.D.
| [https://drive.google.com/file/d/1ERLlsJz70t8_GDSlVnDEOCxqWWYO7jYd/view?usp=sharing Slides]
|-
| #19
| Apr-07, 2021
| [https://www.youtube.com/watch?v=rSsSAlP2eIA Clock and Oscillator Statistics and Characterization Techniques]
| [https://drive.google.com/file/d/1V8zDETnZX_PjxGYog8bKgokKqnUjR95X/view?usp=sharing Slides]
|-
| #18
| Mar-24, 2021
| [https://www.youtube.com/watch?v=5zMdYlPipXU Introduction to Project Corundum for Time services]
| Alex Forencich, Ph.D.
| [https://drive.google.com/file/d/1GsFh9jlnloI6f7JOSQjV66LTi2o07BXD/view?usp=sharing Slides]
|-
| #17
| Mar-10, 2021
| [https://www.youtube.com/watch?v=cYNAyCC53sc Oscillators Classification, <B>Workstream #4</B> goals and kickoff]
| Gary Giust, Ph.D.
| [https://drive.google.com/file/d/1O2iMLKKRqtesziBLPQ9PTh23Yyg_Efx2/view?usp=sharing Slides]
|-
| #16
| Feb-24, 2021
| [https://www.youtube.com/watch?v=NJRsd-1gzx8 GNSS Timing]
| Samuli Pietila
|
|-
| #15
| Feb-10, 2021
| [https://www.youtube.com/watch?v=WcWOapT_rZw Centralized GNSS Monitoring and Assurance]
| Nir Laufer
| [https://drive.google.com/file/d/11iWllqXTSWFuXR3p53nk4o4DNDCqBUa6/view?usp=sharing Slides]
|-
| #14
| Jan-27, 2021
| [https://www.youtube.com/watch?v=-uNaQENycMA Huygens and its Applications]
| Balaji Prabhakar, Ph.D.
|
|-
| #13
| Jan-13, 2021
| [https://www.youtube.com/watch?v=N9KoaOonvzM TAP 2020 Recap, 2021 Plans]
| Ahmad Byagowi, Ph.D.
| [https://drive.google.com/file/d/1H16HOlaNx4C72A3odW-Lc4_F-yrDAi_M/view?usp=sharing Slides]
|-
|
|
|
|
|-
| #12
| Dec-16, 2020
| [https://www.youtube.com/watch?v=Niu5pQ6QZ88 Chip Scaled Atomic Clocks]
| John Kitching, Ph.D.
| [https://drive.google.com/file/d/1wbp7ZlPDmCtxvjqx0dyiY8MA9jOz75bu/view?usp=sharing Slides]
 
|-
| #11
| Dec-02, 2020
| [https://www.youtube.com/watch?v=rVZbEKOE6jo Data Center PTP Profile, <B>Workstream #2</B> proposal]
| Michel Ouellette
|
 
|-
| #10
| Nov-18, 2020
| [https://www.youtube.com/watch?v=-_cdud9nSgA Computer Timekeeping and Synchronization]
| Kevin Stanton, Ph.D.
| [https://drive.google.com/file/d/12J7785mAmjNo9TsI3jZ11-QuRsDDDIIO/view?usp=sharing Slides]
 
|-
| #09
| Nov-04, 2020
| [https://www.youtube.com/watch?v=rUDHKJCI3n4 Time Sync in TSNs] (History of TSN, IEEE 802.1AS Overview)
| Hesham ElBakoury
| [https://drive.google.com/file/d/1y1ds3bGuJcNRlHgVnmjQGeXhCfZ5sy4q/view?usp=sharing Slides]
|
 
|-
| #08
| Oct-21, 2020
| [https://www.youtube.com/watch?v=cUPv1Gdvv9A Starter's guide to ptp4l]
| Maciej Machnikowski
| [https://drive.google.com/file/d/10GT5zVZTPChbUTnlSt9dbb4J0fesHBJi/view?usp=sharing Slides]
 
|-
| #07
| Oct-07, 2020
| [https://www.youtube.com/watch?v=FIuazsKx7VY&feature=youtu.be Timing card implementation]
| Ahmad Byagowi, Ph.D.
|
 
|-
| #06
| Sep-23, 2020
| [https://www.youtube.com/watch?v=Xzh3JUzbz4I Practical Use Cases of Synchronized Clocks]
| Georgi Chalakov
|
 
|-
| #05
| Sep-09, 2020
| [https://www.youtube.com/watch?v=5XJXEztSDl4 Data Center PTP Profile, <B>Workstream #2</B> goals and draft spec]
| Michel Ouellette
|
 
|-
| #04
| Aug-26, 2020
| [https://www.youtube.com/watch?v=vc1IUOw0Q4k Open Grandmaster (Open Time Server), <B>Workstream #1</B> goals and draft spec]
| Oleg Obleukhov
|
 
|-
| #03
| Aug-12, 2020
| [https://www.youtube.com/watch?v=INEbH7Q_d1c TAP Vision as well as the impact of precision oscillator noise on PTP time error]
| Dotan Levi
|
 
|-
| #02
| Jul-29, 2020
| [https://www.youtube.com/watch?v=t7eo3Aya35c Detailed Project Proposal and Discussion]
| Michel Ouellette
|
 
|-
| #01
| Jul-15, 2020
| [https://www.youtube.com/watch?v=WmMM0b38mIM Proposal to launch OCP-TAP Incubation Project]
| Ahmad Byagowi, Ph.D.
| [https://drive.google.com/file/d/1WAUl4JVaakqCY8e7yZlQiz5j6NhMkHPb/view?usp=sharing Slides] 
 
|}
 
== Presentations & Events ==
:- [https://drive.google.com/file/d/1WAUl4JVaakqCY8e7yZlQiz5j6NhMkHPb/view?usp=sharing '''TAP Vision''' | Slides]
:- [https://drive.google.com/file/d/1LC5Ld0r3U7us_jvmKeD_ZpBJaA7Kk0O4/view?usp=sharing '''TAP Presentation''' | Slides]
 
:- [https://www.opencompute.org/wiki/TAP_2022_OCP_Global_Summit 2022 '''OCP Global Summit | TAP Track''']
:- [https://www.opencompute.org/wiki/TAP_2022_OCP_Tech_Week '''2022 OCP Tech Talks | TAP Track''']
:- [https://www.opencompute.org/wiki/TAP_2021_OCP_Global_Summit 2021 '''OCP Global Summit | TAP Track''']
:- [https://drive.google.com/file/d/1RRjmGcaerDcjSKHzjfs9ob0XoldP03uQ/view?usp=sharing '''2021 GTC | Time Synchronization in Distributed Data Centers''' | Direct Video] | [https://www.nvidia.com/en-us/on-demand/session/gtcspring21-S31889/ Webpage] | [https://drive.google.com/file/d/1H8Q4S7darJyz_LTtQq_MykvzfhD_w_6I/view?usp=sharing Slides]
:- [https://www.opencompute.org/wiki/TAP_2020_OCP_Tech_Week '''2020 OCP Tech Week''' | TAP Track]
:- Impact of Oscillator Noise on PTP Time Error by SiTime | [https://drive.google.com/file/d/16EAy8Tl7SqosLlGSg5WKEA4nexWjUlAg/view?usp=sharing Slides Part 1] |  [https://drive.google.com/file/d/1Kc5JdHdd2nchxbXNGm2XyBj-pXUkHk9N/view?usp=sharing Slides Part 2]
 
=== IC Presentations ===
:- September 2nd 2021 IC Presentation [https://www.youtube.com/watch?v=JJQnNsDGEQU (Contribution of TAP DC Profile)]
:- August 5th, 2021 IC Presentation [https://www.youtube.com/watch?v=iINUNj9gIZw (Contribution of TAP Time Card and Open Time Server)]


==Recordings from Past Calls==
== TAP Media References ==
:- [https://www.youtube.com/watch?v=RvnG-ywF6_s "It's About Time (PTP on the Raspberry Pi)"] video from [https://www.youtube.com/channel/UCR-DXc1voovS8nhAvccRZhg Jeff Geerling Youtube Channel] explains the effort on getting PTP on the Raspberry Pi
:- [https://www.youtube.com/watch?v=JK3eTGkX6qY&t=286s "Why is this PCIe Card RADIOACTIVE?"] video from [https://www.youtube.com/channel/UCXuqSBlHAE6Xw-yeJA0Tunw Linus Tech Tips Youtube Channel] highlighting the TAP Time Card
:- [https://www.youtube.com/watch?v=tU0xC1ynaT8 "The most accurate Raspberry Pi clock IN THE WORLD! Can it do PTP?"] video from [https://www.youtube.com/channel/UCR-DXc1voovS8nhAvccRZhg Jeff Geerling Youtube Channel] highlighting the TAP Time Card
:- [https://www.youtube.com/watch?v=YKApDtJjXU4 "Put An Atomic Clock in Your PC - Open Source Time Card"] video from [https://www.youtube.com/channel/UCRjSO-juFtngAeJGJRMdIZw Gary Explains Youtube Channel] explains the TAP Time Card
:- [https://www.cnet.com/tech/computing/facebook-shares-its-time-card-atomic-clock-tech-to-speed-internet-services/ "Facebook shares its Time Card atomic clock tech to speed internet services"] article from C|Net
:- [https://developer.nvidia.com/blog/nvidia-supercharges-precision-timing-for-facebooks-next-generation-time-keeping/ "Supercharges Precision Timing for Facebook’s Next-Generation Time Keeping"] developer blog from NVIDIA


==Presentations & Videos==
===References & External Links===
:- TBD
:- [https://storage.googleapis.com/pub-tools-public-publication-data/pdf/45855.pdf '''Spanner''', TrueTime & The CAP Theorem] by Eric Brewer, Google
:- [https://www.usenix.org/conference/osdi20/presentation/li-yuliang '''Sundial''': Fault-tolerant Clock Synchronization for Datacenters] by Google Inc. and Harvard University
:- [http://www.dainf.cefetpr.br/~tacla/SDII/PracticalUseOfClocks.pdf Practical Uses of Synchronized Clocks in Distributed Systems] by Barbara Liskov
:- [https://ocp-all.groups.io/g/OCP-TAP/attachment/2/0/nsdi18-geng.pdf Stanford Paper]
:- [https://arxiv.org/pdf/2002.04269.pdf On Time Synchronization Issues in Time-Sensitive Networks with Regulators and Nonideal Clocks]
:- [https://drive.google.com/file/d/11MFIk9WWJ-cmjj8uWifKQnefEKvdchZE/view?usp=sharing Accurate Network Clock Synchronization at Scale]
:- [https://drive.google.com/file/d/1dpuhsC3aPNpJHD-iw0xq4K0cDjEMGG4q/view?usp=sharing Exploiting a Natural Network Effect for Scalable, Fine-grained Clock Synchronization]
:- [https://drive.google.com/file/d/1OSdZfRiGYKSntjhorKdPtoP1ewQ_yKVW/view?usp=sharing SIMON: A Simple and Scalable Method for Sensing, Inference and Measurement in Data Center Networks]
:- [https://www.opencompute.org/blog/open-compute-project-foundation-issues-new-guidelines-for-inclusiveness New Guidelines for Inclusiveness]

Latest revision as of 22:25, 22 February 2023

Screenshot 2020-07-01 16.35.12.png

Welcome[edit]

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[edit]

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[edit]

- Lead: Ahmad Byagowi, Ph.D. (OCP TAP | META)
- Incubation Committee: Elad Wind (OCP | NVIDIA)
- Communication: Lasse Johnsen (TimeBeat.app)

Workstreams[edit]

Project Objective Lead Mailing List Status
#1 Open Time Server Development of an open time server for DC and Edge systems Oleg Obleukhov &
Dotan Levi 		Submitted
#2 Data Center PTP Profile Development of a PTP Profile tailored for data center applications Michel Ouellette Submitted
#3 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 Work in progress
#4 Oscillators Classification and measuring of oscillators Gary Giust Submitted
#5 PTP Servos Design and Implement Advanced PTP Servos Alon Regev Work in progress
#6 Instrumentation and Measurement Open source instrumentation and measurement/testing tools for PTP Anand Ram &
Julian St. James 		Work in progress

Get Involved[edit]

- TAP Mailing List
- OCP Projects Calendar
- Join TAP Discord server

Documents[edit]

- Charter
- TAP GitHub
- TAP LinkedIn
- TAP Facebook
- Google Drive Document Repository


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[edit]

- Wednesdays at 11am PST, starting on July 15th, 2020. Repeats every 2 weeks following that

Join the meeting from your computer, tablet or smartphone: 

https://meet.goto.com/tap

Dial in: 

United States (Toll Free): +1 877 309 2073                                        
United States:             +1 571 317-3129                                        
Access Code:                565-185-493

Upcoming Calls[edit]

Date Topics Speakers
#73 May-24, 2023 Research on PTP in Smart Grid at NIST Ya-Shian Li-Baboud
#72 May-10, 2023 PTP Track Hound v2 - The central monitoring hub for timing-critical infrastructure Thomas Behn
#71 Apr-26, 2023 PTP based FbClock vs HLC Lu Pan
#70 Arp-12, 2023 PTM Round Table K. Stanton, W. Wasko, K. Bryant, L. Johnsen
#69 Mar-29, 2023 COTS based Jitterbug Timing Measurement System Myrick Wilbur, Ph.D.
#68 Mar-15, 2023 Integrated acoustic resonators in commercial Fin-FET technology Dana Weinstein, Ph.D.
#67 Mar-01, 2023 Timing Resilience and Security at the Core of GNSS Technology Gustavo Lopez

Recordings from Past Calls[edit]

Date Topics Speakers Slides
#66 Feb-15, 2023 Trading off Consistency and Availability in Cyber-Physical Systems Edward A. Lee, Ph.D. Slides
#65 Feb-01, 2023 SyncESMC - an ITU-T G.781 Multi-Clock ESMC Implementation Vipin Sharma Slides
#64 Jan-18, 2023 Overview of Timestamping and Synchronization Infrastructure at the Deutsche Boerse Georg Sauthoff, Ph.D. Slides
#63 Jan-04, 2023 Time & Frequency Measurements with Picosecond Streaming Time-to-Digital Converters Helmut Fedder, Ph.D. Slides
#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
#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
#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[edit]

- TAP Vision | Slides
- TAP Presentation | Slides
- 2022 OCP Global Summit | TAP Track
- 2022 OCP Tech Talks | TAP Track
- 2021 OCP Global Summit | TAP Track
- 2021 GTC | Time Synchronization in Distributed Data Centers | Direct Video | Webpage | Slides
- 2020 OCP Tech Week | TAP Track
- Impact of Oscillator Noise on PTP Time Error by SiTime | Slides Part 1 | Slides Part 2

IC Presentations[edit]

- September 2nd 2021 IC Presentation (Contribution of TAP DC Profile)
- August 5th, 2021 IC Presentation (Contribution of TAP Time Card and Open Time Server)

TAP Media References[edit]

- "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[edit]

- 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
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