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: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 | :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 | 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. | 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. | 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. | ||
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==Project Leadership== | ==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 | :- Incubation Committee: [mailto:elad.wind@ocproject.net Elad Wind] (OCP / NVIDIA) | ||
==Workstreams== | ==Workstreams== | ||
{| class="wikitable | {| class="wikitable" | ||
|- | |- | ||
! | ! | ||
! Project !! Objective !! Lead !! Mailing List !! Status | ! 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 # | |||
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Open-Time-Server Open Time Server] | | [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 | | Development of an open time server for DC and Edge systems | ||
| [mailto: | | [mailto:leoleovich@fb.com Oleg Obleukhov] & <br> [mailto:dotanl@nvidia.com Dotan Levi] | ||
| | | | ||
| [https://www.opencompute.org/contributions Submitted] | | [https://www.opencompute.org/contributions Submitted] | ||
|- | |- | ||
| [https://www.opencompute.org/wiki/ | | [https://www.opencompute.org/wiki/TAP_PTP_Profile #2] | ||
| [https://www.opencompute.org/wiki/TAP_PTP_Profile Data Center PTP Profile] | | [https://www.opencompute.org/wiki/TAP_PTP_Profile Data Center PTP Profile] | ||
| Development of a PTP Profile tailored for data center applications | | Development of a PTP Profile tailored for data center applications | ||
| [mailto:michelouellette@ | | [mailto:michelouellette@fb.com Michel Ouellette] | ||
| | | | ||
| [https://www.opencompute.org/contributions Submitted] | | [https://www.opencompute.org/contributions Submitted] | ||
|- | |- | ||
| [https://www.opencompute.org/wiki/TAP_Precision_Time_APIs # | | [https://www.opencompute.org/wiki/TAP_Precision_Time_APIs #3] | ||
| [https://www.opencompute.org/wiki/TAP_Precision_Time_APIs Precision Time APIs] | | [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 | | Time APIs to disseminate the time error (error bound) and bring accurate time to the user space | ||
| [mailto:gemicha@gmail.com Georgi Chalakov] | | [mailto:gemicha@gmail.com Georgi Chalakov] | ||
| [https://ocp-all.groups.io/g/OCP-TAP-APIs OCP-TAP-APIs] | | [https://ocp-all.groups.io/g/OCP-TAP-APIs OCP-TAP-APIs] | ||
| | | Work in progress | ||
|- | |- | ||
| [https://www.opencompute.org/wiki/TAP_Oscillators # | | [https://www.opencompute.org/wiki/TAP_Oscillators #4] | ||
| [https://www.opencompute.org/wiki/TAP_Oscillators Oscillators] | | [https://www.opencompute.org/wiki/TAP_Oscillators Oscillators] | ||
| Classification and measuring of oscillators | | Classification and measuring of oscillators | ||
| [mailto:ggiust@sitime.com Gary Giust | | [mailto:ggiust@sitime.com Gary Giust] | ||
| | | | ||
| [https://www.opencompute.org/contributions Submitted] | | [https://www.opencompute.org/contributions Submitted] | ||
|- | |- | ||
| [https://www.opencompute.org/wiki/TAP_PTP_Servos # | | [https://www.opencompute.org/wiki/TAP_PTP_Servos #5] | ||
| [https://www.opencompute.org/wiki/TAP_PTP_Servos PTP Servos] | | [https://www.opencompute.org/wiki/TAP_PTP_Servos PTP Servos] | ||
| Design and Implement Advanced PTP Servos | | Design and Implement Advanced PTP Servos | ||
| [mailto:alon.regev@keysight.com Alon Regev] | | [mailto:alon.regev@keysight.com Alon Regev] | ||
| | | | ||
| | | Getting Started | ||
|- | |- | ||
| [https://www.opencompute.org/wiki/TAP_Instrumentation # | | [https://www.opencompute.org/wiki/TAP_Instrumentation #6] | ||
| [https://www.opencompute.org/wiki/TAP_Instrumentation Instrumentation and Measurement] | | [https://www.opencompute.org/wiki/TAP_Instrumentation Instrumentation and Measurement] | ||
| Open source instrumentation and measurement/testing tools for PTP | | Open source instrumentation and measurement/testing tools for PTP | ||
| [mailto:anand.ram@calnexsol.com Anand Ram] | | [mailto:anand.ram@calnexsol.com Anand Ram] & <br> [mailto:julianstj@fb.com Julian St. James] | ||
| | | | ||
| Work in progress | | Work in progress | ||
|- | |- | ||
| | | '''#7''' | ||
| | | Time Sync Reliability | ||
| | | Fault-tolerance and UTC-traceability | ||
| [mailto: | | [mailto:kumargautam@google.com Gautam Kumar] & <br> [mailto:yuliangli@google.com Yuliang Li] | ||
| | | | ||
| | | Getting Started | ||
|} | |} | ||
==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] | ||
==Documents== | ==Documents== | ||
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{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
! | ! Worstream !! Name !! Format !! Version !! Date | ||
|- | |- | ||
| rowspan=3 style="text-align:center;" |'''#1''' | | rowspan="3" style="text-align:center;" |'''#1''' | ||
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Open-Time-Server Open Time Server] | | [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Open-Time-Server Open Time Server] | ||
| Reference Architecture | | Reference Architecture | ||
| | | v1 | ||
| July 28, 2021 | | July 28, 2021 | ||
|- | |- | ||
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Time-Card Time Card] | | [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Time-Card Time Card] | ||
| Spec and design package | | Spec and design package | ||
| | | v1 | ||
| July 28, 2021 | | July 28, 2021 | ||
|- | |- | ||
| [https://github.com/opencomputeproject/Time-Appliance-Project/ | | [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Software TAP Software] | ||
| Software | | Software | ||
| | | | ||
| July 28, 2021 | | July 28, 2021 | ||
|- | |- | ||
| | | style="text-align:center;" | '''#2''' | ||
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/DC-PTP-Profile Data Center PTP Profile] | |||
| Spec | |||
| [https:// | | v1 | ||
| | |||
| | |||
| August 31, 2021 | | August 31, 2021 | ||
|- | |- | ||
|} | |} | ||
==Regular Project Calls== | ==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: | Join the meeting from your computer, tablet or smartphone: | ||
https://global.gotomeeting.com/join/565185493 | |||
Dial in | Dial in: | ||
United States (Toll Free): +1 877 309 2073 | |||
United States: +1 571 317-3129 | |||
Access Code: 565-185-493 | |||
===Upcoming Calls=== | ===Upcoming Calls=== | ||
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|- | |- | ||
| # | | #53 | ||
| <font color="green"> | | <font color="green">August-10, 2022</font> | ||
| <font color="green"> | | <font color="green">Graham: Synchronizing Clocks by Leveraging Local Clock Properties</font> | ||
| <font color="green"> | | <font color="green">Ali Najafi</font> | ||
|- | |- | ||
|- | |- | ||
| # | | #52 | ||
| <font color="green"> | | <font color="green">July-27, 2022</font> | ||
| <font color="green"> | | <font color="green">T.B.D.</font> | ||
| <font color="green"> | | <font color="green">Manoj Sastry</font> | ||
|- | |- | ||
|- | |- | ||
| #51 | |||
| <font color="green">July-13, 2022</font> | |||
| <font color="green">Next Generation PTP Aware Switches</font> | |||
| <font color="green">Barak Gafni</font> | |||
|- | |- | ||
|- | |- | ||
| # | | #50 | ||
| | | <font color="green">June-29, 2022</font> | ||
| | | <font color="green">Signal Intergirity Considerations for High Speed Clocking</font> | ||
| <font color="green">Srinivas Venkatraman</font> | |||
|- | |- | ||
|- | |- | ||
| # | | #49 | ||
| | | <font color="green">June-15, 2022</font> | ||
| | | <font color="green">T.B.D.</font> | ||
| | | <font color="green">Dhiman Chowdhury</font> | ||
|- | |- | ||
|- | |- | ||
| # | | #48 | ||
| | | <font color="green">June-1, 2022</font> | ||
| <font color="green">Advanced TimeCard and SyncModule for datacenter synchronization</font> | |||
| <font color="green">Nir Laufer</font> | |||
| | |||
| | |||
|- | |- | ||
|} | |} | ||
=== | ===Recordings from Past Calls=== | ||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
! | |||
! Date !! Topics !! Speakers !! Slides | |||
| | |||
| | |||
|- | |- | ||
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|- | |- | ||
| #46 | | #46 | ||
| May- | | May-4, 2022 | ||
| [https://www.youtube.com/watch?v=EWiCwTaiM1A Optical Timekeeping Efforts at NIST] | | [https://www.youtube.com/watch?v=EWiCwTaiM1A Optical Timekeeping Efforts at NIST] | ||
| Jeff Sherman, Ph.D. | | Jeff Sherman, Ph.D. | ||
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|- | |- | ||
| #40 | | #40 | ||
| Feb- | | Feb-9, 2022 | ||
| [https://www.youtube.com/watch?v=CAyN3RtO51A Getting Precision Time Synchronization to End Users] | | [https://www.youtube.com/watch?v=CAyN3RtO51A Getting Precision Time Synchronization to End Users] | ||
| Julian St. James | | Julian St. James | ||
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| Tyler Reid, Ph.D. | | Tyler Reid, Ph.D. | ||
| [https://drive.google.com/file/d/1HhNBkhQsh2ucdlxfKtlnPk7dhp4yNlpX/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1HhNBkhQsh2ucdlxfKtlnPk7dhp4yNlpX/view?usp=sharing Slides] | ||
|- | |- | ||
| #38 | | #38 | ||
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| Daniel Suster | | Daniel Suster | ||
| [https://drive.google.com/file/d/1PUiHj8_dsOOd6L3VnraldWSkbbajCXAF/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1PUiHj8_dsOOd6L3VnraldWSkbbajCXAF/view?usp=sharing Slides] | ||
|- | |||
| | | | ||
| | |||
| | |||
| | |||
|- | |- | ||
| #37 | | #37 | ||
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| Christopher Hall | | Christopher Hall | ||
| [https://drive.google.com/file/d/1OKAOjRzZHlaNoHE7USXpOyIBU0_1EytU/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1OKAOjRzZHlaNoHE7USXpOyIBU0_1EytU/view?usp=sharing Slides] | ||
|- | |- | ||
| #36 | | #36 | ||
| Dec- | | Dec-1, 2021 | ||
| [https://www.youtube.com/watch?v=oPTIp3qE2Gs Application of Physical Layer Synchronization/Syntonization in a Data Center Environment] | | [https://www.youtube.com/watch?v=oPTIp3qE2Gs Application of Physical Layer Synchronization/Syntonization in a Data Center Environment] | ||
| Med Belhadj, Ph.D. | | Med Belhadj, Ph.D. | ||
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| Gary Guist, Ph.D. | | Gary Guist, Ph.D. | ||
| [https://drive.google.com/file/d/1k9ZTTYAqdyviUKSJd_JmM8CH3LKBPf5w/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1k9ZTTYAqdyviUKSJd_JmM8CH3LKBPf5w/view?usp=sharing Slides] | ||
|- | |- | ||
|#34 | |#34 | ||
| Nov- | | Nov-3, 2021 | ||
| [https://www.youtube.com/watch?v=coa6OkTbD5M Time Service for the Virtual Entity] | | [https://www.youtube.com/watch?v=coa6OkTbD5M Time Service for the Virtual Entity] | ||
| Dotan Levi | | Dotan Levi | ||
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| #32 | | #32 | ||
| Oct- | | Oct-6, 2021 | ||
| [https://www.youtube.com/watch?v=5jbUJeHaRBU Validating PTP follower clock accuracy] | | [https://www.youtube.com/watch?v=5jbUJeHaRBU Validating PTP follower clock accuracy] | ||
| Alon Regev | | Alon Regev | ||
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|- | |- | ||
| #30 | | #30 | ||
| Sep- | | Sep-8, 2021 | ||
| [https://www.youtube.com/watch?v=vj2nM9N7F9g Miniaturized Rubidium Oscillator With The Lowest SWAP Based on Double Resonance] | | [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 | | Christian S. Ph.D., Stavros M. Ph.D., Jean-Arnold C | ||
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|- | |- | ||
| #23 | | #23 | ||
| Jun- | | Jun-2, 2021 | ||
| Introduction to MAC and CSACs | | Introduction to MAC and CSACs | ||
| Robert Lutwak, Ph.D. | | Robert Lutwak, Ph.D. | ||
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|- | |- | ||
| #21 | | #21 | ||
| May- | | May-5, 2021 | ||
| [https://www.youtube.com/watch?v=pqTsCFM6lCo White Rabbit: An Accurate Time and Frequency Transfer over Ethernet] | | [https://www.youtube.com/watch?v=pqTsCFM6lCo White Rabbit: An Accurate Time and Frequency Transfer over Ethernet] | ||
| Maciej Lipinski, Ph.D. | | Maciej Lipinski, Ph.D. | ||
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|- | |- | ||
| #19 | | #19 | ||
| Apr- | | Apr-7, 2021 | ||
| [https://www.youtube.com/watch?v=rSsSAlP2eIA Clock and Oscillator Statistics and Characterization Techniques] | | [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] | | [https://drive.google.com/file/d/1V8zDETnZX_PjxGYog8bKgokKqnUjR95X/view?usp=sharing Slides] | ||
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| [https://drive.google.com/file/d/1H16HOlaNx4C72A3odW-Lc4_F-yrDAi_M/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1H16HOlaNx4C72A3odW-Lc4_F-yrDAi_M/view?usp=sharing Slides] | ||
|- | |- | ||
| | |||
| | | | ||
| | |||
| | |||
|- | |- | ||
| #12 | | #12 | ||
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|- | |- | ||
| #11 | | #11 | ||
| Dec- | | Dec-2, 2020 | ||
| [https://www.youtube.com/watch?v=rVZbEKOE6jo Data Center PTP Profile, <B>Workstream #2</B> proposal] | | [https://www.youtube.com/watch?v=rVZbEKOE6jo Data Center PTP Profile, <B>Workstream #2</B> proposal] | ||
| Michel Ouellette | | Michel Ouellette | ||
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|- | |- | ||
| #09 | | #09 | ||
| Nov- | | Nov-4, 2020 | ||
| [https://www.youtube.com/watch?v=rUDHKJCI3n4 Time Sync in TSNs] (History of TSN, IEEE 802.1AS Overview) | | [https://www.youtube.com/watch?v=rUDHKJCI3n4 Time Sync in TSNs] (History of TSN, IEEE 802.1AS Overview) | ||
| Hesham ElBakoury | | Hesham ElBakoury | ||
| [https://drive.google.com/file/d/1y1ds3bGuJcNRlHgVnmjQGeXhCfZ5sy4q/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1y1ds3bGuJcNRlHgVnmjQGeXhCfZ5sy4q/view?usp=sharing Slides] | ||
| | |||
|- | |- | ||
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|- | |- | ||
| #07 | | #07 | ||
| Oct- | | Oct-7, 2020 | ||
| [https://www.youtube.com/watch?v=FIuazsKx7VY&feature=youtu.be Timing card implementation] | | [https://www.youtube.com/watch?v=FIuazsKx7VY&feature=youtu.be Timing card implementation] | ||
| Ahmad Byagowi, Ph.D. | | Ahmad Byagowi, Ph.D. | ||
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|- | |- | ||
| #05 | | #05 | ||
| Sep- | | Sep-9, 2020 | ||
| [https://www.youtube.com/watch?v=5XJXEztSDl4 Data Center PTP Profile, <B>Workstream #2</B> goals and draft spec] | | [https://www.youtube.com/watch?v=5XJXEztSDl4 Data Center PTP Profile, <B>Workstream #2</B> goals and draft spec] | ||
| Michel Ouellette | | Michel Ouellette | ||
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|} | |} | ||
== Presentations & | == Presentations & Videos == | ||
:- [https://drive.google.com/file/d/1WAUl4JVaakqCY8e7yZlQiz5j6NhMkHPb/view?usp=sharing '''TAP Vision''' | Slides] | :- [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://drive.google.com/file/d/1LC5Ld0r3U7us_jvmKeD_ZpBJaA7Kk0O4/view?usp=sharing '''TAP Presentation''' | Slides] | ||
:- [https://www.opencompute.org/wiki/TAP_2021_OCP_Global_Summit#TAP_Track_Sessions 2021 '''OCP Global Summit | TAP Track'''] | |||
:- [https://drive.google.com/file/d/1RRjmGcaerDcjSKHzjfs9ob0XoldP03uQ/view?usp=sharing '''GTC 2021: Time Synchronization in Distributed Data Centers''' | Video] | [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)] | |||
:- | |||
:- | |||
== TAP Media References == | == TAP Media References == | ||
:- [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=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=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 |