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==Instrumentation and Measurement - Workstream #6==
==Instrumentation and Measurement - Workstream #6==
[https://www.opencompute.org/wiki/Time_Appliance_Project Back to Time Appliances Project's wiki]
[https://www.opencompute.org/wiki/Time_Appliance_Project Time Appliances Project]


==Objective==
==Objective==
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:- Lead: [mailto:anand.ram@calnexsol.com Anand Ram] (Calnex)
:- Lead: [mailto:anand.ram@calnexsol.com Anand Ram] (Calnex)
:- Lead: [mailto:julianstj@fb.com Julian St James] (Meta)
:- Lead: [mailto:julianstj@fb.com Julian St James] (Meta)
==Meeting invite==
8:00am - 8:30am PST Second Thursday every month: [https://teams.microsoft.com/dl/launcher/launcher.html?url=%2F_%23%2Fl%2Fmeetup-join%2F19%3Ameeting_OGE1MzNkMGMtZDRjMS00YzFiLTg4MTAtZjcxNzEwYzI2ODIy%40thread.v2%2F0%3Fcontext%3D%257b%2522Tid%2522%253a%2522fbb4e2fb-f802-4d55-beca-b7149551e928%2522%252c%2522Oid%2522%253a%2522cff27e02-befc-4437-98d5-96034f77b90c%2522%257d%26anon%3Dtrue&type=meetup-join&deeplinkId=5f0bbd41-a286-4e8b-b786-5162812cfe21&directDl=true&msLaunch=true&enableMobilePage=true&suppressPrompt=true Launch Teams Meeting Link]


==Recording from Past Calls==
==Recording from Past Calls==
[https://drive.google.com/file/d/1Ctz2eWt2e71y9ChquZGdu6Fc9H5PQZZs/view?usp=sharing 20 Jan 2022]
[https://drive.google.com/file/d/1Ew3LOo-vUEA_KcP0A_MnnkuHmVzykC6V/view?usp=sharing 27 Jan 2022]
[https://drive.google.com/file/d/1iBY6HX9EA6CKG3QWYw7ZwfNMUUyketMG/view?usp=sharing 24 Feb 2022]
[https://drive.google.com/file/d/1xPt-CWZEpcoVGmgpRnG8ccebdfoZ46vq/view?usp=sharing 23 Jun 2022]
[https://drive.google.com/file/d/1uO8RtSFO5l7xTY6mTIrsImsP2iaRvyNC/view?usp=sharing 27 Oct 2022 PTP Simulator Demo]
[https://drive.google.com/file/d/1sZzXC85Pl4viJoBF0x6Y_eYNiCe-YtY-/view?usp=sharing 10 Nov 2022 Monitoring Discussion]
[https://drive.google.com/file/d/1Cx59jrTRm4alglwwRJbUdfuyTsHQAxM8/view?usp=sharing 11 May 2023 PTM Testing Kickoff]


[https://drive.google.com/file/d/1yQ3cyI7ld8FdiqXQYEe6gZgZzFM_qO5S/view?usp=sharing 28 Sep 2023]
=Hardware Roadmap=
Initial Proof of Concept based on Time Card for PPS measurement


[https://drive.google.com/file/d/1TmXMF-VchMt06UzEo8Ot36kKkZkriWYD/view?usp=sharing 8 Feb 2024 Monitoring & Measurement Discussion]
=Software=
Integrate Time Card timestamping for data collection and export


==Hardware Roadmap==
==Potential Future Solutions==


{| class="wikitable"
{| class="wikitable"
|-
!
! Design !! Objective
|-
| '''#1'''
| Time Card based PPS measurement
| Scaleable use of the Time Card in a generic server to perform up to 4 PPS measurements
|-
|-
|}
==Software==
{| class="wikitable"
|-
!
!
! Design !! Objective  
! Core Hardware !! Objective !! Status
|-  
|-  
| '''#1'''
| '''#1'''
| Time Card based PPS measurement
| TDC
| Interface with Time Card driver and export PPS measurement data in a useful format
| Small, cheap, and low power use-case
|-
|-
|}


==Potential Future Hardware Solutions==


{| class="wikitable"
1. TDC based design, targeting small and cheap use-case.
|-
2. PTM based design, to synchronize multiple measurement daughter cards with a high stability source over PCIe
!
3. UWB based design, targeting locations where GPS is not available at point of measurement
! Core Hardware !! Objective
4. DPLL based design, targeting non-FPGA use case
|-
| '''#1'''
| TDC
| Small, cheap, and low power use-case
|-
|-
| '''#2'''
| PTM controller
| A PCIe based daughter card that can be synchronized with a high stability source (Time Card) over PCIe to scale PPS measurements
|-
|-
| '''#3'''
| UWB
| A method for distributing GPS and time to areas where measurements are made, but GPS is not available
|-
|-
| '''#4'''
| DPLL
| A discrete design based around a DPLL , removing the need for an FPGA
|-
|}
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