Tango Polling Loop SIG Meeting

14 Apr 2026, 09:00 → 16 Apr 2026, 17:00 Europe/Berlin

MAX IV

Anton Joubert (MAX IV Laboratory), Benjamin Bertrand (MAX IV Laboratory)

Tango Polling Loop: A Special Interest Group Workshop

Date: 14 to 16 April 2026
Location: MAX IV Laboratory, Lund, Sweden

The SIG workshop will also be accessible online: https://lu-se.zoom.us/j/61182416731 (password will be given via email and mattermost)

Join us for an open discussion workshop dedicated to the Tango Device Polling Loop - improvements to the algorithm, API, etc.
This is a chance for the community to exchange ideas, align on priorities, and share feedback that will guide future development.

 

Registration will close on the 30th of March.

For a general explanation of device polling: https://tango-controls.readthedocs.io/en/latest/Explanation/polling.html

See this issue for more details of topics: https://gitlab.com/tango-controls/cppTango/-/issues/1551

 

Online discussions related to planning happen in mattermost: https://mattermost.hzdr.de/tango-controls/channels/sig-meetings

Tuesday, 14 April

1 Welcome

Speakers: Anton Joubert (MAX IV Laboratory), Benjamin Bertrand (MAX IV Laboratory)

2 Where are we

Current polling loop algorithms

Speaker: Reynald Bourtembourg (ESRF)

Tango Polling.pptx

Break: Fika

3 Deficiencies

Institutes get a few minutes to list their issues

• SKAO
  -- https://gitlab.com/tango-controls/cppTango/-/work_items/1554 (part of description)
  -- https://gitlab.com/tango-controls/cppTango/-/work_items/1551#note_2992430576
• MAX IV
  -- https://gitlab.com/tango-controls/cppTango/-/work_items/1541
  -- https://gitlab.com/tango-controls/cppTango/-/work_items/1600
  -- https://gitlab.com/tango-controls/cppTango/-/work_items/1552
• Elettra
  -- New architecture proposal: https://gitlab.elettra.eu/lorenzo.pivetta/polling-sig/-/blob/main/proposal-class-level-async-poller.md

Speaker: Thomas Ives (Observatory Sciences Ltd)

skao-polling-woes.pdf

Tango Polling at ALBA Synchrotron.pdf

tango_polling_maxiv.pptx

Break: Lunch

4 Example implementations

Speaker: Thomas Ives (Observatory Sciences Ltd)

5 Literature review: scheduling algorithms

Speaker: Thomas Braun (byte physics e.K.)

2026-04-14-scheduling-algorithms-thomas-braun.pdf

6 Discuss algorithm options

Round-table discussion

Speaker: Anton Joubert (MAX IV Laboratory)

scheduling-algorithms.html

Break: Fika

7 Discuss design options

Configurability, backwards compatibility, pluggability, etc.

-> converge on solution and roadmap

8 Day 1 recap

Wednesday, 15 April

9 Day 1 follow-ups & agenda review

10 Design of the new data collector/producer-consumer mechanism

Break: Fika

11 Design of the new data collector/producer-consumer mechanism (cont.)

Collector architecture.pdf

Break: Lunch

12 Scheduler algorithms and polling loop improvements

Break: Fika

13 Scheduler algorithms and polling loop improvements (cont.)

14 Day 2 recap

Thursday, 16 April

15 Day 2 follow-ups & agenda review

16 Scheduler algorithms and polling loop improvements (cont.)

Break: Fika

17 Mocking time, incl. polling loop, for testability

How can we make the code more testable without having to wait in "real time" for time-based events to happen?

18 Review cppTango polling work items

Review the list we set up before the meeting

https://gitlab.com/tango-controls/cppTango/-/work_items/1551

Break: Lunch

19 New / additional items

Break: Fika

20 Review all action items

21 Closing remarks & next steps

Tango Polling Loop SIG - minutes.pdf