HSF Coordination Meeting #222, 3 February 2022

Present/Contributing: Graeme Stewart, Michel Jouvin, Andrea Valassi, Benedikt Hegner, David Lange, Dorothea Vom Bruch, Eduardo Rodrigues, Kevin Pedro, Ben Morgan, Kyle Knoepfel, Wouter Deconinck, Alexander Moreno, Matti Kortelainen, Markus Diefenthaler, Nicole Skidmore, Oksana Shadura, Krzysztof Genser, Marc Paterno, Liz Sexton-Kennedy, Stephan Hageboeck, Paul Laycock, Michael Wilkinson, Mark Neubauer, Pere Mato, Simone Campana, Alessandra Forti, Kevin Pedro, Matti Kortelainen, Stefan Roiser, Stephan Hageboeck, Markus Schulz

News, general matters, announcements

Analysis Facilities Activity Proposal

We received a proposal for a new activity area:

With the email, we put forward a proposal for a new HSF Activity Area on the topic of analysis facilities called the “Analysis Facilities (AF) Forum.” Please see the google doc at


for a description of the activity, which would also serve as a draft version of the AF Forum web page to be added to


if approved by HSF Coordination.

Diego Ciangottini (INFN, Perugia U, CMS) Lukas Heinrich (TUM, ATLAS) Nicole Skidmore (Manchester, LHCb)

(in CC) have kindly agreed to coordinate the AF Forum activity. We hope that this initiative to create a community platform to discuss analysis facilities is well received by the coordination team and we can proceed with next steps in planning as an HSF Activity.

best regards, Mark, Oksana, Alex, Diego, Lukas and Nicole


Meeting agreed to approve the formation of this group and, like all HSF activities, to review later to see if it is still the optimal way to organise our efforts. We wish the proponents every success!

Workshops in 2022

Analysis Ecosystems

Had a first meeting last week (https://indico.cern.ch/event/1120577/) of organisers. Started to gather ideas for the format of the workshop and topics to cover.

Proposed dates are narrowed to 23-25 May at IJCLab in Orsay. Covid means f2f cannot be assured even then. Need to gauge community sentiment on this, so we are also going to have a short survey.

Second organisers meeting today at 17h. Aim to get an announcement out very soon!

Simulation on GPU

Dates have been fixed to 3-7 May, virtual format nominally taking place 15-19h each day in European TZ.

Review progress in two R&D activities, AdePT and Celeritas, try to find future directions and synergies.

Indico: https://indico.cern.ch/event/1123314/

HSF Input to Software Communities Paper

Dan Katz invited Graeme, for the HSF, to contribute to a paper on experiences forming scientific software communities.

Draft text has been prepared as a Google Doc, to which a number of people already gave feedback - thanks! Covers the motivation and formation of the HSF, our activities, what challenges still remain.

If you have comments please let Graeme know or make them directly in the Google Doc this week.

Snowmass Input

There is a proposal that has been put forward to write a concise document for Snowmass via the WLCG, to which the HSF can contribute - this would be a high-level summary of computing and software issues that highlights key messages. Liz, Heidi and Graeme have been involved in discussing this and an abstract has been proposed to the WLCG MB.

Propose a small writing team who will work on the first draft, then circulate the text.

Google Summer of Code

HSF call for proposals was sent a few weeks ago. Deadline for project proposals is Feb 21.

Working Group Updates

Detector Simulation

No update since last time, other than planning for this year. May will be taken up by the “Simulation on GPU” meeting mentioned above.

Reconstruction and Software Triggers

Topical meeting on 4D reco algorithms likely on February 23rd (to be confirmed with second speaker)

Software Tools and Packaging

We have a meeting planned for Feb 8 to begin discussion of how we (the ST&P WG) can beneficially cooperate with the HSF Training WG.

Event Generators

Working on Snowmass submission.


No report since last time. First order of business is settling on meeting schedule.

Software Training

HEP C++ Course and Hands-on Training

Next course planned for 15-17 March, https://indico.cern.ch/event/1119339/. The course content has been split into two parts now. This course will teach “the Essentials”. An “Advanced” course is planned for later this year.

Teaching will be done this time by Stephan Hageboeck (IT/SC) and Bernhard Gruber (EP/SFT)

Registration opens on 14 Febrary 9am CET. As usual we offer 75 places.

Other Interest and Activity Areas


There are some slides posted that give a general overview of some of our other HSF activities (delayed from last week).

Compute Accelerator Forum

Meeting next week, with an update from the HEP-CCE project:

Software and Computing Roundtable

Meeting next week, discussion on “Programming Languages”:


We still need to conclude on the HepMC3 re-licensing!

Conditions Databases

We now have a new page for this new activity on the HSF website! Kick-off meeting to follow.

Differentiable Computing

This group has come back to life a bit - they will have one of their informal “campfire” meetings tomorrow at 16h CERN time: https://indico.cern.ch/event/1123051/

We can put back the HSF Activity page in this case.


2022 Planning Summary

Based on the discussions and presentations that we had, there is a summary prepared for the HSF website as a draft PR. Please take a look and suggested changes, additions, etc.

Next Meeting

Next coordination meeting is scheduled for 17 February.