Meeting Notes

News

• Github Actions:
• Working successfully.
• We have a private conda repository and shared file system on AFS.
• Trying to use ssh-copy in actions.
• Pyroot Issues:
• Under control, was another thread safety issue.
• Discussion ongoing with Vim about cppyy's safety.
• Issue fixed in ROOT, CI suite is green.
• Sporadic failures in DataFrame, another thread safety issue. Opened a PR, CI is green.

Shifter:

• Nothing much to report.

TMVA:

• Student started working but is busy with exams this week.

PPP:

• Sebastian Bromer from KIT: Software for analysis called Crown.
• 10 analysis groups using this framework, based on RDataframe.
• Detailed overview provided.
• Interesting Note:
  • Cling can JIT hundreds of template arguments in a few minutes.
  • TODO: Workaround with snapshots.

RBatchGenerator: End of internship presentation, Kristupas:

• Filter Naming: Should be named.
• Chunking and Batching:
• Tensorflow: Jitting takes a lot of time and cannot be jitted after a certain value.
• TODO: Testing and performance evaluation.
• Questions:
• Jacob: Should we manually specify the sizes?
• Max vector sizes: In RDataframe, vectors can be of any size. We pad them to be the same size.
• JonasR: Usage of batch generators for ML training, preprocessing with RDataframe, is it worth it?
• Vincenzo: Explicit request to have RBatchGenerator as part of the analysis framework.
• Remark: Vassil: General compiler limitation: there's a ulimit flag.

Danilo

• Preparing for release, nothing to add at this point.

Round Table

Vincenzo

• Opened 2 PRs, preparing for release.

Vassil

• Released Clad, merged a pull request.

Serguey

• Preparing for release.

Olivier

• Forum updates, release notes update, closed remaining JIRA reports.
• 2 Pull requests: one done, second pending.

Monica

• Opened a PR.
• Addressing a couple of old issues.
• Preparing a presentation for the next SYCLOPs meeting.

Marta

• Catching up with ongoing activities.
• Track convener, selecting abstracts for the 17th of June.

Lorenzo

• Preparing for release.

JonasR

• Clad release.
• Worked on Roofit and ATLAS benchmarks for ICHAP.
• Merged a PR in Roofit.
• Addressed action items from last week for release.
• Pyroot: fixed a memory leak.
• Minor build system improvements for release.

Jacob

• Fixed bugs related to variants and optional.
• Addressed a weird 4-byte padding issue.
• Volunteers from LLMU are interested in running tests.

Florine

• Snapshotting RDF to RNTuple, initial working version.
• Loopmanager needs to be initialized.

Devajith

• Worked on LLVM18 rebase, 52 patches on top of LLVM currently.

Bertrand

• Implemented support for Ninja on Windows, expected to be faster.
• Encountered a problem building in debug mode.

Adrian

• Working on graphics test suite, adding more functionalities.