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    Key4hep Discussion

    → Europe/Zurich
    32/S-C22 (CERN)

    32/S-C22

    CERN

    17
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    SFT/Key4hep Meeting
    ===

    Attendees: Andre, Swathi, Juan, Leonhard, Mateusz, 

    Apologies: Benedikt, 

    Date: April 23, 2024

    ## News

    ## Summerstudents
    * Summerstudent: Are PCs there for the summer students? Do we need to order new ones?
        * Juan/Swathi have a PC, Lorenzo V's PC, need one more? 
        * Mateusz will check w/ Benedikt
        * Screens: Lorenzo V (2x), +1 in Juan's office
        * Leonhard told Yasemin weeks ago about needing a more up-to-date PC

    * Dates:
        * Katerina Kostova: 01/07 to 27/09
        * Giulia Gianoli: 01/07 to 27/09
        * Joshua Ott: Dates TBC
        
    ## Round The Table

    ### Andre

    * Fixed last issue for DD4hep continuous integration builds 
    * Reviewed some PRs

    ### Swathi

    * Porting DDSimpleMuonDigi

    ### Juan

    * [x] Fixed bug in podio, needed for Overlay to work
        * [x] Fixing some other issues along the way
    * Ongoing issues with madgraph when using pythia8 from the stack
    * Updates to the [k4FWCore PR](https://github.com/key4hep/k4FWCore/pull/173) 

    ### Mateusz

    * Presentation in the Gaudi Developer meeting
        * Inspecting memory footprint might not be necessary, more time maybe be spend converting Structs-Of-Arrays to Array-of-Structs or vice versa
        * To be discussed with Benedikt
    * Waiting for instructions how to run LHCb workloads
    * Have meeting with Attila K. on Friday
    * Looking at: Fibres, Green Threads, Co-routines
        * ATLAS looking into running selected Algorithms on fibers
    * Oleksandr: Obtained logs from the scheduler to see what it did

    ### Leonhard

    * [CLDConfig refactor Part 2](https://github.com/key4hep/CLDConfig/pull/30)
    * [MarlinWrapper Verbositites](https://github.com/key4hep/k4MarlinWrapper/pull/182)
    * std::array in RDataFrame: 
        * [our issue](https://github.com/key4hep/EDM4hep/issues/262)
        * [ROOT issue](https://github.com/root-project/root/issues/14790)
    * More efficient detector construction in OpenDataDetector:
        * [(nested) assemblies](https://gitlab.cern.ch/acts/OpenDataDetector/-/merge_requests/55)
        * [duplicated solids](https://gitlab.cern.ch/acts/OpenDataDetector/-/merge_requests/43)

    ## AOB

    * Gentner Day, April 24

    ## Next Meeting

    April 30, 2024

    ## TODO

    * [ ] Set MARLIN_DEBUG for Marlin and processors?

    There are minutes attached to this event. Show them.
      • 13:00 → 13:55
        Round The Table 55m
        Speakers: Andre Sailer (CERN), Benedikt Hegner (CERN), Juan Miguel Carceller (CERN), Leonhard Reichenbach (University of Bonn (DE)), Swathi Sasikumar (CERN)