{ "access": { "embargo": { "active": false, "reason": null }, "files": "public", "record": "public", "status": "open" }, "created": "2025-12-02T13:17:51.461539+00:00", "custom_fields": { "cern:administrative_unit": "CMG", "cern:departments": [ { "id": "EP", "title": { "en": "EP" } } ], "cern:experiments": [ { "id": "CMS", "title": { "en": "CMS" } } ], "meeting:meeting": { "dates": "18/11/2025", "place": "Valencia", "title": "ROOT Users Workshop 2025" } }, "deletion_status": { "is_deleted": false, "status": "P" }, "file_key": "files/ncx4g-e0047__MarkusHolzerCMSSWSoA.pdf", "files": { "count": 1, "enabled": true, "entries": { "MarkusHolzerCMSSWSoA.pdf": { "access": { "hidden": false }, "checksum": "md5:d0ba92b5141c51d1b99e64efb32f36e4", "ext": "pdf", "id": "38037b19-cc8a-41ed-bd04-c407b574c4e9", "key": "MarkusHolzerCMSSWSoA.pdf", "metadata": {}, "mimetype": "application/pdf", "size": 1420135 } }, "order": [], "total_bytes": 1420135 }, "id": "ncx4g-e0047", "is_draft": false, "is_published": true, "links": { "access": "https://repository.cern/api/records/ncx4g-e0047/access", "access_grants": "https://repository.cern/api/records/ncx4g-e0047/access/grants", "access_groups": "https://repository.cern/api/records/ncx4g-e0047/access/groups", "access_links": "https://repository.cern/api/records/ncx4g-e0047/access/links", "access_request": "https://repository.cern/api/records/ncx4g-e0047/access/request", "access_users": "https://repository.cern/api/records/ncx4g-e0047/access/users", "archive": "https://repository.cern/api/records/ncx4g-e0047/files-archive", "archive_media": "https://repository.cern/api/records/ncx4g-e0047/media-files-archive", "communities": "https://repository.cern/api/records/ncx4g-e0047/communities", "communities-suggestions": "https://repository.cern/api/records/ncx4g-e0047/communities-suggestions", "draft": "https://repository.cern/api/records/ncx4g-e0047/draft", "file_modification": "https://repository.cern/api/records/ncx4g-e0047/file-modification", "files": "https://repository.cern/api/records/ncx4g-e0047/files", "latest": "https://repository.cern/api/records/ncx4g-e0047/versions/latest", "latest_html": "https://repository.cern/records/ncx4g-e0047/latest", "media_files": "https://repository.cern/api/records/ncx4g-e0047/media-files", "parent": "https://repository.cern/api/records/hj96y-7nv25", "parent_html": "https://repository.cern/records/hj96y-7nv25", "preview_html": "https://repository.cern/records/ncx4g-e0047?preview=1", "quota_increase": "https://repository.cern/api/records/ncx4g-e0047/quota-increase", "request_deletion": "https://repository.cern/api/records/ncx4g-e0047/request-deletion", "requests": "https://repository.cern/api/records/ncx4g-e0047/requests", "reserve_doi": "https://repository.cern/api/records/ncx4g-e0047/draft/pids/doi", "self": "https://repository.cern/api/records/ncx4g-e0047", "self_html": "https://repository.cern/records/ncx4g-e0047", "self_iiif_manifest": "https://repository.cern/api/iiif/record:ncx4g-e0047/manifest", "self_iiif_sequence": "https://repository.cern/api/iiif/record:ncx4g-e0047/sequence/default", "thumbnails": { "10": "https://repository.cern/api/iiif/record:ncx4g-e0047:MarkusHolzerCMSSWSoA.pdf/full/%5E10,/0/default.jpg", "100": "https://repository.cern/api/iiif/record:ncx4g-e0047:MarkusHolzerCMSSWSoA.pdf/full/%5E100,/0/default.jpg", "1200": "https://repository.cern/api/iiif/record:ncx4g-e0047:MarkusHolzerCMSSWSoA.pdf/full/%5E1200,/0/default.jpg", "250": "https://repository.cern/api/iiif/record:ncx4g-e0047:MarkusHolzerCMSSWSoA.pdf/full/%5E250,/0/default.jpg", "50": "https://repository.cern/api/iiif/record:ncx4g-e0047:MarkusHolzerCMSSWSoA.pdf/full/%5E50,/0/default.jpg", "750": "https://repository.cern/api/iiif/record:ncx4g-e0047:MarkusHolzerCMSSWSoA.pdf/full/%5E750,/0/default.jpg" }, "versions": "https://repository.cern/api/records/ncx4g-e0047/versions" }, "media_files": { "count": 0, "enabled": false, "entries": {}, "order": [], "total_bytes": 0 }, "metadata": { "creators": [ { "affiliations": [ { "name": "CERN" } ], "person_or_org": { "family_name": "Holzer", "given_name": "Markus", "identifiers": [ { "identifier": "0000-0001-5499-5857", "scheme": "orcid" } ], "name": "Holzer, Markus", "type": "personal" } }, { "affiliations": [ { "name": "CERN" }, { "id": "01nffqt88", "identifiers": [ { "identifier": "01nffqt88", "scheme": "ror" } ], "name": "Politecnico di Milano" } ], "person_or_org": { "family_name": "Beltrame", "given_name": "Leonardo", "name": "Beltrame, Leonardo", "type": "personal" } }, { "affiliations": [ { "name": "CERN" } ], "person_or_org": { "family_name": "Bocci", "given_name": "Andrea", "name": "Bocci, Andrea", "type": "personal" } }, { "affiliations": [ { "id": "01ggx4157", "identifiers": [ { "identifier": "01ggx4157", "scheme": "ror" } ], "name": "European Organization for Nuclear Research" } ], "person_or_org": { "family_name": "Pantaleo", "given_name": "Felice", "identifiers": [ { "identifier": "0000-0003-3266-4357", "scheme": "orcid" } ], "name": "Pantaleo, Felice", "type": "personal" }, "role": { "id": "workpackageleader", "title": { "de": "ArbeitspaketleiterIn", "en": "Work package leader" } } }, { "affiliations": [ { "name": "CERN" }, { "name": "Universita di Bologna" }, { "name": "INFN-CNAF Bologna" } ], "person_or_org": { "family_name": "Balducci", "given_name": "Simone", "name": "Balducci, Simone", "type": "personal" } } ], "dates": [ { "date": "2025-11-18", "type": { "id": "submitted", "title": { "de": "Eingereicht", "en": "Submitted" } } } ], "description": "

The Struct of Arrays (SoA) layout separates structure fields into individual arrays, each holding a single attribute across all elements. Compared to the traditional Array of Structures (AoS), SoA improves data locality, vectorisation, cache usage, and memory bandwidth—critical for heterogeneous computing. In CMSSW, SoA is implemented using the Boost::PP library to provide a clean, user-friendly interface. This work outlines CMSSW’s SoA features, their integration with ROOT RNTuple, and highlights recent developments and planned extensions. We also present CMSSW’s requirements for the RNTuple format moving forward.

", "funding": [ { "funder": { "id": "014bj2y47", "name": "Schmidt Family Foundation" } } ], "publication_date": "2025-11-18", "publisher": "CERN", "resource_type": { "id": "presentation", "title": { "cs": "Prezentace", "de": "Präsentation", "en": "Presentation", "sv": "Presentation" } }, "rights": [ { "description": { "en": "The Creative Commons Attribution license allows re-distribution and re-use of a licensed work on the condition that the creator is appropriately credited." }, "icon": "cc-by-icon", "id": "cc-by-4.0", "props": { "scheme": "spdx", "url": "https://creativecommons.org/licenses/by/4.0/legalcode" }, "title": { "en": "Creative Commons Attribution 4.0 International" } } ], "title": "User Story: Integration of ROOT RNTuple to CMSSW's SoA data structures" }, "parent": { "access": { "owned_by": { "user": "53856" }, "settings": { "accept_conditions_text": null, "allow_guest_requests": false, "allow_user_requests": false, "secret_link_expiration": 0 } }, "communities": { "default": "da007c73-b7a0-4672-8f99-11faf13bab28", "entries": [ { "access": { "member_policy": "closed", "members_visibility": "public", "record_submission_policy": "open", "review_policy": "closed", "visibility": "public" }, "children": { "allow": false }, "created": "2025-06-18T07:31:01.048123+00:00", "deletion_status": { "is_deleted": false, "status": "P" }, "id": "da007c73-b7a0-4672-8f99-11faf13bab28", "links": {}, "metadata": { "funding": [ { "funder": { "id": "014bj2y47", "name": "Schmidt Family Foundation" } } ], "title": "Next Generation Triggers", "website": "https://nextgentriggers.web.cern.ch/" }, "revision_id": 12, "slug": "nextgentriggers", "updated": "2025-09-29T09:50:50.476550+00:00" } ], "ids": [ "da007c73-b7a0-4672-8f99-11faf13bab28" ] }, "id": "hj96y-7nv25", "pids": {} }, "pids": { "oai": { "identifier": "oai:oai:repository.cern::ncx4g-e0047", "provider": "oai" } }, "revision_id": 6, "source_file_key": "MarkusHolzerCMSSWSoA.pdf", "source_file_url": "https://repository.cern/api/records/ncx4g-e0047/files/MarkusHolzerCMSSWSoA.pdf/content", "stats": { "all_versions": { "data_volume": 96569180.0, "downloads": 68, "unique_downloads": 60, "unique_views": 64, "views": 154 }, "this_version": { "data_volume": 96569180.0, "downloads": 68, "unique_downloads": 60, "unique_views": 64, "views": 154 } }, "status": "published", "updated": "2025-12-04T09:10:44.974964+00:00", "versions": { "index": 1, "is_latest": true } }