{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:COMTRJBI7RTEX72ZE6J64CCEOM","short_pith_number":"pith:COMTRJBI","schema_version":"1.0","canonical_sha256":"139938a428fc664bff592793ee084473203b4a24081b5b46e15c463ad66cfed7","source":{"kind":"arxiv","id":"2606.12753","version":1},"attestation_state":"computed","paper":{"title":"On the Limits of Performance Portability in Directive-Based GPU Programming","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.DC","authors_text":"Alessandro Romeo, Alessio Suriano, Andrea Mignone, Nitin Shukla, Stefano Truzzi","submitted_at":"2026-06-10T23:40:19Z","abstract_excerpt":"The transition of scientific applications to GPU-accelerated exascale systems is constrained by trade-offs between performance, portability, and productivity. This work evaluates the performance portability of directive-based GPU programming by porting gPLUTO, a production-grade magnetohydrodynamics code for astrophysical simulations, from OpenACC to OpenMP, and analyzing its performance on NVIDIA A100 (Leonardo Booster) and AMD MI250X (LUMI-G) devices. On NVIDIA platforms, OpenACC and OpenMP achieve comparable performance due to a shared compiler backend, providing a consistent baseline for a"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2606.12753","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.DC","submitted_at":"2026-06-10T23:40:19Z","cross_cats_sorted":[],"title_canon_sha256":"2632d618be9b6c7f080be2ebaa700dda82fbca5ce569a97c412b4864c5a23d9a","abstract_canon_sha256":"4126ad901d65b3fc720a6dacce6cd1a7007e7858a7e7ab6e1a1558a543003c46"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-12T01:08:49.333177Z","signature_b64":"rT/a/9NwwJvR2NcCC6S6rCw+HOjEgnT6+jnbUaxrkJKQm81uMs04o6tSzSZUqvrdOyB0Z117rkWNJngvmqNQDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"139938a428fc664bff592793ee084473203b4a24081b5b46e15c463ad66cfed7","last_reissued_at":"2026-06-12T01:08:49.332426Z","signature_status":"signed_v1","first_computed_at":"2026-06-12T01:08:49.332426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the Limits of Performance Portability in Directive-Based GPU Programming","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.DC","authors_text":"Alessandro Romeo, Alessio Suriano, Andrea Mignone, Nitin Shukla, Stefano Truzzi","submitted_at":"2026-06-10T23:40:19Z","abstract_excerpt":"The transition of scientific applications to GPU-accelerated exascale systems is constrained by trade-offs between performance, portability, and productivity. This work evaluates the performance portability of directive-based GPU programming by porting gPLUTO, a production-grade magnetohydrodynamics code for astrophysical simulations, from OpenACC to OpenMP, and analyzing its performance on NVIDIA A100 (Leonardo Booster) and AMD MI250X (LUMI-G) devices. On NVIDIA platforms, OpenACC and OpenMP achieve comparable performance due to a shared compiler backend, providing a consistent baseline for a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.12753","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.12753/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2606.12753","created_at":"2026-06-12T01:08:49.332556+00:00"},{"alias_kind":"arxiv_version","alias_value":"2606.12753v1","created_at":"2026-06-12T01:08:49.332556+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.12753","created_at":"2026-06-12T01:08:49.332556+00:00"},{"alias_kind":"pith_short_12","alias_value":"COMTRJBI7RTE","created_at":"2026-06-12T01:08:49.332556+00:00"},{"alias_kind":"pith_short_16","alias_value":"COMTRJBI7RTEX72Z","created_at":"2026-06-12T01:08:49.332556+00:00"},{"alias_kind":"pith_short_8","alias_value":"COMTRJBI","created_at":"2026-06-12T01:08:49.332556+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/COMTRJBI7RTEX72ZE6J64CCEOM","json":"https://pith.science/pith/COMTRJBI7RTEX72ZE6J64CCEOM.json","graph_json":"https://pith.science/api/pith-number/COMTRJBI7RTEX72ZE6J64CCEOM/graph.json","events_json":"https://pith.science/api/pith-number/COMTRJBI7RTEX72ZE6J64CCEOM/events.json","paper":"https://pith.science/paper/COMTRJBI"},"agent_actions":{"view_html":"https://pith.science/pith/COMTRJBI7RTEX72ZE6J64CCEOM","download_json":"https://pith.science/pith/COMTRJBI7RTEX72ZE6J64CCEOM.json","view_paper":"https://pith.science/paper/COMTRJBI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2606.12753&json=true","fetch_graph":"https://pith.science/api/pith-number/COMTRJBI7RTEX72ZE6J64CCEOM/graph.json","fetch_events":"https://pith.science/api/pith-number/COMTRJBI7RTEX72ZE6J64CCEOM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/COMTRJBI7RTEX72ZE6J64CCEOM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/COMTRJBI7RTEX72ZE6J64CCEOM/action/storage_attestation","attest_author":"https://pith.science/pith/COMTRJBI7RTEX72ZE6J64CCEOM/action/author_attestation","sign_citation":"https://pith.science/pith/COMTRJBI7RTEX72ZE6J64CCEOM/action/citation_signature","submit_replication":"https://pith.science/pith/COMTRJBI7RTEX72ZE6J64CCEOM/action/replication_record"}},"created_at":"2026-06-12T01:08:49.332556+00:00","updated_at":"2026-06-12T01:08:49.332556+00:00"}