{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:7BXGI7V3HO6OCGB6ZSFE5T6P3C","short_pith_number":"pith:7BXGI7V3","canonical_record":{"source":{"id":"1303.4538","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PF","submitted_at":"2013-03-19T10:18:40Z","cross_cats_sorted":["cs.DC"],"title_canon_sha256":"a3f011fb3a68a06599fa13f67bcfcb185f528e4cc26be386413655afaad23ecd","abstract_canon_sha256":"c8bb6296b91c7cb890d1159c971c154167018647775954136b2334f500d32fcb"},"schema_version":"1.0"},"canonical_sha256":"f86e647ebb3bbce1183ecc8a4ecfcfd89e34deb248a1cfeec554179830c699ee","source":{"kind":"arxiv","id":"1303.4538","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.4538","created_at":"2026-05-18T03:30:26Z"},{"alias_kind":"arxiv_version","alias_value":"1303.4538v1","created_at":"2026-05-18T03:30:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.4538","created_at":"2026-05-18T03:30:26Z"},{"alias_kind":"pith_short_12","alias_value":"7BXGI7V3HO6O","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7BXGI7V3HO6OCGB6","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7BXGI7V3","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:7BXGI7V3HO6OCGB6ZSFE5T6P3C","target":"record","payload":{"canonical_record":{"source":{"id":"1303.4538","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PF","submitted_at":"2013-03-19T10:18:40Z","cross_cats_sorted":["cs.DC"],"title_canon_sha256":"a3f011fb3a68a06599fa13f67bcfcb185f528e4cc26be386413655afaad23ecd","abstract_canon_sha256":"c8bb6296b91c7cb890d1159c971c154167018647775954136b2334f500d32fcb"},"schema_version":"1.0"},"canonical_sha256":"f86e647ebb3bbce1183ecc8a4ecfcfd89e34deb248a1cfeec554179830c699ee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:30:26.871217Z","signature_b64":"cGOFayqsIn5x//PZSvljAzyKTmvusqjXBCfqBE7ytr4UxKXTDHOmegO9SlbfuGv5Oj/KjPmEbPhT1GdBCDB0AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f86e647ebb3bbce1183ecc8a4ecfcfd89e34deb248a1cfeec554179830c699ee","last_reissued_at":"2026-05-18T03:30:26.870560Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:30:26.870560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.4538","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:30:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"72ucFqcpl0U/qNoptcXRyuqBDZ6cqIhFlJfaHdSxOhJ6T3W3s3wGXrD7J9PB5NlfWKGst6G75CJe0q56NqPGAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T17:08:25.014766Z"},"content_sha256":"06160747c53b1dcf551616cbd46538d6d4182f220b67883c1d82d5fca819f6e2","schema_version":"1.0","event_id":"sha256:06160747c53b1dcf551616cbd46538d6d4182f220b67883c1d82d5fca819f6e2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:7BXGI7V3HO6OCGB6ZSFE5T6P3C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimization of FASTEST-3D for Modern Multicore Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.DC"],"primary_cat":"cs.PF","authors_text":"Christoph Scheit, Georg Hager, Gerhard Wellein, Jan Treibig, Stefan Becker","submitted_at":"2013-03-19T10:18:40Z","abstract_excerpt":"FASTEST-3D is an MPI-parallel finite-volume flow solver based on block-structured meshes that has been developed at the University of Erlangen-Nuremberg since the early 1990s. It can be used to solve the laminar or turbulent incompressible Navier-Stokes equations. Up to now its scalability was strongly limited by a rather rigid communication infrastructure, which led to a dominance of MPI time already at small process counts.\n  This paper describes several optimizations to increase the performance, scalability, and flexibility of FASTEST-3D. First, a node-level performance analysis is carried "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.4538","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:30:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h8sAVEaYIOtmt/zQL/xbVHZBfU/u0KqpSPblYdSFMk0lrSabfHqiL6lugXzKqZG5kp1nvQxYJlTvLmxBs9KOBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T17:08:25.015630Z"},"content_sha256":"1fb7fc411def52ab9b191d0b283a42630a30042d11a7c320b3228e6c79f2ec4f","schema_version":"1.0","event_id":"sha256:1fb7fc411def52ab9b191d0b283a42630a30042d11a7c320b3228e6c79f2ec4f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7BXGI7V3HO6OCGB6ZSFE5T6P3C/bundle.json","state_url":"https://pith.science/pith/7BXGI7V3HO6OCGB6ZSFE5T6P3C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7BXGI7V3HO6OCGB6ZSFE5T6P3C/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-08T17:08:25Z","links":{"resolver":"https://pith.science/pith/7BXGI7V3HO6OCGB6ZSFE5T6P3C","bundle":"https://pith.science/pith/7BXGI7V3HO6OCGB6ZSFE5T6P3C/bundle.json","state":"https://pith.science/pith/7BXGI7V3HO6OCGB6ZSFE5T6P3C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7BXGI7V3HO6OCGB6ZSFE5T6P3C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:7BXGI7V3HO6OCGB6ZSFE5T6P3C","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"c8bb6296b91c7cb890d1159c971c154167018647775954136b2334f500d32fcb","cross_cats_sorted":["cs.DC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PF","submitted_at":"2013-03-19T10:18:40Z","title_canon_sha256":"a3f011fb3a68a06599fa13f67bcfcb185f528e4cc26be386413655afaad23ecd"},"schema_version":"1.0","source":{"id":"1303.4538","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.4538","created_at":"2026-05-18T03:30:26Z"},{"alias_kind":"arxiv_version","alias_value":"1303.4538v1","created_at":"2026-05-18T03:30:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.4538","created_at":"2026-05-18T03:30:26Z"},{"alias_kind":"pith_short_12","alias_value":"7BXGI7V3HO6O","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7BXGI7V3HO6OCGB6","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7BXGI7V3","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:1fb7fc411def52ab9b191d0b283a42630a30042d11a7c320b3228e6c79f2ec4f","target":"graph","created_at":"2026-05-18T03:30:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"FASTEST-3D is an MPI-parallel finite-volume flow solver based on block-structured meshes that has been developed at the University of Erlangen-Nuremberg since the early 1990s. It can be used to solve the laminar or turbulent incompressible Navier-Stokes equations. Up to now its scalability was strongly limited by a rather rigid communication infrastructure, which led to a dominance of MPI time already at small process counts.\n  This paper describes several optimizations to increase the performance, scalability, and flexibility of FASTEST-3D. First, a node-level performance analysis is carried ","authors_text":"Christoph Scheit, Georg Hager, Gerhard Wellein, Jan Treibig, Stefan Becker","cross_cats":["cs.DC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PF","submitted_at":"2013-03-19T10:18:40Z","title":"Optimization of FASTEST-3D for Modern Multicore Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.4538","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:06160747c53b1dcf551616cbd46538d6d4182f220b67883c1d82d5fca819f6e2","target":"record","created_at":"2026-05-18T03:30:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"c8bb6296b91c7cb890d1159c971c154167018647775954136b2334f500d32fcb","cross_cats_sorted":["cs.DC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PF","submitted_at":"2013-03-19T10:18:40Z","title_canon_sha256":"a3f011fb3a68a06599fa13f67bcfcb185f528e4cc26be386413655afaad23ecd"},"schema_version":"1.0","source":{"id":"1303.4538","kind":"arxiv","version":1}},"canonical_sha256":"f86e647ebb3bbce1183ecc8a4ecfcfd89e34deb248a1cfeec554179830c699ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f86e647ebb3bbce1183ecc8a4ecfcfd89e34deb248a1cfeec554179830c699ee","first_computed_at":"2026-05-18T03:30:26.870560Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:30:26.870560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cGOFayqsIn5x//PZSvljAzyKTmvusqjXBCfqBE7ytr4UxKXTDHOmegO9SlbfuGv5Oj/KjPmEbPhT1GdBCDB0AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:30:26.871217Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.4538","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:06160747c53b1dcf551616cbd46538d6d4182f220b67883c1d82d5fca819f6e2","sha256:1fb7fc411def52ab9b191d0b283a42630a30042d11a7c320b3228e6c79f2ec4f"],"state_sha256":"5a7679bd9e784c213e8933c40b8a04c7eb5ea8902ad33f1e15ba148a24918c97"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T+eG5ooDQ6Oin7ESW62jGs8tGOUlNDeI7sphGUCaEZd+HTzPeszaQdpTGG71tT8wb0x3Efzpchgskmuh2AprDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T17:08:25.019621Z","bundle_sha256":"321bf3058be0019409f270d97cd52248f879774eac369a71f629a17697fb6e93"}}