{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IVP7YNGM7Z54OJD5NS4RSIVFAM","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":"a99cf973dd9f138f34087862735f3f1e18de75d4f370e1247b4a50455d72e275","cross_cats_sorted":["hep-lat"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2015-12-14T20:27:07Z","title_canon_sha256":"1f3fdf5cba8ad11d4afe547f52fdaa04b14f10b445fe4f25f30d9741872c2c81"},"schema_version":"1.0","source":{"id":"1512.04506","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.04506","created_at":"2026-05-18T01:24:22Z"},{"alias_kind":"arxiv_version","alias_value":"1512.04506v1","created_at":"2026-05-18T01:24:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.04506","created_at":"2026-05-18T01:24:22Z"},{"alias_kind":"pith_short_12","alias_value":"IVP7YNGM7Z54","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IVP7YNGM7Z54OJD5","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IVP7YNGM","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:73d00f79899438307841c5b1bd0298589b7426f26abc2102df5acbd4dff06da8","target":"graph","created_at":"2026-05-18T01:24:22Z","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":"We present details of our implementation of the Wuppertal adaptive algebraic multigrid code DD-$\\alpha$AMG on SIMD architectures, with particular emphasis on the Intel Xeon Phi processor (KNC) used in QPACE 2. As a smoother, the algorithm uses a domain-decomposition-based solver code previously developed for the KNC in Regensburg. We optimized the remaining parts of the multigrid code and conclude that it is a very good target for SIMD architectures. Some of the remaining bottlenecks can be eliminated by vectorizing over multiple test vectors in the setup, which is discussed in the contributio","authors_text":"Matthias Rottmann, Peter Georg, Simon Heybrock, Tilo Wettig","cross_cats":["hep-lat"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2015-12-14T20:27:07Z","title":"Adaptive algebraic multigrid on SIMD architectures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.04506","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":"sha256:57d34932019cce753784da46ec9a3aa419f15f5c1368656046321b04c35c8e7b","target":"record","created_at":"2026-05-18T01:24:22Z","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":"a99cf973dd9f138f34087862735f3f1e18de75d4f370e1247b4a50455d72e275","cross_cats_sorted":["hep-lat"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2015-12-14T20:27:07Z","title_canon_sha256":"1f3fdf5cba8ad11d4afe547f52fdaa04b14f10b445fe4f25f30d9741872c2c81"},"schema_version":"1.0","source":{"id":"1512.04506","kind":"arxiv","version":1}},"canonical_sha256":"455ffc34ccfe7bc7247d6cb91922a50338c06a8f752eb6ecd68d09e643eb7e27","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"455ffc34ccfe7bc7247d6cb91922a50338c06a8f752eb6ecd68d09e643eb7e27","first_computed_at":"2026-05-18T01:24:22.122248Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:22.122248Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"STJb7jDZvVgom3TuR1WxlK7WJ37L+oCK4eIFwScdvyE6zrUEowGd1gld8gQRJQbjQBe0VPXN1neUKalfVht/BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:22.122872Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.04506","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:57d34932019cce753784da46ec9a3aa419f15f5c1368656046321b04c35c8e7b","sha256:73d00f79899438307841c5b1bd0298589b7426f26abc2102df5acbd4dff06da8"],"state_sha256":"1ed34353f4ae9cda624645f5dd11d5614cb1b589057bf5bb4bedcd263244d379"}