{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:P7SLECKWDX5OMQMCTDSBV4H3YR","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":"5716821cd64323e32115c9474eb41f46709e63e3e6ce1a8401e8087a57ebf325","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2026-08-12T06:04:30Z","title_canon_sha256":"37e829ee24901caf9417d6c3e3222788b6a6b8a676e2adfa3056e56b54b2c449"},"schema_version":"1.0","source":{"id":"2608.11693","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.11693","created_at":"2026-08-13T01:27:51Z"},{"alias_kind":"arxiv_version","alias_value":"2608.11693v1","created_at":"2026-08-13T01:27:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.11693","created_at":"2026-08-13T01:27:51Z"},{"alias_kind":"pith_short_12","alias_value":"P7SLECKWDX5O","created_at":"2026-08-13T01:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"P7SLECKWDX5OMQMC","created_at":"2026-08-13T01:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"P7SLECKW","created_at":"2026-08-13T01:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:8d256cb4209eff813512aacaa95ab8999988bd17efd3b7fd047ef478c7090a17","target":"graph","created_at":"2026-08-13T01:27:51Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2608.11693/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"NVIDIA's published specifications give the Blackwell Ultra GPU (B300) a dense-compute ratio of roughly 30:1 between FP8 and INT8 tensor-core throughput; its predecessors, H200 and B200, both provide 1:1. We audit what this deprioritization means in practice by tracing INT8 W8A8 support through four layers of the stack: the published specifications, the PTX ISA, NVIDIA's CUTLASS kernel library, and the two major open-source LLM serving engines (vLLM and SGLang). We find a consistent, layered withdrawal: (i) the PTX ISA never exposes the fifth-generation tensor-core integer path (tcgen05.mma wit","authors_text":"Teng-Ruei Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2026-08-12T06:04:30Z","title":"Spec Sheets Are Not Kernels: An ISA- and Source-Level Audit of INT8 Availability on NVIDIA Blackwell Ultra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.11693","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":"sha256:94aad1e8236883de7e3fa589da24e165a9196959d1a354607074ae54ecfe4ffb","target":"record","created_at":"2026-08-13T01:27:51Z","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":"5716821cd64323e32115c9474eb41f46709e63e3e6ce1a8401e8087a57ebf325","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2026-08-12T06:04:30Z","title_canon_sha256":"37e829ee24901caf9417d6c3e3222788b6a6b8a676e2adfa3056e56b54b2c449"},"schema_version":"1.0","source":{"id":"2608.11693","kind":"arxiv","version":1}},"canonical_sha256":"7fe4b209561dfae6418298e41af0fbc44583236c4b2514e9959d8dc31e9a9f36","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7fe4b209561dfae6418298e41af0fbc44583236c4b2514e9959d8dc31e9a9f36","first_computed_at":"2026-08-13T01:27:51.251031Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-13T01:27:51.251031Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AXa7E3HYwcqJok0nwVS4uQ7REjUtGs8DtAwH6ONRykqtCe27Tejf2T2/TokaOBprp4k44pfQUmxMkLlbnnWUDg==","signature_status":"signed_v1","signed_at":"2026-08-13T01:27:51.253392Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.11693","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:94aad1e8236883de7e3fa589da24e165a9196959d1a354607074ae54ecfe4ffb","sha256:8d256cb4209eff813512aacaa95ab8999988bd17efd3b7fd047ef478c7090a17"],"state_sha256":"a2478d196500207393784bb85d2b4a0abf54ecc18aeecabb8dcbde6e7506b3dd"}