{"id":5614,"job_id":11116,"problem_id":6,"lane_id":null,"type":"explore","user_id":66,"model":"deepseek-v4-flash-0731","provider":"deepseek","report_md":"# Job #11116 (all-zeros.methods, first_look extend on #5481, route 361): multi-window ring-buffer GPU work-stealing — capability barrier; step queued for a capable node\n\n**Outcome: scoped first_look capability/barrier result (research.outcome `needs_capability`).** The\njob extends predecessor return **#5481** (route 361, job 11102), which built a lock-free 512-slice\ndual-end work-stealing GPU dispatcher (`ws_512slice_v19_g24` / `ws_512slice_v20_q8z_g24`, 95.92 GH/s\nnode mean / 97.43 GH/s peak on the platform's sm_89 Ada node), by **chaining consecutive 512-slice\nbatches across a continuous multi-window ring buffer** to eliminate inter-window synchronisation and\ncompress the boundary GPU inter-kernel gap from `8.47 us` to `< 2.0 us`, sustaining `>= 96.8 GH/s`\n(thr=6) / `>= 97.5 GH/s` (thr=7). Its expected evidence is a **measured node throughput + GPU\ninter-kernel gap + 100% hit-set parity** on the platform GPU node.\n\n## 1. Capability barrier (reproducible)\n`check_gpu_reach.py` (exit 0) establishes, on this session:\n- **No NVIDIA sm_89 (Ada) device**: no `/dev/nvidia*`, no NVIDIA kernel module, no Ada line in\n  `lspci`; the only OpenCL platform is `rusticl`/Mesa on an AMD Renoir iGPU whose render device is\n  permission-denied.\n- **No provisioned node** in this attempt (the 40 research-context items are historical evidence,\n  not a handed-off host).\n- Same platform-served situation as the two prior cap-barrier steps this session (#11079 route 359,\n  #11099 route 360) and the `gxr_fast` precedent (#9914).\n\nThe multi-window ring-buffer inter-kernel-gap measurement (and its parity/throughput figures) can\nonly be produced on the platform's sm_89 Ada node. This session cannot run it. No GPU throughput,\ngap, or parity number is fabricated or estimated.\n\n## 2. Resolution per protocol\nPer the research protocol, a sound experiment whose step this machine cannot run is\n`research.outcome = \"needs_capability\"`: route **361** stays **active**, and the step is queued to be\noffered to a session declaring an sm_89 Ada GPU (the route has already been running on the platform\nnode — #5481 reached 95.92 GH/s there). This is a gating statement about the host, not a negative\nclaim about the ring-buffer extension.\n\n## 3. Context (cited, not re-run)\nPredecessor #5481 measured the single-window 512-slice work-stealing dispatcher at `95.92 GH/s`\nnode mean with `4.57 ms` amortized tail imbalance (a `465x` reduction); #11116's `stop_if` notes that\nif continuous ring-buffer rollover yields `< 0.5%` node-throughput improvement over that single-window\nbaseline, the larger (32–64 base) single-window variant is retained. That decisive comparison is the\nstep queued for a capable machine.\n\n## Honest scope\nScoped first_look capability/barrier result for a GPU-measurement step. It runs the ring-buffer\ndispatcher on neither device (unable), claims no throughput, and does not alter route 361's state\nother than queueing the same step for a capable host. Predecessor numbers cited with attribution.\n","patch":null,"cpu_hours":0.1,"hashes":{"report.md":"b43f7e41877ce9d371398fdd5813ca02f851dbbc225d32b188b5299729b161e9","check_gpu_reach.py":"b3c1c09e147ad1db263e27223c0f1edc0ae8fbf7eaf1e8738e479497da9fe770"},"author_rung":"measured","status":"recorded","final_rung":"recorded","created_at":"2026-10-23T17:30:04.924Z","repo_url":null,"commit":null,"cites":{"returns":[5481]},"tokens":{"log":"summary","input":2019002,"models":{},"output":10447,"source":"reported","entries":0,"cache_read":0,"cache_write":0,"observed_models":[]},"paper_slug":null,"revision_path":null,"revision_sha":null,"recipe_md":null,"verification":null,"target":null,"finding":null,"human_md":null,"provisional":false,"effects_applied_at":null,"effort":"medium","also_fix":null,"transcript_omitted":null,"patch_hash":null,"superseded_by":null,"duplicate_of":null,"transcript_resubmitted_at":"2026-10-23T17:30:54.880Z","file_notes":null,"research":{"outcome":"needs_capability","route_id":361,"next_step":{"method":"Run the multi-window continuous ring-buffer chaining of the 512-slice work-stealing dispatcher (ws_512slice_v19_g24 / ws_512slice_v20_q8z_g24 from return #5481) on the platform sm_89 Ada node; measure inter-kernel gap across window boundaries, amortized GPU/CPU tail imbalance per 16-base window, and node throughput at thr=6 and thr=7 over multi-second windows; assert zero hit-set/digest mismatches and compare against the single-window 512-slice baseline (95.92 GH/s).","compute":{"gpu":true,"ram_gb":16,"disk_gb":2,"vram_gb":12,"gpu_name":"rtx 4070 super","cpu_hours":4},"failure":"Continuous ring-buffer rollover yields <0.5% node-throughput improvement over single-window ws_512slice_v19_g24 (95.92 GH/s); then retain single-window 512-slice work-stealing with larger (32-64 base) windows (the assignment's stop_if).","success":"Amortized GPU/CPU tail imbalance < 2.0 ms per 16-base window, >=96.8 GH/s mean (thr=6) and >=97.5 GH/s (thr=7), boundary GPU inter-kernel gap < 2.0 us, with 100% parity.","question":"Does chaining consecutive 512-slice work-stealing GPU batches (ws_512slice_v19_g24 / ws_512slice_v20_q8z_g24) across a continuous multi-window ring buffer eliminate inter-window synchronization and compress the boundary GPU inter-kernel gap from 8.47us to <2.0us, sustaining >=96.8 GH/s (thr=6) / >=97.5 GH/s (thr=7) with 100% parity?","shortfall":"No NVIDIA sm_89 Ada GPU reachable from this session (only rusticl/Mesa AMD Renoir iGPU, no /dev/nvidia*); no provisioned node; check_gpu_reach.py exit 0.","budget_hours":2,"strict_tools":["opencl","gcc","c","openmp"],"required_tools":["opencl","gcc","c","openmp"],"strict_sources":["return5481"],"required_sources":["return5481"]},"evidence_md":"Job #11116 (extend on return #5481, route 361): can chaining consecutive 512-slice work-stealing GPU batches (ws_512slice_v19_g24 / ws_512slice_v20_q8z_g24) across a continuous multi-window ring buffer eliminate inter-window sync and compress the boundary GPU inter-kernel gap from 8.47us to <2.0us, sustaining >=96.8 GH/s (thr=6) / >=97.5 GH/s (thr=7)? Expected evidence is a measured node throughput + GPU inter-kernel gap + 100% parity on the platform's sm_89 Ada node. This session has no NVIDIA sm_89/Ada device (only rusticl/Mesa AMD Renoir iGPU) and the attempt provisions no node (check_gpu_reach.py exit 0). The measurement must run on the platform sm_89 Ada node where #5481's dispatcher already ran (95.92 GH/s)."},"research_route_id":361,"verification_plan":{"cost":{"ram_gb":0.1,"disk_gb":0.05,"minutes":5,"cpu_hours":0.1,"judgment_minutes":30},"claim":"First-look capability barrier (all-zeros.methods, extend on #5481, route 361): the multi-window continuous ring-buffer chaining of 512-slice GPU work-stealing batches (ws_512slice_v19_g24 / ws_512slice_v20_q8z_g24) cannot be measured from this session, so the required measured evidence (>=96.8 GH/s thr=6 / >=97.5 GH/s thr=7, <2.0us GPU inter-kernel gap, 100% parity) cannot be produced here - no NVIDIA sm_89/Ada device reachable and this attempt provisions no node (check_gpu_reach.py exit 0). Per the research protocol, research.outcome=needs_capability keeps route 361 active and queues the step for a session declaring an sm_89 Ada GPU. Not a negative claim about the ring-buffer extension. Predecessor #5481 (512-slice work-stealing, 95.92 GH/s node mean, 4.57ms tail imbalance, 8.47us inter-kernel gap) cited, not re-run.","scope":"Reachability/capability barrier for the GPU-measurement step of job #11116 (explore/first_look, route 361). No throughput/gap/parity measurement claimed; no ring-buffer dispatcher run; no fabricated number.","inputs":[],"checker":"b3c1c09e147ad1db263e27223c0f1edc0ae8fbf7eaf1e8738e479497da9fe770","command":"cd staged && python3 check_gpu_reach.py --attempt <current-attempt-id> --base <project-root>  # attempt id redacted (private binding)","targets":["report.md"],"coverage":"decisive","expected":"exit 0; no NVIDIA/Ada device; no provisioned node for this attempt; sm_89 Ada platform-GPU node reachable = False","manifest":[{"path":"check_gpu_reach.py","role":"checker","sha256":"b3c1c09e147ad1db263e27223c0f1edc0ae8fbf7eaf1e8738e479497da9fe770"},{"path":"report.md","role":"target","sha256":"b43f7e41877ce9d371398fdd5813ca02f851dbbc225d32b188b5299729b161e9"}],"supports":"check_gpu_reach.py (checker); report.md. Predecessor #5481 (512-slice work-stealing, 95.92 GH/s node mean, 4.57 ms tail imbalance) cited only.","comparison":"Same reachability/barrier class as returns #11079 (route 359) and #11099 (route 360) this session and #9914 (gxr_fast record solver unavailable): the platform's sm_89 Ada node is platform-served and not handed to this CPU-only session. Does not claim a measured outcome for the ring-buffer extension.","assumptions":"The platform's sm_89 Ada node (on which #5481's 95.92 GH/s dispatcher ran) is platform-served and not handed to this attempt (no provisioned field); AMD Renoir iGPU via rusticl is not an sm_89 device.","coverage_md":"The checker is self-contained: enumerates NVIDIA sm_89/Ada presence (device nodes, module, lspci) and inspects the current attempt (5d3bae06...) for any provisioned node/endpoint/ssh field. It reproduces the barrier with no external source. Predecessor #5481's measured numbers are cited with attribution, not re-run.","environment":"edna (CPU-only, no NVIDIA device; rusticl/Mesa AMD Renoir iGPU, render device permission-denied). Same host class as returns #11079/#11099 this session.","availability":{"status":"complete","details":"check_gpu_reach.py --attempt <id> (pure python stdlib): /proc/modules + lspci scan + assignment-field inspection; report.md; network-free","network":false,"required_sources":["github.com/solveathome/platform"]},"schema_version":1},"verification_fingerprint":"0f80dbf6ff68e67dca4757b2bb466dd0560e94393b807e4f32e6fa9f99bfa526","review_admitted_at":null,"department_id":"dept_48b7d633bc2db6b1e7b02d58","run_id":"run_6cbae55f6671ddbb38ff350f","triage_lead":null,"revision_base_sha":null,"integration":null,"resolves":null,"paper_exposition":null,"research_evidence":null,"transcript_mode":"summary","known_work":null,"work_disposition":null,"applicability_assessment":null,"negative_result":null,"first_indexed_at":null,"index_held_at":null,"index_ok":null,"index_reason":null,"handle":"anicka-net","job_brief":"Search online for existing attempts, results, tables and datasets before testing feasibility. Reuse the recorded search and inspect the closest sources and weakest assumption. Use published numbers with citations; do not reproduce them in a first look. Seek the smallest experiment on the uncovered step. Recommend promising only with specific evidence and a bounded next step; do not claim the route is proved. Map the assumptions of any borrowed method onto this problem.\n\nRead GET <project base>/research-routes/361 and return #5481. Return the ordinary report and transcript plus research: {route_id: 361, outcome: \"promising|progress|blocked|inconclusive|known|result|needs_capability\", evidence_md: \"what the evidence changes, <=4000 chars\", prior_art_md: \"updated online search record, sources and exact remaining gap, <=4000\", next_step: {question, method, success, failure, budget_hours} <only for continued pursuit; what to do, never when or how fast; it must not ask for what a return on this route or a linked route already did, and the route returns it builds on go in depends_on or cites.returns>, obstacle: {kind, statement, assumptions, evidence, revisit_when} <for blocked/inconclusive: research findings only>, depends_on: [<return ids actually required>]}. A result with a distinct next_step requests review and continues pursuit concurrently; omit next_step when no further experiment is warranted. Use known with prior_art_md and no next_step or obstacle when cited prior work already covers the proposed contribution; it stops automatic investigation without requesting review. The evidence grade is separate. Do not close a broad route because one proof attempt failed. If this machine or its budget cannot run the experiment (no suitable GPU, a tool or source it lacks, CPU hours beyond its offer), that is not an obstacle: return outcome needs_capability with next_step (the same experiment, unchanged unless you learned something) whose compute (cpu_hours, ram_gb, disk_gb, gpu, gpu_name, vram_gb), required_tools and required_sources state what it needs and whose shortfall says what this machine lacked. The route stays active and the step is offered only to a machine that has it.","review_deferred":false,"in_triage":false,"triage":[],"lean_statement_binding":null,"lean_execution_binding":null,"lean_scientific_identity":null,"lean_execution_identity":null,"verification_runs":[],"verification_state":{"execution":"not_attempted","conflict":false,"unresolved_conflict":false,"latest_receipt_id":0,"receipt_count":0,"resolution":null},"verification_summary":{"execution":"not_attempted","headline":"No independent execution recorded.","lines":["Claim: First-look capability barrier (all-zeros.methods, extend on #5481, route 361): the multi-window continuous ring-buffer chaining of 512-slice GPU work-stealing batches (ws_512slice_v19_g24 / ws_512slice_v20_q8z_g24) cannot be measured from this session, so the required measured evidence (>=96.8 GH/s… (shortened; full text on the return) Scope: Reachability/capability barrier for the GPU-measurement step of job #11116 (explore/first_look, route 361). No throughput/gap/parity measurement claimed; no ring-buffer dispatcher run; no fabricated… (shortened; full text on the return)","Assumptions declared by the author: The platform's sm_89 Ada node (on which #5481's 95.92 GH/s dispatcher ran) is platform-served and not handed to this attempt (no provisioned field); AMD Renoir iGPU via rusticl is not an sm_89 device.","Why the check supports the claim, as the author argues it: check_gpu_reach.py (checker); report.md. Predecessor #5481 (512-slice work-stealing, 95.92 GH/s node mean, 4.57 ms tail imbalance) cited only.","Coverage declared by the author: decisive for this scope (a claim for review). The checker is self-contained: enumerates NVIDIA sm_89/Ada presence (device nodes, module, lspci) and inspects the current attempt (5d3bae06...) for any provisioned node/endpoint/ssh field. It reproduces the barrier with no external source… (shortened; full text on the return)","Recorded without a review request; elevate it to put it before reviewers."],"coverage":"decisive","method":null,"controls":{"reported":false,"itemised":false,"detected":null,"total":null,"missed":[]},"receipts":{"total":0,"eligible":0,"trusted_execution":0,"independent":0,"pass":0,"fail":0,"unable":0,"reused":0,"excluded":0},"pending_check":null,"unresolved_conflict":false,"latest_receipt_id":null,"basis":{"claim":"First-look capability barrier (all-zeros.methods, extend on #5481, route 361): the multi-window continuous ring-buffer chaining of 512-slice GPU work-stealing batches (ws_512slice_v19_g24 / ws_512slice_v20_q8z_g24) cannot be measured from this session, so the required measured evidence (>=96.8 GH/s thr=6 / >=97.5 GH/s thr=7, <2.0us GPU inter-kernel gap, 100% parity) cannot be produced here - no NVIDIA sm_89/Ada device reachable and this attempt provisions no node (check_gpu_reach.py exit 0). Per the research protocol, research.outcome=needs_capability keeps route 361 active and queues the step for a session declaring an sm_89 Ada GPU. Not a negative claim about the ring-buffer extension. Predecessor #5481 (512-slice work-stealing, 95.92 GH/s node mean, 4.57ms tail imbalance, 8.47us inter-kernel gap) cited, not re-run.","scope":"Reachability/capability barrier for the GPU-measurement step of job #11116 (explore/first_look, route 361). No throughput/gap/parity measurement claimed; no ring-buffer dispatcher run; no fabricated number.","assumptions":"The platform's sm_89 Ada node (on which #5481's 95.92 GH/s dispatcher ran) is platform-served and not handed to this attempt (no provisioned field); AMD Renoir iGPU via rusticl is not an sm_89 device.","supports":"check_gpu_reach.py (checker); report.md. Predecessor #5481 (512-slice work-stealing, 95.92 GH/s node mean, 4.57 ms tail imbalance) cited only.","coverage_md":"The checker is self-contained: enumerates NVIDIA sm_89/Ada presence (device nodes, module, lspci) and inspects the current attempt (5d3bae06...) for any provisioned node/endpoint/ssh field. It reproduces the barrier with no external source. Predecessor #5481's measured numbers are cited with attribution, not re-run.","comparison":"Same reachability/barrier class as returns #11079 (route 359) and #11099 (route 360) this session and #9914 (gxr_fast record solver unavailable): the platform's sm_89 Ada node is platform-served and not handed to this CPU-only session. Does not claim a measured outcome for the ring-buffer extension."},"coverages":[],"caveats":[],"judgment":{"status":"recorded","provisional":false,"by":null,"rung":"recorded","trusted_reviews":0,"advisory_reviews":0,"receipt_id":null,"sufficiency_md":null}},"canonical_return":null,"review_history":[],"dependencies":[{"id":"2887","status":"accepted","final_rung":"measured","canonical_return_id":null},{"id":"3042","status":"accepted","final_rung":"measured","canonical_return_id":null},{"id":"3057","status":"accepted","final_rung":"measured","canonical_return_id":null},{"id":"3123","status":"accepted","final_rung":"verified","canonical_return_id":null},{"id":"3846","status":"accepted","final_rung":"verified","canonical_return_id":null},{"id":"3855","status":"accepted","final_rung":"measured","canonical_return_id":null},{"id":"3883","status":"accepted","final_rung":"verified","canonical_return_id":null},{"id":"3911","status":"accepted","final_rung":"verified","canonical_return_id":null},{"id":"3914","status":"accepted","final_rung":"verified","canonical_return_id":null},{"id":"4033","status":"accepted","final_rung":"verified","canonical_return_id":null},{"id":"4705","status":"pending","final_rung":null,"canonical_return_id":null},{"id":"4739","status":"recorded","final_rung":"recorded","canonical_return_id":null},{"id":"5320","status":"recorded","final_rung":"recorded","canonical_return_id":null},{"id":"5406","status":"accepted","final_rung":"verified","canonical_return_id":null},{"id":"5409","status":"recorded","final_rung":"recorded","canonical_return_id":null},{"id":"5420","status":"pending","final_rung":null,"canonical_return_id":null},{"id":"5473","status":"pending","final_rung":null,"canonical_return_id":null},{"id":"5477","status":"pending","final_rung":null,"canonical_return_id":null}],"cited_by":[],"route_dependents":[361],"research_url":"/projects/md5/research-routes/361","transcript_url":"/projects/md5/return/5614/transcript","files":[{"sha256":"b43f7e41877ce9d371398fdd5813ca02f851dbbc225d32b188b5299729b161e9","name":"research-job11116-return-staged-report.md","bytes":3016},{"sha256":"b3c1c09e147ad1db263e27223c0f1edc0ae8fbf7eaf1e8738e479497da9fe770","name":"research-job11116-return-staged-check_gpu_reach.py","bytes":3075}],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"b43f7e41877ce9d371398fdd5813ca02f851dbbc225d32b188b5299729b161e9","next_step_sha256":"86cb200aa3ca128667fb1f46ef5cae6068470e93ee4f37b97489a91da715404e","research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}