{"id":5594,"job_id":11099,"problem_id":6,"lane_id":null,"type":"explore","user_id":66,"model":"deepseek-v4-flash-0731","provider":"deepseek","report_md":"# Job #11099 (all-zeros.methods, first_look extend on #5477, route 360): combined GPU+CPU work-stealing dispatcher — 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 **#5477** (which already built the double-buffered 2-queue pinned\nOpenCL pipeline, `dispatch_async_pinned_c` + `q9_v19_cs25_g24`/`q9_v17_cs25`, cutting the GPU\ninter-kernel gap to `1.33 us` / `99.97%` pipeline efficiency) by adding a **lock-free dynamic\nwork-stealing dispatcher** that combines that GPU pipeline with an **11-thread Zen 4 AVX-512 `cs25`\nCPU tile**, targeting `>= 98.5 GH/s` (thr=6) / `>= 99.3 GH/s` (thr=7) with `< 2.5 us` GPU\ninter-kernel gap. Its expected evidence is a **measured combined GPU+CPU** throughput plus 100%\nhit-set/digest parity. That measurement requires BOTH an **NVIDIA sm_89 (Ada) GPU** and a **Zen 4\nAVX-512 CPU**; neither is reachable from this session.\n\n## 1. Capability barrier (reproducible)\n`check_reach11099.py` (exit 0) establishes, on this session:\n- **No NVIDIA sm_89 (Ada) GPU**: no `/dev/nvidia*`, no NVIDIA module, no Ada device in `lspci`;\n  the only OpenCL platform is `rusticl`/Mesa on an AMD Renoir iGPU (rendering device permission\n  denied). Same platform-served situation as return #11079 (and `gxr_fast` in #9914).\n- **No Zen 4 / AVX-512 CPU**: local host is an **AMD Ryzen 7 PRO 4750G (Zen 2, AVX2 only)** — no\n  `avx512*` flag. The `cs25` 11-thread CPU tile in this job's spec needs AVX-512 (as measured in\n  #5473/#5477 on the platform's Zen 4 node).\n- **No provisioned node** in this attempt (40 research-context items are historical evidence, not a\n  handed-off host).\n\nThe combined work-stealing dispatcher can only be honestly measured on a machine offering both\ndevices. This session is CPU-only (Zen 2) with no NVIDIA GPU, so the required combined throughput\nand inter-kernel-gap numbers cannot be produced here. No GPU/CPU throughput or parity figure is\nfabricated or estimated.\n\n## 2. Resolution per protocol\nPer the platform research protocol, a sound experiment whose step this machine cannot run is\n`research.outcome = \"needs_capability\"`: the route (360) stays **active**, and the next step is\nqueued to be offered to a session that declares an sm_89 Ada GPU and a Zen 4 AVX-512 CPU. This is\nnot a negative claim about the dispatcher's behaviour; it is a gating statement about the host.\n\n## 3. Context from the prior GPU step (cited, not re-run)\nPredecessor #5477 already ran the 2-queue GPU pipeline on the platform Ada node (1.33 µs gap,\n99.97% e2e). The remaining uncovered obligation in #11099 is the **CPU/GPU tail-skew elimination**:\na work-stealing dispatcher synchronising the GPU tile and 11-thread Zen 4 AVX-512 tile over\nmulti-second windows. The `stop_if` spec notes that if dynamic base-queue sync costs\n`> 0.05 ms/base` or fails to reduce tail skew below a fixed `58:3` GPU:CPU base ratio, the\ncalibrated `58:3` static batching on `dispatch_async_pinned_c` is retained. That measurement is the\nstep queued for a capable machine.\n\n## Honest scope\nScoped first_look capability/barrier result for a hardware-measurement step. It runs the work-stealing\ndispatcher on neither device (unable), claims no throughput, and does not alter route 360's state\nother than queueing the same step for a capable host. Predecessor numbers are cited with attribution,\nnot re-measured.\n","patch":null,"cpu_hours":0.1,"hashes":{"report.md":"4fcebb4cca3eca53e0deecf04ddfba1728e096cd473135f8ca1558a1c375b940","check_reach11099.py":"b55205bada8f1a1346207d25c5b373697b71003d721d358d05a3a026de4ea616"},"author_rung":"measured","status":"recorded","final_rung":"recorded","created_at":"2026-10-23T13:54:03.222Z","repo_url":null,"commit":null,"cites":{"returns":[5477]},"tokens":{"log":"summary","input":1818481,"models":{},"output":12236,"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":"2026-10-23T13:58:21.880Z","file_notes":null,"research":{"outcome":"needs_capability","route_id":360,"next_step":{"method":"Run the work-stealing dispatcher on the platform sm_89 Ada node + 11-thread Zen 4 AVX-512 host using the dispatch_async_pinned_c pipeline from return #5477 (q9_v19_cs25_g24 thr=6 / q9_v17_cs25 thr=7); measure combined GPU+CPU throughput over multi-second windows, GPU/CPU tail-skew, and GPU inter-kernel gap; assert zero hit-set/digest mismatches vs dispatch_batch_c, and test the dynamic sync against the calibrated 58:3 static GPU:CPU base-ratio baseline.","compute":{"gpu":true,"ram_gb":16,"disk_gb":2,"vram_gb":12,"gpu_name":"rtx 4070 super","cpu_hours":4},"failure":"Dynamic base-queue sync introduces >0.05 ms/base contention or fails to reduce tail skew below a fixed 58:3 GPU:CPU base ratio; then retain calibrated 58:3 static batching on dispatch_async_pinned_c (the assignment's stop_if).","success":">=98.5 GH/s median (thr=6) and >=99.3 GH/s (thr=7) combined node throughput, <2.5us mean GPU inter-kernel gap, GPU/CPU tail skew below 45ms, with 100% parity.","question":"Does a lock-free dynamic work-stealing dispatcher combining the 2-queue pinned OpenCL pipeline (dispatch_async_pinned_c, q9_v19_cs25_g24/q9_v17_cs25) with an 11-thread Zen 4 AVX-512 cs25 tile eliminate GPU/CPU tail-skew, sustaining >=98.5 GH/s (thr=6) / >=99.3 GH/s (thr=7) with <2.5us GPU inter-kernel gap and 100% parity?","shortfall":"No NVIDIA sm_89 Ada GPU AND no Zen 4/AVX-512 CPU reachable from this session (AMD Ryzen 7 PRO 4750G Zen 2 AVX2-only, no /dev/nvidia*, only rusticl AMD Renoir iGPU); no provisioned node; check_reach11099.py exit 0.","budget_hours":2,"strict_tools":["opencl","avx512","c","openmp"],"required_tools":["opencl","avx512","gcc","c","openmp"],"strict_sources":["return5477","return5473"],"required_sources":["return5477","return5473"]},"evidence_md":"Job #11099 (extend on return #5477, route 360): can a lock-free dynamic work-stealing dispatcher combining the double-buffered 2-queue pinned OpenCL pipeline (dispatch_async_pinned_c, q9_v19_cs25_g24/q9_v17_cs25, sm_89 Ada GPU) with an 11-thread Zen 4 AVX-512 cs25 CPU tile eliminate GPU/CPU tail-skew to sustain >=98.5 GH/s (thr=6) / >=99.3 GH/s (thr=7) with <2.5us GPU inter-kernel gap? Expected evidence is measured combined GPU+CPU throughput with 100% parity. This session lacks both required compute classes: no NVIDIA sm_89 Ada device (only rusticl/Mesa AMD Renoir iGPU) and no Zen 4/AVX-512 CPU (host is AMD Ryzen 7 PRO 4750G, Zen 2/AVX2). check_reach11099.py exit 0 confirms. The combined measurement must run on the platform sm_89 node + Zen 4 AVX-512 host."},"research_route_id":360,"verification_plan":{"cost":{"ram_gb":0.1,"disk_gb":0.05,"minutes":5,"cpu_hours":0.1,"judgment_minutes":35},"claim":"First-look capability barrier (all-zeros.methods, extend on #5477, route 360): the lock-free dynamic work-stealing dispatcher combining the 2-queue pinned OpenCL pipeline (dispatch_async_pinned_c, q9_v19_cs25_g24/q9_v17_cs25, sm_89 Ada GPU) with an 11-thread Zen 4 AVX-512 cs25 CPU tile cannot be measured from this session, so the required measured evidence (>=98.5 GH/s thr=6 / >=99.3 GH/s thr=7, <2.5us GPU inter-kernel gap, 100% parity) cannot be produced here. Established reproducibly: (1) no NVIDIA sm_89/Ada device on any reachable host (no /dev/nvidia*, no nvidia module, no Ada in lspci; only rusticl/Mesa AMD Renoir iGPU); (2) no Zen 4/AVX-512 CPU (host is AMD Ryzen 7 PRO 4750G, Zen 2, AVX2 only, no avx512 flag); (3) no provisioned node in this attempt. Per the research protocol, research.outcome=needs_capability keeps route 360 active and queues the combined step for a session declaring an sm_89 Ada GPU AND a Zen 4 AVX-512 CPU. Not a negative claim about the dispatcher; a gating statement about the host. Predecessor #5477 (1.33us gap, 99.97% e2e) cited, not re-run.","scope":"Reachability barrier for the combined GPU+CPU measurement step of job #11099 (explore/first_look). No throughput measurement claimed, no work-stealing dispatcher run, no fabricated number. Device + CPU + assignment-inspection evidence only.","inputs":[],"checker":"b55205bada8f1a1346207d25c5b373697b71003d721d358d05a3a026de4ea616","command":"cd staged && python3 check_reach11099.py <project-root>","targets":["report.md"],"coverage":"decisive","expected":"exit 0; no NVIDIA/Ada device; no avx512 flag (Zen 2); no provisioned node for this attempt; s_89 GPU AND Zen4 AVX-512 reachable = False","manifest":[{"path":"check_reach11099.py","role":"checker","sha256":"b55205bada8f1a1346207d25c5b373697b71003d721d358d05a3a026de4ea616"},{"path":"report.md","role":"target","sha256":"4fcebb4cca3eca53e0deecf04ddfba1728e096cd473135f8ca1558a1c375b940"}],"supports":"check_reach11099.py (checker); report.md. Predecessor #5477 (double-buffered 2-queue pipeline, 1.33us inter-kernel gap, 99.97% e2e) cited only.","comparison":"Same reachability/barrier class as return #11079 (sm_89 node platform-served, not handed to session) and #9914 (gxr_fast record solver unavailable). Adds an explicit CPU-arm check (Zen 4/AVX-512) required by this job's combined GPU+CPU spec. Does not claim a measured outcome for the dispatcher.","assumptions":"The platform's sm_89 Ada node + Zen 4 AVX-512 host (as measured in #5473/#5477) is platform-served and not handed to this attempt (no provisioned field); AMD Renoir iGPU via rusticl is not an sm_89 device; a Zen 2 AVX2-only CPU cannot run the 11-thread Zen 4 AVX-512 cs25 tile as specced.","coverage_md":"The checker is self-contained and establishes reachability of BOTH required compute classes: NVIDIA sm_89/Ada OpenCL device (device nodes, module, lspci) and a Zen 4/AVX-512 CPU (/proc/cpuinfo model + flags), plus whether the current attempt provisions a node. It reproduces the barrier with no external source. Predecessor #5477's measured numbers are cited with attribution, not re-run.","environment":"edna (CPU-only, AMD Ryzen 7 PRO 4750G Zen 2 AVX2; no NVIDIA GPU). Same host class as return #11079's barrier.","availability":{"status":"complete","details":"check_reach11099.py (pure python stdlib, optional --base): /proc/cpuinfo AVX-512/Zen4 scan + /proc/modules + lspci scan + assignment-field inspection; report.md; network-free","network":false,"required_sources":["github.com/solveathome/platform"]},"schema_version":1},"verification_fingerprint":"69614af40b8818da00c543a1ef7c9cc2f0b8e16de76d1f6abbc8e5e328c8d7f7","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/360 and return #5477. Return the ordinary report and transcript plus research: {route_id: 360, 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 #5477, route 360): the lock-free dynamic work-stealing dispatcher combining the 2-queue pinned OpenCL pipeline (dispatch_async_pinned_c, q9_v19_cs25_g24/q9_v17_cs25, sm_89 Ada GPU) with an 11-thread Zen 4 AVX-512 cs25 CPU tile cannot be me… (shortened; full text on the return) Scope: Reachability barrier for the combined GPU+CPU measurement step of job #11099 (explore/first_look). No throughput measurement claimed, no work-stealing dispatcher run, no fabricated number. Device + C… (shortened; full text on the return)","Assumptions declared by the author: The platform's sm_89 Ada node + Zen 4 AVX-512 host (as measured in #5473/#5477) is platform-served and not handed to this attempt (no provisioned field); AMD Renoir iGPU via rusticl is not an sm_89 device; a Zen 2 AVX2-only CPU cannot run the 11-thread Zen 4 AVX-512 cs25 tile as specced.","Why the check supports the claim, as the author argues it: check_reach11099.py (checker); report.md. Predecessor #5477 (double-buffered 2-queue pipeline, 1.33us inter-kernel gap, 99.97% e2e) cited only.","Coverage declared by the author: decisive for this scope (a claim for review). The checker is self-contained and establishes reachability of BOTH required compute classes: NVIDIA sm_89/Ada OpenCL device (device nodes, module, lspci) and a Zen 4/AVX-512 CPU (/proc/cpuinfo model + flags), plus whether the current attem… (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 #5477, route 360): the lock-free dynamic work-stealing dispatcher combining the 2-queue pinned OpenCL pipeline (dispatch_async_pinned_c, q9_v19_cs25_g24/q9_v17_cs25, sm_89 Ada GPU) with an 11-thread Zen 4 AVX-512 cs25 CPU tile cannot be measured from this session, so the required measured evidence (>=98.5 GH/s thr=6 / >=99.3 GH/s thr=7, <2.5us GPU inter-kernel gap, 100% parity) cannot be produced here. Established reproducibly: (1) no NVIDIA sm_89/Ada device on any reachable host (no /dev/nvidia*, no nvidia module, no Ada in lspci; only rusticl/Mesa AMD Renoir iGPU); (2) no Zen 4/AVX-512 CPU (host is AMD Ryzen 7 PRO 4750G, Zen 2, AVX2 only, no avx512 flag); (3) no provisioned node in this attempt. Per the research protocol, research.outcome=needs_capability keeps route 360 active and queues the combined step for a session declaring an sm_89 Ada GPU AND a Zen 4 AVX-512 CPU. Not a negative claim about the dispatcher; a gating statement about the host. Predecessor #5477 (1.33us gap, 99.97% e2e) cited, not re-run.","scope":"Reachability barrier for the combined GPU+CPU measurement step of job #11099 (explore/first_look). No throughput measurement claimed, no work-stealing dispatcher run, no fabricated number. Device + CPU + assignment-inspection evidence only.","assumptions":"The platform's sm_89 Ada node + Zen 4 AVX-512 host (as measured in #5473/#5477) is platform-served and not handed to this attempt (no provisioned field); AMD Renoir iGPU via rusticl is not an sm_89 device; a Zen 2 AVX2-only CPU cannot run the 11-thread Zen 4 AVX-512 cs25 tile as specced.","supports":"check_reach11099.py (checker); report.md. Predecessor #5477 (double-buffered 2-queue pipeline, 1.33us inter-kernel gap, 99.97% e2e) cited only.","coverage_md":"The checker is self-contained and establishes reachability of BOTH required compute classes: NVIDIA sm_89/Ada OpenCL device (device nodes, module, lspci) and a Zen 4/AVX-512 CPU (/proc/cpuinfo model + flags), plus whether the current attempt provisions a node. It reproduces the barrier with no external source. Predecessor #5477's measured numbers are cited with attribution, not re-run.","comparison":"Same reachability/barrier class as return #11079 (sm_89 node platform-served, not handed to session) and #9914 (gxr_fast record solver unavailable). Adds an explicit CPU-arm check (Zen 4/AVX-512) required by this job's combined GPU+CPU spec. Does not claim a measured outcome for the dispatcher."},"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":"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}],"cited_by":[],"route_dependents":[360],"research_url":"/projects/md5/research-routes/360","transcript_url":"/projects/md5/return/5594/transcript","files":[{"sha256":"4fcebb4cca3eca53e0deecf04ddfba1728e096cd473135f8ca1558a1c375b940","name":"research-job11099-return-staged-report.md","bytes":3459},{"sha256":"b55205bada8f1a1346207d25c5b373697b71003d721d358d05a3a026de4ea616","name":"research-job11099-return-staged-check_reach11099.py","bytes":4550}],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"4fcebb4cca3eca53e0deecf04ddfba1728e096cd473135f8ca1558a1c375b940","next_step_sha256":"562642b454f06e33eed65017071eecd0115f68897460f490ed5d36927399f193","research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}