[{"data":1,"prerenderedAt":166},["ShallowReactive",2],{"run:revisit-losspath-gpu-12500-r2":3,"run-findings:revisit-losspath-gpu-12500-r2":137},{"run":4,"config":19,"metrics":82,"curve":88,"assets":136},{"id":5,"title":5,"subtitle":6,"eyebrow":7,"date":8,"workspace":9,"commit":10,"tags":11,"verdict":18},"revisit-losspath-gpu-12500-r2","保持 flag 再 gate sweep: loss_path = gpu の 12.5k full run repeat 2 (同一 session 交互 A\u002FB)","Run summary · 2026-08-16 保持 flag 全数再 gate sweep (S2 後)","2026-08-16","splat","3027e33",[12,13,14,15,16,17],"p2-flag-revisit-sweep","loss-path","gpu-gate","no-profile","lego-12500","gpu","partial",[20,23,26,29,32,35,38,41,44,47,50,53,56,59,62,65,68,71,74,77,79],{"key":21,"value":22},"dataset","\u002FUsers\u002Fotkrickey\u002Fdev\u002F3dgs-workspace\u002Fdatasets\u002Fnerf_synthetic\u002Flego",{"key":24,"value":25},"gt_convention","Premultiplied",{"key":27,"value":28},"iterations","12,500",{"key":30,"value":31},"seed","42",{"key":33,"value":34},"capacity","1,000,000 splats",{"key":36,"value":37},"sh_degree","3",{"key":39,"value":40},"loss","L1Ssim",{"key":42,"value":43},"lambda","0.200",{"key":45,"value":46},"ssim","window=7 sigma=1",{"key":48,"value":49},"backend.backward","Simd",{"key":51,"value":52},"backend.loss_path","Gpu",{"key":54,"value":55},"backend.emit_pairs","Original",{"key":57,"value":58},"backend.forward","F32",{"key":60,"value":61},"backend.dispatch","PerStage",{"key":63,"value":64},"backend.radix_scan","GpuHierarchical",{"key":66,"value":67},"backend.binning","Resident",{"key":69,"value":70},"backend.tile_sort","GlobalRadix",{"key":72,"value":73},"backend.submission","Chained",{"key":75,"value":76},"backend.target_cache","true",{"key":78,"value":76},"backend.shader_fast_math",{"key":80,"value":81},"os_build","26.5.2 (25F84)",{"psnr":83,"wallclock":84,"wallclock_regress":85,"splats":86,"final_loss":87},36.23956298828125,"3m 6s",false,407822,"5.493573e-3",{"loss":89,"splats":120},{"iters":90,"values":105},[91,92,93,94,95,96,97,98,99,100,101,102,103,104],1,1000,2000,3000,4000,5000,6000,7000,8000,9000,10000,11000,12000,12500,[106,107,108,109,110,111,112,113,114,115,116,117,118,119],0.5938450694084167,0.054736796766519547,0.013987066224217415,0.008314988575875759,0.0074835228733718395,0.006619701161980629,0.006180538795888424,0.005983551032841206,0.005769947078078985,0.005732021294534206,0.00559307960793376,0.005609499290585518,0.005537101067602634,0.0054935733787715435,{"iters":121,"values":122},[91,92,93,94,95,96,97,98,99,100,101,102,103,104],[123,124,125,126,127,128,129,130,131,132,133,134,135,86],5207,8243,182127,296698,348722,374500,389018,397000,401323,403674,404916,405906,407093,{"has_renders":85,"has_splat":85},[138],{"id":12,"title":139,"date":8,"status":140,"polarity":141,"category":142,"axes":143,"tags":145,"task_code":154,"related_runs":155,"delta_psnr":-1,"delta_wallclock":161,"rank":162,"verdict":163,"impact_summary":164,"detail_path":165},"保持 flag 全数再 gate sweep — 8 維持 \u002F 1 flip (loss_path -26.5%) + bench validate 抜けを発見","stable","positive","performance",[91,144],3,[146,147,13,148,149,150,151,152,153],"flag-revisit","gate-sweep","backend-config","validate","regression-guard","lego","stop-the-pop","default-flip","保持 flag 全数再 gate sweep (2026-08-16 GPU 専有タスク)",[156,157,158,159,5,160],"revisit-losspath-host-12500-r1","revisit-losspath-host-12500-r2","revisit-losspath-host-12500-r3","revisit-losspath-gpu-12500-r1","revisit-losspath-gpu-12500-r3","loss_path flip: replay -26.5% (final) \u002F -29.6% (iter5000)、12.5k gate -35.3% — ただし公式 config は既に gpu 明示のため公表値は不変 (hygiene flip)","high","accepted","\u003Ccode>BackendConfig\u003C\u002Fcode> 全 16 field を機械走査し、default 以外の variant を全数再判定。実測 9 件のうち \u003Cstrong>8 件は verdict 維持\u003C\u002Fstrong>、\u003Cstrong>1 件 (\u003Ccode>loss_path\u003C\u002Fcode>) が flip\u003C\u002Fstrong>。\u003Ccode>loss_path = \"gpu\"\u003C\u002Fcode> は replay final regime \u003Cstrong>21.210 → 15.591 ms\u002Fiter (-26.5%)\u003C\u002Fstrong> \u002F iter5000 \u003Cstrong>-29.6%\u003C\u002Fstrong>、12.5k full gate (同一 session 交互 A\u002FB、n=3) で \u003Cstrong>283.00 → 183.00s (-35.3%)\u003C\u002Fstrong>・PSNR \u003Cstrong>36.142 → 36.188 dB (+0.047、guard ±0.1 内)\u003C\u002Fstrong>。ただし \u003Cstrong>この flip は公式数値を 1 つも動かさない hygiene\u003C\u002Fstrong> — 全 237 config が \u003Ccode>loss_path\u003C\u002Fcode> を明示指定済みで 12.5k gate 系は例外なく \u003Ccode>\"gpu\"\u003C\u002Fcode>、enum default だけが 2026-04-30 以来実運用から取り残されていた。残り 7 件は validate hard error による構造的非互換 (5) \u002F 禁忌リスト (2) \u002F harness 非対応 (1) \u002F 非 perf variant (3) として理由付きで判定不能を記録。副産物として \u003Ccode>splat bench\u003C\u002Fcode> の \u003Ccode>validate()\u003C\u002Fcode> 抜け (無効組合せが exit 0 で silent 別経路実行) を発見・修正した。","\u002Ffindings\u002Fp2-flag-revisit-sweep\u002F",1790227325604]