[{"data":1,"prerenderedAt":215},["ShallowReactive",2],{"run:lego-variance-trial3-30k":3,"run-findings:lego-variance-trial3-30k":189},{"run":4,"config":14,"metrics":45,"curve":51,"assets":183},{"id":5,"title":5,"subtitle":6,"eyebrow":7,"date":8,"workspace":9,"commit":10,"tags":11,"verdict":13},"lego-variance-trial3-30k","A.10 variance baseline trial 3\u002F3 (seed=42 固定で GPU 非決定性のみ観測)","Run summary · Phase 5","2026-05-23","splat","5573681",[12,5],"auto-bench","partial",[15,18,21,24,27,30,33,36,39,42],{"key":16,"value":17},"dataset","\u002FUsers\u002Fotkrickey\u002Fdev\u002F3dgs-workspace\u002Fdatasets\u002Fnerf_synthetic\u002Flego",{"key":19,"value":20},"iterations","30,000",{"key":22,"value":23},"seed","42",{"key":25,"value":26},"capacity","1,000,000 splats",{"key":28,"value":29},"sh_degree","3",{"key":31,"value":32},"loss","L1Ssim",{"key":34,"value":35},"lambda","0.200",{"key":37,"value":38},"ssim","window=7 sigma=1",{"key":40,"value":41},"backend.backward","Simd",{"key":43,"value":44},"backend.loss_path","Gpu",{"psnr":46,"wallclock":47,"wallclock_regress":48,"splats":49,"final_loss":50},25.241147994995117,"22m 20s",false,86423,"2.403272e-2",{"loss":52,"splats":177},{"iters":53,"values":115},[54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114],1,500,1000,1500,2000,2500,3000,3500,4000,4500,5000,5500,6000,6500,7000,7500,8000,8500,9000,9500,10000,10500,11000,11500,12000,12500,13000,13500,14000,14500,15000,15500,16000,16500,17000,17500,18000,18500,19000,19500,20000,20500,21000,21500,22000,22500,23000,23500,24000,24500,25000,25500,26000,26500,27000,27500,28000,28500,29000,29500,30000,[116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176],0.3453386425971985,0.11787892878055573,0.09885053336620331,0.08236338198184967,0.057719141244888306,0.049189839512109756,0.04279937595129013,0.04164306819438934,0.03707487881183624,0.035924170166254044,0.0345509797334671,0.032476767897605896,0.030381549149751663,0.02988203428685665,0.029446357861161232,0.029485857114195824,0.029474172741174698,0.028170637786388397,0.02716672234237194,0.02731991745531559,0.027472294867038727,0.027377068996429443,0.02600196748971939,0.025864584371447563,0.02801378071308136,0.027630556374788284,0.026532484218478203,0.025794031098484993,0.025225793942809105,0.026246070861816406,0.02556758001446724,0.025157306343317032,0.025737415999174118,0.024386128410696983,0.025562437251210213,0.026617124676704407,0.023857487365603447,0.024372560903429985,0.024546947330236435,0.023853251710534096,0.024889696389436722,0.025119677186012268,0.025154609233140945,0.023710567504167557,0.025784537196159363,0.024594081565737724,0.024574216455221176,0.024939902126789093,0.02428886480629444,0.02404017001390457,0.02387305535376072,0.02337939850986004,0.024118874222040176,0.02452712133526802,0.023641185835003853,0.02410091646015644,0.02395833656191826,0.022767310962080956,0.023902282118797302,0.024770967662334442,0.024032723158597946,{"iters":178,"values":179},[54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114],[180,181,182,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49,49],5207,5494,21139,{"has_renders":184,"has_splat":48,"render_views":185},true,[186,187,188],"00","01","02",[190],{"id":191,"title":192,"date":8,"status":193,"polarity":194,"category":195,"axes":196,"tags":198,"task_code":205,"related_runs":206,"delta_psnr":210,"delta_wallclock":211,"rank":212,"verdict":193,"impact_summary":213,"detail_path":214},"a-10-variance-baseline","A.10 variance baseline — σ ±0.32 dB \u002F range 0.885 dB を実測","stable","negative","experiment",[197],3,[199,200,201,202,203,204],"phase-5","variance","gpu-non-determinism","kahan","atomic","apple-silicon","A.10",[207,208,209,5],"lego-sh3-30k","lego-variance-trial1-30k","lego-variance-trial2-30k","σ ±0.32 dB \u002F range 0.885 dB","σ ±2.4% \u002F range 5.2%","high","M-3.x lego sh3 30k の PSNR variance は σ ±0.32 dB \u002F range 0.885 dB (4 run estimate)、wallclock variance は σ ±2.4% \u002F range 5.2%。原因は SIMD backward kernel の atomic_fetch_add 順序非決定性で、A.10 Kahan で消えない (compensator も bit-identical のところ)。卒論 finding として「Apple Silicon の variance band は数値精度の問題でなく GPU scheduler 由来」と確定。","\u002Ffindings\u002Fa-10-variance-baseline\u002F",1782449788241]