[{"data":1,"prerenderedAt":215},["ShallowReactive",2],{"run:lego-variance-trial1-30k":3,"run-findings:lego-variance-trial1-30k":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-trial1-30k","A.10 variance baseline trial 1\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},24.858051300048828,"22m 7s",false,84149,"2.343816e-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],0.3453390896320343,0.11787869036197662,0.1014239490032196,0.08077286928892136,0.05543160438537598,0.045941468328237534,0.040324993431568146,0.03812948986887932,0.03355700150132179,0.03278779610991478,0.03472325578331947,0.03075014054775238,0.02998882532119751,0.02913743630051613,0.028791865333914757,0.029274914413690567,0.0278925783932209,0.026729917153716087,0.02719840779900551,0.028174158185720444,0.026500742882490158,0.027902312576770782,0.027276992797851562,0.027989957481622696,0.025758560746908188,0.026087399572134018,0.027593545615673065,0.02589517831802368,0.025032831355929375,0.025861168280243874,0.02645123191177845,0.025280091911554337,0.026269331574440002,0.026191744953393936,0.024929944425821304,0.02497953362762928,0.024844788014888763,0.025669001042842865,0.02442305162549019,0.025171920657157898,0.0260601993650198,0.025940174236893654,0.024824269115924835,0.02354109100997448,0.024737831205129623,0.024440493434667587,0.024724893271923065,0.024842143058776855,0.02504105120897293,0.02445477992296219,0.023924462497234344,0.023584526032209396,0.024519026279449463,0.02457103133201599,0.024125348776578903,0.023383334279060364,0.023844636976718903,0.023551704362034798,0.024722440168261528,0.023441797122359276,0.02343815751373768,{"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],5207,5494,21275,{"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",[207,5,208,209],"lego-sh3-30k","lego-variance-trial2-30k","lego-variance-trial3-30k","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]