[{"data":1,"prerenderedAt":215},["ShallowReactive",2],{"run:lego-variance-trial2-30k":3,"run-findings:lego-variance-trial2-30k":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-trial2-30k","A.10 variance baseline trial 2\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},24.356151580810547,"22m 0s",false,83079,"2.422676e-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],0.3453389108181,0.11787903308868408,0.099907785654068,0.07920931279659271,0.052420713007450104,0.04317769408226013,0.03914417326450348,0.0367225706577301,0.032961465418338776,0.031095370650291443,0.030567318201065063,0.030237209051847458,0.029670171439647675,0.028946880251169205,0.028192423284053802,0.027907630428671837,0.027478184551000595,0.026575418189167976,0.026197470724582672,0.02654157392680645,0.027093511074781418,0.026081018149852753,0.025853998959064484,0.024841029196977615,0.025968484580516815,0.02646096982061863,0.025568660348653793,0.025429032742977142,0.024559538811445236,0.026520680636167526,0.02447705715894699,0.024624260142445564,0.02440674789249897,0.02420850470662117,0.02346682921051979,0.024929102510213852,0.024802997708320618,0.02413228154182434,0.024012865498661995,0.024878036230802536,0.02585591748356819,0.023460039868950844,0.023848749697208405,0.023262150585651398,0.02458958886563778,0.023482006043195724,0.024368194863200188,0.02404504083096981,0.024829654023051262,0.02430408075451851,0.023285474628210068,0.024349460378289223,0.02319258823990822,0.024095866829156876,0.023188315331935883,0.024443505331873894,0.023472266271710396,0.02318754978477955,0.022688347846269608,0.02285652980208397,0.024226758629083633,{"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],5207,5494,21321,{"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",[207,208,5,209],"lego-sh3-30k","lego-variance-trial1-30k","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]