{"_comment":"Hand-run scale_density campaign on aws-c9g-16xlarge, 2026-11-08. Ramps are every Nth step of the bench's WASH_SCALE_REPORT_JSON report (steps columns as in step_fields). Walls are the ceiling each change moved; see density.js.","host_label":"aws-c9g-16xlarge","machine":"EC2 c9g.16xlarge: 64 Arm Neoverse-V3 cores, 128 GB, 2 NUMA nodes","date":"2026-11-08","component":"http_handler_p3 (a wasi:http@0.3 handler)","footprint_includes_page_tables":true,"step_fields":["workloads","footprint_bytes","starts_per_sec","requests_per_sec","request_p50_ms","request_p99_ms","cpu_percent"],"ramps":{"warm":{"label":"warm-growth-layout64MiB+64KiB","stop":"max-process-memory (7705 growths refused)","memory_limit_bytes":120259084288,"baseline_footprint_bytes":810094592,"marginal_bytes_per_workload":84440,"cpu_secs_total":516.339923885,"steps":[[10000,1760358400,27759,152520,0.612,1.132,19.3],[30000,3458715648,32442,158741,0.513,1.037,21.2],[50000,5147049984,33632,137286,0.729,1.276,20.5],[70000,6837137408,33579,166280,0.455,0.953,20.5],[90000,8518119424,33922,168613,0.424,0.972,18.7],[110000,10201575424,33559,151134,0.596,1.089,19.0],[130000,11900628992,33686,139914,0.577,1.154,18.7],[150000,13584883712,33637,155665,0.544,1.038,18.9],[170000,15270805504,33613,174825,0.451,0.944,19.1],[190000,16958193664,33126,149350,0.591,1.078,19.2],[210000,18647486464,34137,156353,0.557,1.064,19.1],[230000,20366176256,26655,163643,0.53,1.055,15.8],[250000,22062297088,34602,154592,0.558,1.071,19.4],[270000,23753142272,33946,144892,0.677,1.154,18.9],[290000,25443225600,34094,154468,0.524,1.139,19.2],[310000,27132112896,33707,157259,0.56,1.04,19.3],[330000,28820619264,32274,149268,0.588,1.078,18.3],[350000,30505283584,33706,166201,0.443,0.998,18.9],[370000,32195497984,33293,153563,0.551,1.086,19.3],[390000,33882906624,34207,148768,0.555,1.134,18.4],[410000,35568111616,34435,159352,0.514,1.041,19.0],[430000,37255376896,34532,159006,0.578,1.018,19.2],[450000,38943645696,34204,155789,0.583,1.044,19.4],[470000,40689221632,34252,168182,0.519,0.985,19.6],[490000,42378309632,34454,150927,0.639,1.135,19.2],[510000,44063989760,34614,166279,0.49,1.059,19.1],[530000,45748908032,34619,157933,0.532,1.012,19.7],[550000,47434817536,34566,136887,0.693,1.263,19.2],[570000,49120145408,34544,150463,0.604,1.15,19.4],[590000,50805010432,34251,169108,0.494,0.942,19.3],[610000,52489449472,33877,164155,0.511,1.009,19.2],[630000,54174388224,34175,162338,0.483,0.999,19.3],[650000,55864430592,34388,168878,0.476,0.946,19.4],[670000,57543962624,34455,167109,0.425,0.984,19.2],[690000,59228192768,34434,134329,0.703,1.28,19.0],[710000,60912439296,34787,144809,0.665,1.206,19.6],[730000,62599536640,34351,158232,0.473,1.042,20.0],[750000,64288923648,34609,151904,0.572,1.093,19.5],[770000,65973235712,34784,153351,0.641,1.071,18.9],[790000,67657674752,34458,153793,0.646,1.069,19.3],[810000,69341704192,34458,160744,0.521,1.074,19.2],[830000,71026659328,34830,162818,0.501,1.009,19.5],[850000,72710148096,34113,140600,0.66,1.156,19.1],[870000,74393812992,34603,147145,0.585,1.168,19.2],[890000,76078632960,34220,159908,0.526,1.015,19.3],[910000,77773848576,32120,164060,0.515,0.991,18.3],[930000,79569383424,31487,156652,0.55,1.045,18.0],[950000,81260146688,33200,140752,0.659,1.211,19.2],[970000,82943537152,33796,142772,0.671,1.189,19.3],[990000,84627365888,33948,168686,0.414,1.009,19.0],[1010000,86310567936,34071,151672,0.565,1.076,18.9],[1030000,87993638912,34163,151889,0.603,1.107,19.0],[1050000,89677103104,34123,162802,0.476,0.967,18.9],[1070000,91360358400,34273,156563,0.513,1.033,19.2],[1090000,93044068352,34217,167559,0.476,0.978,19.2],[1110000,94727241728,33966,151036,0.604,1.205,18.9],[1130000,96410390528,33597,146247,0.642,1.168,19.4],[1150000,98092875776,33592,164759,0.42,1.007,19.5],[1170000,99776765952,33824,162267,0.52,0.988,19.5],[1190000,101460516864,33350,152102,0.615,1.11,19.0],[1210000,103143837696,33483,159505,0.505,1.016,19.3],[1230000,104826814464,33087,160367,0.644,1.011,19.2],[1250000,106510397440,33383,189719,0.28,0.865,19.4],[1270000,108194156544,33238,150700,0.627,1.087,19.0],[1290000,109887741952,32561,155809,0.558,1.09,19.2],[1310000,111560921088,33239,162194,0.482,1.009,19.4],[1330000,113244454912,32987,164151,0.555,1.05,19.7],[1350000,114927050752,33136,139278,0.6,1.187,19.5],[1370000,116610113536,32923,164144,0.489,0.979,19.4],[1390000,118293684224,33028,153051,0.519,1.119,19.1],[1410000,119976890368,32927,157764,0.563,1.044,19.3],[1420000,120272134144,45529,124194,0.785,1.398,44.5]]},"scale_to_zero":{"label":"scale-to-zero-growth","stop":"max-process-memory (200 growths refused)","memory_limit_bytes":120259084288,"baseline_footprint_bytes":13721600,"marginal_bytes_per_workload":12399,"cpu_secs_total":793.631285856,"steps":[[50000,693960704,156931,5743,21.47,34.426,17.3],[200000,2507776000,174725,48696,2.441,3.705,20.2],[350000,4376473600,178932,41051,3.223,4.526,20.5],[500000,6251036672,108567,42482,3.371,4.392,14.1],[650000,8053694464,178954,53576,2.33,3.593,20.4],[800000,9848692736,175857,51763,2.521,3.566,20.4],[950000,11772600320,53898,37482,3.032,4.91,9.3],[1100000,13570715648,170994,42729,3.135,4.405,21.6],[1250000,15361007616,169468,55816,1.976,3.25,21.9],[1400000,17151430656,174075,45974,3.0,3.98,20.1],[1550000,18934255616,167513,53460,2.223,3.44,20.6],[1700000,20717027328,174194,53560,2.319,3.472,19.7],[1850000,22751604736,37276,54509,2.219,3.271,6.1],[2000000,24546598912,175732,53645,1.937,3.268,20.0],[2150000,26327945216,176579,60311,1.859,3.034,20.6],[2300000,28111835136,175744,52087,2.277,3.585,20.1],[2450000,29898858496,175198,48907,2.736,3.857,19.8],[2600000,31686275072,175458,54570,2.236,3.508,20.6],[2750000,33475833856,172263,46623,2.662,4.041,20.9],[2900000,35266105344,163848,33556,3.987,5.684,21.0],[3050000,37064069120,165093,39806,3.47,4.727,22.2],[3200000,38866505728,169985,39540,3.439,4.668,21.7],[3350000,40662597632,167434,40583,3.437,4.614,20.2],[3500000,42458816512,167069,55049,2.256,3.309,20.1],[3650000,44299825152,107540,54981,2.152,3.296,14.1],[3800000,46589423616,160379,48715,2.724,3.776,20.6],[3950000,48393809920,167568,50290,2.551,3.657,21.2],[4100000,50201477120,166165,52580,2.058,3.496,21.4],[4250000,52019531776,167237,51105,2.343,3.644,21.1],[4400000,53829988352,161656,53153,2.099,3.428,22.4],[4550000,55647895552,167678,53120,2.163,3.494,22.4],[4700000,57465126912,164814,51665,2.291,3.432,21.9],[4850000,59292700672,167402,48791,2.257,3.821,22.5],[5000000,61121921024,169516,45696,2.835,4.099,22.1],[5150000,62943784960,166554,48851,2.6,3.706,22.1],[5300000,64772018176,170195,51706,2.349,3.6,21.9],[5450000,66610569216,168038,45468,3.305,4.133,22.1],[5600000,68441972736,166042,45911,2.833,3.99,23.0],[5750000,70276411392,167255,45531,3.1,4.259,21.8],[5900000,72121081856,172273,54166,2.195,3.389,22.3],[6050000,73963880448,172072,39138,3.54,4.899,22.8],[6200000,75805192192,165948,48965,2.374,3.835,23.6],[6350000,77667442688,170794,47361,2.569,3.882,22.5],[6500000,79521652736,161567,52483,2.108,3.501,22.8],[6650000,81388740608,170712,48123,2.691,3.862,22.5],[6800000,83247259648,173787,47734,2.547,3.812,21.6],[6950000,85117620224,175197,50329,2.648,3.722,21.5],[7100000,86976827392,174614,59321,1.734,3.134,21.3],[7250000,88846974976,159059,43036,3.374,4.35,19.7],[7400000,91756335104,62260,50929,2.747,3.671,9.0],[7550000,93626388480,175393,48707,2.692,3.858,20.6],[7700000,95491051520,175360,57052,1.987,3.298,20.2],[7850000,97357422592,172968,49395,2.564,3.651,22.1],[8000000,99235307520,174835,40126,3.538,4.805,22.5],[8150000,101099548672,175060,52745,2.255,3.641,22.4],[8300000,102969004032,174461,51672,2.305,3.56,22.2],[8450000,104839938048,175911,52080,2.66,3.542,22.1],[8600000,106708066304,175368,53953,1.965,3.502,21.2],[8750000,108574502912,174399,59102,1.79,3.116,22.4],[8900000,110433804288,173548,58033,1.88,3.193,21.9],[9050000,112301899776,174845,49457,2.682,3.776,22.2],[9200000,114166173696,175556,48344,2.802,3.87,22.2],[9350000,116026220544,175757,46078,2.7,4.117,22.3],[9500000,117881294848,173592,58547,1.865,3.058,21.5],[9650000,119733059584,174598,52354,2.336,3.578,22.2],[9692498,120262459392,145257,0.0,null,null,19.8]],"warmup_steps":1}},"walls":[{"workloads":16250,"label":"CI defaults on main","detail":"2 GiB process memory; pool sized from x86's 128 TiB address space","run_id":"42507683003"},{"workloads":32513,"label":"arm64 address space","detail":"pool sized from the 256 TiB arm64 actually has","pr":5934},{"workloads":158000,"label":"100 GiB, 256 MiB slots","detail":"process cap raised; smaller memory reservation per instance"},{"workloads":236000,"label":"copy-on-write images off","detail":"4 mappings per instance instead of 6 under vm.max_map_count"},{"workloads":480000,"label":"64 MiB slots, 16M mappings","detail":"vm.max_map_count raised; stopped by the uncharged initial-memory cap"},{"workloads":1060000,"label":"initial-memory cap raised","detail":"4 TiB cap; stopped by the 1.05M-memory pool"},{"workloads":1420000,"label":"page tables counted","detail":"1.7M pool at 112 GiB, the guard now sees page tables, a clean stop","pr":5935}],"ci_run":{"run_id":"42518075316","label":"bench million_warm on main: 1,410,000 warm components served, 8,630,000 scale-to-zero"}}