Coppelius.Build.DeviceImages

AdamW over the whole flat bank in one launch, the parameters' half copies written with it (Realization.Nvidia.SM86. AdamWHalfSM86, its stalls compacted): a grid of coppeliusAdamWBlocks blocks walks the bank's element quads with a grid stride. The bank's elements are the checkpoint's (it is P, M and V, each the parameter bank); the plan holds its own bank to the same count (Coppelius.Build. Graph.cgAdamWCoversTheBank).

369def coppeliusAdamWBlocks : Nat = 1024