refined the chaining skeleton
refined the chaining skeleton

[git-p4: depot-paths = "//sw/gpgpu/nvbio/internal/": change = 18311907]

NVlabs/nvbio,kimrutherford/nvbio,kimrutherford/nvbio,kimrutherford/nvbio,NVlabs/nvbio,NVlabs/nvbio,NVlabs/nvbio,kimrutherford/nvbio